JPH0981261A - Electronic equipment and information processing equipment - Google Patents

Abstract

(57) Abstract: An electronic device provided with an analog circuit and a digital circuit that operates in synchronization with a clock pulse, and a clock pulse that is operated near the electronic device equipped with the analog circuit. It is an object of the present invention to maintain high performance and functions while adapting to a pass band in an operating condition and surely alleviate restrictions related to an operating environment with respect to an information processing device that operates in synchronization. In an electronic device including an analog circuit (11) and a digital circuit (12) operating in synchronization with a clock pulse in which a harmonic component can be distributed in a pass band, the harmonic component distributed in the pass band is minimized. The storage means 13 that stores the duty ratio in advance, the duty ratio selection means 14 that reads the duty ratio corresponding to the pass band given from the outside from the storage means 13, and the duty ratio changing means 15 that sets the duty ratio to the read value. And is configured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device equipped with an analog circuit and a digital circuit that operates in synchronization with a clock pulse, and operates in the vicinity of an electronic device equipped with an analog circuit to synchronize with the clock pulse. The present invention relates to an information processing device that operates by performing.

[0002]

2. Description of the Related Art A clock pulse given to a digital circuit as a time or frequency reference generally has a rectangular waveform and contains many high-order harmonic components. Therefore, in a radio receiving device in which an analog circuit and a digital circuit that operates in synchronization with a clock pulse are arranged in a narrow space, harmonic components of the clock pulse are distributed in the pass band of the analog circuit and become an interfering wave. It is received and interferes with the original received wave.

Conventionally, in order to suppress such interference, for example, Japanese Patent Application Nos. 1-20953 and 3-2.
As disclosed in Japanese Patent Application No. 2739, Japanese Patent Application No. 1-59583 and Japanese Patent Application No. 3-27489, a pass band is obtained by subjecting a clock pulse to modulation processing or shifting the frequency of the clock pulse. The prior art was applied to suppress the harmonic components that fall into the.

[0004]

However, among the above-mentioned prior arts, the one in which the clock pulse is subjected to the modulation processing is as follows.
Unless the modulation depth of frequency modulation is set to a significantly high value,
Even if the harmonic components that fall into the pass band cannot be suppressed sufficiently, or the harmonic components that fall into the pass band can be suppressed,
In many cases, the frequency of the clock pulse has a value that is significantly different from the original value. Further, in the case of shifting the frequency of the clock pulse, the digital circuit cannot keep the frequency range used as the reference of time or frequency, and the original function is often impaired.

It is an object of the present invention to provide an electronic device whose performance and functions are maintained high while adapting to a pass band in an operating condition, and an information processing device which surely relaxes restrictions related to an operating environment. To do.

[0006]

FIG. 1 is a block diagram showing the principle of the first aspect of the present invention.

The invention described in claim 1 is an analog circuit 1
1 and a digital circuit 12 that operates in synchronization with a clock pulse in which a harmonic component may be distributed in the pass band of the analog circuit 11, the harmonics distributed in the pass band corresponding to the pass band. A storage unit 13 that stores in advance a duty ratio that minimizes the wave component; a duty ratio selection unit 14 that refers to the storage unit 13 based on an externally provided pass band and reads the duty ratio corresponding to the pass band; The duty ratio changing means 15 for setting the duty ratio of the clock pulse to the duty ratio read by the duty ratio selecting means 14 is provided.

FIG. 2 is a block diagram showing the principle of the invention described in claim 2. The invention according to claim 2 operates in synchronization with an analog circuit 22 having an output means 21 for outputting the distribution of frequency components in the pass band, and a clock pulse in which harmonic components can be distributed in the pass band of the analog circuit 22. In the electronic device including the digital circuit 23, the storage unit 24 corresponding to the pass band, in which the duty ratio that minimizes the harmonic component distributed in the pass band is stored in advance, and based on the input command, Man-machine interface means 25 for selecting one of the duty ratios stored in the storage means 24, and duty ratio changing means 26 for setting the duty ratio of the clock pulse to the duty ratio selected by the man-machine interface means 25 are provided. It is characterized by that.

FIG. 3 is a block diagram showing the principle of the invention described in claim 3. According to a third aspect of the invention, in the electronic device including the analog circuit 11 and the digital circuit 12 that operates in synchronization with a clock pulse in which a harmonic component can be distributed in the pass band of the analog circuit 11, the analog circuit 1 is provided.
The automatic control unit 31 that automatically controls the duty ratio of the clock pulse with the difference between the power obtained at the output end of No. 1 and the target value that is known about the power under the pass band as an operation amount; The duty ratio changing means 32 for setting the duty ratio of the clock pulse to the duty ratio automatically controlled by 31 is provided.

FIG. 4 is a block diagram of the principle of the invention described in claim 4. The invention according to claim 4 operates in synchronization with an analog circuit 22 having an output means 21 for outputting the distribution of frequency components in the pass band, and a clock pulse in which harmonic components can be distributed in the pass band of the analog circuit 22. In the electronic device including the digital circuit 23, the man-machine interface means 24 serving as a man-machine interface for designating the duty ratio of the clock pulse.
And a duty ratio changing means 42 for setting the duty ratio of the clock pulse to the duty ratio designated via the man-machine interface means 41.

FIG. 5 is a block diagram showing the principle of the invention described in claim 5. According to a fifth aspect of the present invention, in an information processing device that operates in synchronization with a clock pulse in which a harmonic component can be distributed in a pass band of an analog circuit 51 arranged outside, a pass band for obtaining a pass band of the analog circuit. Refer to the monitoring means 52, the storage means 53 corresponding to the pass band, which stores in advance the duty ratio that minimizes the harmonic component distributed in the pass band, and the storage means 53 based on the pass band given from the outside. The duty ratio selecting means 54 for reading the duty ratio corresponding to the pass band and the duty ratio changing means 55 for setting the duty ratio of the clock pulse to the value read by the duty ratio selecting means 54 are provided. Characterize.

FIG. 6 is a block diagram showing the principle of the invention described in claim 6. The invention according to claim 6 is operated together with an analog circuit 62 including an output means 61 for outputting the distribution of frequency components in the pass band, and the information operates in synchronization with clock pulses in which harmonic components can be distributed in the pass band. In the processing device, for each aspect of the pass band, a storage unit 63 that stores in advance a duty ratio that minimizes the harmonic components distributed in the pass band, and a man-machine interface that is related to the designation of the duty ratio of the clock pulse are used. The man-machine interface means 64 and the duty ratio varying means 65 for referring to the duty ratio stored in the storage means 63 based on the designation and setting the duty ratio of the clock pulse to the duty ratio are provided. .

FIG. 7 is a block diagram showing the principle of the invention described in claim 7. The invention according to claim 7 is obtained at the output end of the analog circuit 51 in an information processing device that operates in synchronization with a clock pulse in which a harmonic component can be distributed in the pass band of the analog circuit 51 arranged outside. Power and
An automatic control unit 71 that automatically controls the duty ratio of the clock pulse by using the difference between the power and a known target value under the pass band as an operation amount, and the duty ratio of the clock pulse that is automatically controlled by the automatic control unit 71. And a duty ratio changing means 73 for setting the duty ratio.

FIG. 8 is a block diagram showing the principle of the invention described in claim 8. The invention described in claim 8 is operated together with an analog circuit 62 including an output means 61 for outputting the distribution of frequency components in the pass band, and operates in synchronization with a clock pulse in which harmonic components can be distributed in the pass band. In an information processing device, a man-machine interface unit 81 that serves as a man-machine interface for designating a duty ratio of a clock pulse, and a duty ratio that sets the duty ratio of the clock pulse to the duty ratio designated via the man-machine interface unit 81. Variable means 82
And characterized in that:

In the electronic device according to the first aspect of the present invention, the harmonic components of the clock pulse with which the digital circuit 12 operates in synchronization can be distributed in the pass band of the analog circuit 11. Corresponding to such a pass band, the duty ratio of the clock pulse having the smallest harmonic component distributed in the pass band is stored in advance in the storage unit 13, and the duty ratio selecting unit 14 externally outputs the analog circuit described above. The duty ratio corresponding to the pass band is read by referring to the storage means 13 based on the given pass band.

The duty ratio read out in this way is generally one of the requirements for changing the distribution of the frequency spectrum of the clock pulse in the state where the frequency of the clock pulse is constant, and is the Fourier transform. It can be calculated in advance by applying the or Fourier series, or can be calculated based on actual measurement. Therefore, under the duty ratio set by the duty ratio changing means 15, the harmonics distributed in the pass band of the analog circuit 11 are suppressed without changing the frequency described above.

In the electronic device according to the second aspect of the present invention, the output means 21 outputs the distribution of frequency components in the pass band of the analog circuit 22, and the harmonic components of the clock that the digital circuit 23 operates in synchronization with each other. It can be distributed in the pass band. The memory means 24 stores in advance the duty ratio with which the harmonic component of the clock pulse distributed in the pass band is minimized for each mode of the pass band, and the man-machine interface means 25 is thus stored. One of the duty ratios is selected based on the input command.

The duty ratio selected in this manner is generally one of the requirements for changing the distribution of the frequency spectrum of the clock pulse when the frequency of the clock pulse is constant, as described above. It can be calculated in advance by applying the Fourier series or calculated based on actual measurement. Therefore,
Under the duty ratio set by the duty ratio varying means 26, the harmonics distributed in the pass band of the analog circuit 22 are suppressed without changing the frequency described above.

In the electronic apparatus according to the third aspect of the present invention, the harmonic components of the clock pulse with which the digital circuit 12 operates in synchronization can be distributed in the pass band of the analog circuit 11. The automatic control means 31 automatically controls the duty ratio of such a clock pulse by using the difference between the electric power obtained at the output of the analog circuit and the target value which is known under the pass band for the electric power as an operation amount. The duty ratio is set via the duty ratio changing means 32.

That is, the pass band of the analog circuit 11 is not provided in the pass band of the analog circuit 11 without installing the hardware for storing the duty ratio obtained in advance, such as the storage device constituting the electronic device according to the first aspect or the second aspect. The value of the adapted duty ratio is sequentially set, and the harmonic component of the clock pulse falling within the band is surely suppressed. In the electronic device according to the invention described in claim 4, the digital circuit 23
There is a possibility that the harmonic components of the clock pulse that operates in synchronization with each other are distributed in the pass band of the analog circuit 22, and the output means 21 included in such an analog circuit 22 outputs the distribution of frequency components in the pass band. .

On the other hand, the man-machine interface means 24
Is a man-machine interface for designating a duty ratio to be set in accordance with the distribution of the clock pulse, and the duty ratio is the duty ratio varying means 2
5 is set. Since the number of duty ratios to be set in this way is equal to the number of pass bands that the analog circuit 22 can take in accordance with its operation mode,
When the number is small, an extremely simple structure is achieved even if the storage means is mounted as in the inventions of claims 1 and 2 or the automatic control means is not mounted as in the invention of claim 3. The harmonic components that fall into the pass band efficiently are suppressed by the hardware of.

In the information processing apparatus according to the fifth aspect of the invention, the analog circuit 51 is arranged outside the information processing apparatus according to the present invention. However, analog circuit 5
1, the storage unit 53, the duty ratio selection unit 54, and the duty ratio variable unit 55 have the same functions as the analog circuit 11, the storage unit 13, the duty ratio selection unit 14, and the duty ratio variable unit 15 described in claim 1, respectively. Have. Further, the pass band monitoring unit 52 monitors and obtains the pass band of the analog circuit, and the pass band is referred to the storage unit 53 performed by the duty ratio selecting unit 54.

Therefore, in the information processing apparatus according to the present invention, the harmonic component of the clock pulse falling in the pass band of the analog circuit 51 described above is reliably reduced by adapting to the pass band.

In the information processing apparatus according to the sixth aspect of the present invention, the analog circuit 62 including the output means 61 is arranged outside the information processing apparatus according to the present invention. However, in addition to the output means 61 and the analog circuit 62, the storage means 63 and the man-machine interface means 64 are provided.
And the duty-ratio changing means 65 according to claim 2
It has the same functions as the output means 21, the analog circuit 22, the storage means 24, the man-machine interface means 25 and the duty ratio varying means 26 described in 1.

Therefore, in the information processing apparatus according to the present invention, the harmonic component of the clock pulse falling in the pass band of the analog circuit 62 described above is reliably reduced by adapting to the pass band. In the information processing apparatus according to the seventh aspect of the present invention, the analog circuit 51 is arranged outside the information processing apparatus according to the present invention. However, in addition to the analog circuit, the automatic control means 71 and the duty ratio varying means 73 have the same functions as the analog circuit 11, the automatic control means 31, and the duty ratio varying means 32 described in claim 3, respectively.

Therefore, in the information processing apparatus according to the present invention, the harmonic components of the clock pulse falling in the pass band of the analog circuit 51 described above are reliably reduced by adapting to the pass band. In the information processing equipment according to the invention described in claim 8, the analog circuit 6 including the output means 61.
2 is arranged outside the information processing device according to the present invention. However, in addition to the output means 61 and the analog circuit 62, the man-machine interface means 81 and the duty ratio varying means 82 are respectively the output means 21, the analog circuit 22, the digital circuit 23, and the man-machine described in claim 4. It has the same function as the interface means 24 and the duty ratio varying means 25.

Therefore, in the information processing apparatus according to the present invention, the harmonic component of the clock pulse falling in the pass band of the analog circuit 62 described above is adaptively reduced in the pass band.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 9 is a diagram showing a first embodiment corresponding to the invention described in claim 1. In FIG. The feeding end of the antenna 91 is connected to the input of the demodulator 92, and the output of the clock pulse oscillator 93 is connected to each unit in the wireless reception device according to the present embodiment via the duty ratio variable circuit 94. The control unit 95 has a memory 96 with a channel number given to its input, and is connected to the input of the duty ratio variable circuit 94.

Regarding the correspondence between this embodiment and the block diagram shown in FIG. 1, the demodulator 92 corresponds to the analog circuit 11, the duty ratio variable circuit 94 corresponds to the duty ratio variable means 15, and the control is performed. The unit 95 corresponds to the duty ratio selection means 14, and the memory 96 corresponds to the storage means 13. Hereinafter, the operation of this embodiment corresponding to the invention described in claim 1 will be described with reference to FIG.

The demodulator 92 receives the received wave of the radio channel corresponding to the channel number given from the outside, among the received waves arriving at the antenna 91. The memory 96 stores in advance such a channel number and a duty ratio described later corresponding to the channel number. The control unit 95
As described above, the memory 96 is referred to based on the channel number given from the outside, the duty ratio corresponding to the channel number is read, and the duty ratio is given to the duty ratio variable circuit 94.

The duty ratio variable circuit 94 sets the duty ratio of the clock pulse generated by the clock oscillator 93 to the duty ratio. By the way, for such a clock pulse, the waveform is rectangular and the angular frequency, the duty ratio, and the amplitude are ω, D, and A, respectively.
And the absolute value of the phase can be ignored, the harmonic component is

[Equation 1] Is represented by the Fourier series of.

That is, the harmonic component has a duty ratio D regardless of the order n, even if the angular frequency ω is constant.
The duty ratio to be stored in the memory 96 is calculated in advance as a value that minimizes the harmonic component of the clock pulse distributed in the reception band of the wireless channel indicated by each channel number. It is possible to

Further, since each unit operating in synchronization with the clock pulse operates at the rising edge (or falling edge) of the clock pulse, the operation timing can be maintained regardless of the duty ratio. is there. Therefore, according to the present embodiment, the harmonic component of the clock pulse falling in the reception band is suppressed and the demodulator 9
The S / N ratio of 2 is increased, and the built-in digital circuit operates stably without changing the operation timing.

Any known technique can be applied to the duty ratio variable circuit 94 as long as the precision, response, and characteristics are compatible, and therefore description thereof is omitted here. Further, in this embodiment, the optimum duty ratio is derived based on the Fourier series, but the calculation method is not limited to this, and the optimum duty ratio may be similarly obtained by actual measurement.

FIG. 10 is a diagram showing a second embodiment corresponding to the invention described in claim 1. In FIG. In the figure, the difference in configuration from the embodiment shown in FIG. 9 is that a clock pulse regenerating circuit 103 is provided in place of the clock pulse oscillator 93.

In this embodiment, the clock pulse reproduction circuit 103 takes in the received wave and reproduces the clock pulse,
The clock pulse pulse oscillator 93 shown in FIG. However, for such a clock pulse, the duty ratio can be varied by the duty ratio varying circuit 94 if the frequency is known regardless of the generation source.

Therefore, in this embodiment, as in the embodiment shown in FIG. 9, the harmonic components of the clock pulse falling into the reception band are suppressed, the S / N ratio of the demodulator 92 is increased, and the demodulator 92 is built in. The digital circuit operates stably without changing the operation timing. FIG.
It is a figure which shows 3rd embodiment corresponding to the invention of Claim 1.

In the figure, the difference from the embodiment shown in FIG. 9 is that a transceiver 112 is provided instead of the demodulator 92, and the output of the clock pulse oscillator 93 is transmitted / received via a duty ratio variable circuit 94. It is connected to 112. In the present embodiment, the clock pulse is the transmitter / receiver 11
2 and is used by the transmitter / receiver 112 to determine the timing for transmitting the transmission information.

However, for such a clock pulse, the frequency is generally given as a known value based on the transmission speed, and the duty ratio is changed by the duty ratio changing circuit 94. Therefore, in the present embodiment, similarly to the embodiment shown in FIG. 9, the harmonic component of the clock pulse falling into the reception band is suppressed, the S / N ratio of the transceiver 112 is increased, and the built-in digital circuit is provided. Then, it operates stably without changing the operation timing.

FIG. 12 is a diagram showing an embodiment corresponding to the invention described in claim 2. In FIG. In the drawing, components having the same functions and configurations as those shown in FIG. 9 are denoted by the same reference numerals, and description thereof is omitted here.

The difference between the present embodiment and the embodiment shown in FIG. 9 is that a control unit 125 is provided in place of the control unit 95, a speaker 122 is connected to the output of the demodulator 92, and the control unit 125 is connected. The point is that the switch 121 is connected to the input. Regarding the correspondence relationship between the present embodiment and the block diagram shown in FIG. 2, the demodulator 92 corresponds to the analog circuit 22, the speaker 122 corresponds to the output means 21, and the duty ratio variable circuit 94 changes the duty ratio. The control unit 125 and the switch 121 correspond to the man-machine interface unit 25, and the memory 96 corresponds to the storage unit 24.

The operation of this embodiment will be described below. The speaker 122 converts the demodulated signal output from the demodulator 92 into an acoustic signal and outputs the acoustic signal. However, when the high-order harmonic components of the clock pulse generated by the clock pulse oscillator 93 fall into the reception band, the Acoustic signals are accompanied by noise.
The switch 121 is provided as a man-machine interface that selects any one of several duty ratios stored in the memory 96.

The control unit 125 selects one of the duty ratios stored in the memory 96 under the man-machine interface and supplies it to the duty ratio variable circuit 94. However, since such a value of the duty ratio is calculated individually in advance by the demodulator 92 for all the wireless channels to be demodulated, the above-mentioned duty ratio value that minimizes the noise level is obtained. The frame of selection is determined by the number of radio channels for this.

Therefore, in this embodiment, the hardware configuration is simplified and the cost is reduced, the operability is maintained high, and the harmonic components of the clock pulse falling into the reception band of the demodulator 92 are surely ensured. Oppressed. FIG.
FIG. 6 is a diagram showing an embodiment corresponding to the invention described in claim 3.

In the figure, parts having the same functions and configurations as those shown in FIG. 9 are designated by the same reference numerals,
The description is omitted here. The difference between the present embodiment and the embodiment shown in FIG. 9 is that a control unit 135 is provided instead of the control unit 95 and the memory 96 is deleted. Regarding the correspondence between the present embodiment and the block diagram shown in FIG. 3, the demodulator 92 corresponds to the analog circuit 11, the duty ratio variable circuit 94 corresponds to the duty ratio variable means 32, and the control unit 135 It corresponds to the automatic control means 31.

The operation of this embodiment will be described below. In the situation where the harmonic component of the clock pulse generated by the clock pulse oscillation circuit 93 does not fall into the band of the demodulator 92, the control unit 135 uses the level of the demodulated signal obtained at the output of the demodulator 92 as a threshold value in advance. Is set. When the demodulator 92 is performing the demodulation process, the control unit 135 determines the magnitude relationship between the level of the demodulated signal obtained from the demodulator 92 and the threshold value described above.

Further, the control unit 135 determines that
If the former exceeds the latter, the duty ratio of the clock pulse is varied via the duty ratio varying circuit 94 to determine whether or not there is a correlation between the duty ratio and the level of the demodulated signal described above. . Further, when the control unit 135, as a result of the determination, recognizes that there is a correlation between the two, the control unit 135 sets the difference between them as the operation amount and sets the threshold value as the target value to set the duty ratio via the duty ratio variable circuit 94. By varying the duty ratio, the duty ratio is automatically controlled.

Therefore, according to the present embodiment, the clock pulse falling into the reception band of the demodulator 92 is not mounted without mounting the memory 96 unlike the embodiments corresponding to the inventions of claims 1 and 2. The harmonic components are surely suppressed. FIG. 14 is a diagram showing an embodiment corresponding to the invention described in claim 4.

In the figure, parts having the same functions and configurations as those shown in FIG. 12 are designated by the same reference numerals, and the description thereof will be omitted here. This embodiment and FIG.
The configuration is different from that of the embodiment shown in FIG. 6 in that the control unit 125 and the memory 96 are deleted, and a duty ratio operation unit 141 is provided instead of the switch 121.

Regarding the correspondence relationship between this embodiment and the block diagram shown in FIG. 4, the demodulator 92 corresponds to the analog circuit 22, the speaker 122 corresponds to the output means 21, and the duty ratio variable circuit 94 corresponds to. The duty ratio changing unit 42 corresponds to the duty ratio changing unit 42, and the duty ratio operating unit 141 corresponds to the man-machine interface unit 41. In this embodiment,
The duty ratio set via the duty ratio operation unit 141 is set to the clock pulse via the duty ratio variable circuit 94. Regarding the number of duty ratios to be set in this way, the demodulator 92 operates according to the operation. It is equal to the number of bands that can be provided depending on the form.

Therefore, in the present embodiment, when the number of the above-mentioned bands is small, the memory 96 is mounted as in the embodiments corresponding to the inventions of claims 1 and 2, or the memory 96 is installed. It is possible to efficiently suppress the harmonic component falling into the reception band of the demodulator 92 through the hardware having an extremely simple configuration even if the hardware for automatic control as in the invention described in 1) is not mounted. Becomes

FIG. 15 is a diagram showing an embodiment corresponding to the invention described in claim 5. In FIG. In the drawing, components having the same functions and configurations as those shown in FIG. 9 are denoted by the same reference numerals, and description thereof is omitted here. The difference between the present embodiment and the embodiment shown in FIG. 9 is that the clock pulse oscillator 93, the duty ratio variable circuit 94 and the control unit are provided in a personal computer separate from the wireless reception device including the antenna 91 and the demodulator 92. The channel determination unit 151 in addition to the control unit 155 and the memory 96 in place of 95
Is provided.

Regarding the correspondence relationship between the present embodiment and the block diagram shown in FIG. 5, the demodulator 92 corresponds to the analog circuit 51, the channel determination section 151 corresponds to the pass band monitoring means 52, and the control section. 155 corresponds to the duty ratio selection means 54, the memory 96 corresponds to the storage means 53, and the duty ratio variable circuit 94 corresponds to the duty ratio variable means 55.

Hereinafter, the operation of the present embodiment will be described. In the memory 96, the duty ratios individually adapted to the channel numbers are stored in advance as in the embodiment corresponding to the invention described in claim 1, and the channel determination unit 151 is set in the wireless receiving device installed outside. The acquired channel number is fetched and notified to the control unit 155. The control unit 155 refers to the memory 96 based on such a channel number to obtain the duty ratio adapted to the channel number and gives it to the duty ratio variable circuit 94.

Therefore, according to the present embodiment, the harmonic components of the clock pulse that fall into the reception band of the external radio receiver are suppressed, and the relative distance to the receiver, the installable position, the environment, etc. The restrictions related to are greatly reduced. FIG. 16 is a diagram showing an embodiment corresponding to the invention described in claim 6. In the figure, FIG.
Those having the same functions and configurations as those shown in are given the same reference numerals and their description is omitted here.

The difference between the present embodiment and the embodiment shown in FIG. 12 is that the antenna 91, the demodulator 92 and the speaker 1 are different.
This is that a clock pulse oscillator 93, a duty ratio variable circuit 94, a control unit 125, and a memory 96 are built in a personal computer separate from the wireless reception device composed of 22. Regarding the correspondence relationship between the present embodiment and the block diagram shown in FIG.
2, the speaker 122 corresponds to the output means 61,
The duty ratio changing circuit 94 is a duty ratio changing means 65.
The controller 125 and the switch 121 correspond to the man-machine interface means 64, and the memory 96 corresponds to the storage means 63.

In the present embodiment, the clock pulse oscillator 93, the duty ratio variable circuit 94, the control unit 125 and the memory 96 mounted on the personal computer, the antenna 91, the demodulator 92 and the speaker 122 mounted on the wireless reception device. With respect to the above, as described above, both have the same functions and configurations as those implemented in the embodiment according to claim 2, and the connection relationships between these components are also the same. A description of the operation of these components will be omitted.

Therefore, in the present embodiment, the duty ratio adapted to the channel number is surely selected, so that the radio receiving apparatus installed externally, as in the embodiment corresponding to the invention described in claim 5, is selected. The harmonic components of the clock pulse that fall into the reception band are suppressed, and the restrictions related to the relative distance to the reception device, the installable position, the environment, and the like are greatly reduced.

FIG. 17 is a diagram showing an embodiment corresponding to the invention described in claim 7. In FIG. In the figure, parts having the same functions and configurations as those shown in FIG. 13 are designated by the same reference numerals, and the description thereof will be omitted here. The difference between the present embodiment and the embodiment shown in FIG. 13 is that a clock pulse oscillator 93 is provided in a personal computer that is separate from the wireless reception device including an antenna 91 and a demodulator 92.
The duty ratio variable circuit 94 and the control unit 135 are incorporated.

Regarding the correspondence between this embodiment and the block diagram shown in FIG. 7, the demodulator 92 corresponds to the analog circuit 51, the duty ratio variable circuit 94 corresponds to the duty ratio variable means 73, and the control is performed. The section 135 corresponds to the automatic control means 71. In the present embodiment, the clock pulse oscillator 93, the duty ratio variable circuit 94, and the control unit 125 mounted on the personal computer, and the antenna 91 and the demodulator 92 mounted on the wireless reception device are all set as described above. Also, since the function and the configuration are the same as those implemented in the embodiment described in claim 3, and the connection relation between these components is also the same, the description regarding the operation of these components will be given here. Is omitted.

Therefore, in this embodiment, the duty ratio adapted to the reception band is surely set by the automatic control, and similarly to the embodiment corresponding to the invention described in claim 6, the radio receiving device installed outside is set. The harmonic components of the clock pulse that fall into the reception band of 1 are suppressed, and the restrictions on the relative distance to the receiving device, the installable position, the environment, and the like are significantly reduced.

FIG. 18 is a diagram showing an embodiment corresponding to the invention described in claim 8. In FIG. In the figure, parts having the same functions and configurations as those shown in FIG. 14 are designated by the same reference numerals, and the description thereof will be omitted here. The difference between the present embodiment and the embodiment shown in FIG. 14 is that a clock pulse oscillator 93 and a duty ratio variable circuit 94 are provided in a personal computer separate from a radio receiving device including an antenna 91, a demodulator 92 and a speaker 122. And the duty ratio operation unit 141 are built in.

Regarding the correspondence between this embodiment and the block diagram shown in FIG. 8, the demodulator 92 corresponds to the analog circuit 62, the speaker 122 corresponds to the output means 61, and the duty ratio variable circuit 94 corresponds to. The duty ratio changing unit 82 corresponds to the duty ratio operating unit 141, and the man-machine interface unit 81 corresponds to the duty ratio operating unit 141. In this embodiment,
Regarding the clock pulse oscillator 93, the duty ratio variable circuit 94 and the duty ratio operation unit 141 mounted in the personal computer, and the antenna 91, the demodulator 92 and the speaker 122 mounted in the wireless reception device,
As described above, both have the same functions and configurations as those implemented in the embodiment according to claim 4, and the connection relationships between these components are also the same.
Here, the description of the operation of these components will be omitted.

Therefore, in the present embodiment, the duty ratio adapted to the reception band is surely set through the hardware having an extremely simple structure, and like the embodiment corresponding to the invention described in claim 7, The harmonic components of the clock pulse that fall into the reception band of the wireless reception device installed in the receiver are suppressed, and the restrictions on the relative distance to the reception device, the installable position, the environment, and the like are significantly reduced.

In the embodiments shown in FIGS. 15 to 18, the number of personal computers installed adjacent to the radio receiver is limited to one, but a plurality of these information processing devices are installed in a narrow space. Even if installed, the same effect can be obtained. Further, in each of the above-described embodiments, it is possible to further increase the interference reduction effect by applying a known technique for shifting the frequency of the clock pulse or modulating the frequency of the clock pulse.

[0067]

As described above, the first to fourth aspects are provided.
According to the invention described in (1), while keeping the frequency of the clock pulse applied to the digital circuit constant, of the harmonic components of the clock pulse, the component falling into the pass band of the analog circuit is surely suppressed. Further, in the inventions according to claims 5 to 8, restrictions relating to a relative distance and a position of a place to be installed with respect to an electronic device in which an analog circuit is mounted are alleviated.

Therefore, in the electronic equipment and the information processing equipment to which these inventions are applied, the performance is maintained high, the reliability and the degree of freedom of the installation environment are greatly improved, and the efficiency of maintenance and operation is improved.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the invention according to claim 1;

FIG. 2 is a principle block diagram of the invention according to claim 2;

FIG. 3 is a principle block diagram of the invention according to claim 3;

FIG. 4 is a principle block diagram of the invention according to claim 4;

FIG. 5 is a principle block diagram of the invention according to claim 5;

FIG. 6 is a principle block diagram of the invention according to claim 6;

FIG. 7 is a principle block diagram of the invention according to claim 7;

FIG. 8 is a principle block diagram of the invention according to claim 8;

FIG. 9 is a diagram showing a first embodiment corresponding to the invention described in claim 1.

FIG. 10 is a diagram showing a second embodiment corresponding to the invention described in claim 1.

FIG. 11 is a diagram showing a third embodiment corresponding to the invention described in claim 1.

FIG. 12 is a diagram showing an embodiment corresponding to the invention described in claim 2.

FIG. 13 is a diagram showing an embodiment corresponding to the invention according to claim 3;

FIG. 14 is a diagram showing an embodiment corresponding to the invention according to claim 4;

FIG. 15 is a diagram showing an embodiment corresponding to the invention described in claim 5;

FIG. 16 is a diagram showing an embodiment corresponding to the invention described in claim 6;

FIG. 17 is a diagram showing an embodiment corresponding to the invention described in claim 7;

FIG. 18 is a diagram showing an embodiment corresponding to the invention described in claim 8;

[Explanation of symbols]

11,22,51,62 Analog circuit 12,23 Digital circuit 13,24,53,63 Storage means 14,54 Duty ratio selecting means 15,26,32,42,55,65,73,82 Duty ratio changing means 21 , 61 output means 25, 41, 64, 81 man-machine interface means 31, 71 automatic control means 52 pass band monitoring means 91 antenna 92 demodulator 93 clock pulse oscillator 94 duty ratio variable circuit 95, 125, 135 control section 96 memory 103 Clock pulse generation circuit 112 Transceiver 121 Switch 122 Speaker 141 Duty ratio operation unit 151 Channel determination unit 171 Signal input unit

Claims (8)

[Claims] 1. An electronic device comprising an analog circuit and a digital circuit which operates in synchronization with a clock pulse in which a harmonic component can be distributed in a pass band of the analog circuit. A storage unit that stores in advance a duty ratio that minimizes the harmonic components distributed in the pass band, and a duty that reads the duty ratio corresponding to the pass band by referring to the storage unit based on the pass band given from the outside. An electronic device comprising: a ratio selecting means; and a duty ratio changing means for setting the duty ratio of the clock pulse to the duty ratio read by the duty ratio selecting means. 2. An analog circuit having output means for outputting a distribution of frequency components in a pass band, and a digital circuit operating in synchronization with a clock pulse in which a harmonic component can be distributed in a pass band of the analog circuit. In the electronic device, a storage unit that stores in advance a duty ratio corresponding to the pass band and that minimizes the harmonic components distributed in the pass band; and a storage unit that stores the duty ratio in the storage unit based on an input command. And a duty ratio varying means for setting the duty ratio of the clock pulse to the duty ratio selected by the man-machine interface means. machine. 3. An electronic device comprising an analog circuit and a digital circuit which operates in synchronization with a clock pulse in which a harmonic component may be distributed in a pass band of the analog circuit, the electronic device being provided at an output end of the analog circuit. An automatic control unit that automatically controls the duty ratio of the clock pulse, using the difference between the electric power and a target value known under the pass band for the electric power as an operation amount, and a duty automatically controlled by the automatic control unit. An electronic device, comprising: a duty ratio varying means for setting a duty ratio of the clock pulse to a ratio. 4. An analog circuit having output means for outputting a distribution of frequency components in a pass band, and a digital circuit operating in synchronization with a clock pulse in which a harmonic component can be distributed in a pass band of the analog circuit. In the electronic device, a man-machine interface means for performing a man-machine interface relating to the designation of the duty ratio of the clock pulse, and a duty for setting the duty ratio of the clock pulse to the duty ratio designated via the man-machine interface means. An electronic device comprising: a ratio varying unit. 5. An information processing device which operates in synchronization with a clock pulse in which a harmonic component may be distributed in a pass band of an analog circuit arranged outside, in a pass band monitoring means for obtaining a pass band of the analog circuit, Corresponding to the pass band, a storage unit that stores in advance a duty ratio that minimizes the harmonic component distributed in the pass band, and a reference is made to the storage unit based on a pass band given from the outside, and the pass Information processing characterized by comprising: a duty ratio selecting means for reading a duty ratio corresponding to a band; and a duty ratio changing means for setting a duty ratio of the clock pulse to a value read by the duty ratio selecting means. machine. 6. An information processing device which is operated together with an analog circuit including an output means for outputting a distribution of frequency components in a pass band and which operates in synchronization with a clock pulse in which a harmonic component can be distributed in the pass band. For each aspect of the pass band, a storage unit that stores in advance a duty ratio that minimizes the harmonic component distributed in the pass band, and a man-machine interface that serves as a man-machine interface for designating the duty ratio of the clock pulse. Information processing equipment, and a duty ratio changing means for referring to a duty ratio stored in the storage means based on the designation and setting the duty ratio of the clock pulse to the duty ratio. . 7. An information processing device which operates in synchronization with a clock pulse in which a harmonic component can be distributed in a pass band of an analog circuit arranged outside, the electric power obtained at an output end of the analog circuit, and its electric power. Regarding the automatic control means for automatically controlling the duty ratio of the clock pulse with the difference from the target value known under the pass band as the operation amount, and the duty ratio of the clock pulse automatically controlled by the automatic control means. An information processing device, comprising: a duty ratio changing means for setting a duty ratio. 8. An information processing device which is operated together with an analog circuit including an output means for outputting a distribution of frequency components in a pass band and which operates in synchronization with a clock pulse in which a harmonic component can be distributed in the pass band, Man-machine interface means for performing a man-machine interface relating to designation of the duty ratio of the clock pulse, and duty ratio varying means for setting the duty ratio of the clock pulse to the duty ratio designated via the man-machine interface means. Information processing equipment characterized by the above.