JPS614331A - Transceiver device - Google Patents

Abstract

PURPOSE:To confirm call information even if a user leaves a transceiver body, by storing call information of the other party in a storage means only when a code which is stored in a reception-side memory set preliminarily coincides with the code transmitted from the other party. CONSTITUTION:Digital information of the control signal from a squelch 11 is converted to a digital signal by a MODEM14 and is sent to a microcomputer 15. When this signal coincides with a group number, the microcomputer 15 sets a synthesizer part 26 to the call channel set by the other party, and the call of the other party can be received. If a press talk switch 27 is not operated or this switch 27 cannot be operated because the user leaves the transceiver body, information of the other party is recorded on a memory 40 by the microcomputer 15. The call from the other party or the number of receptions is used as information recorded on the memory 40. A switch S1 is driven by the output level of the squelch 11, and the MODEM14 and the microcomputer 15 are driven by this switch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a transceiver device in which communication is possible only when the codes on the transmitting side and the receiving side match.

[Technical Background of the Invention] For example, personal radios, which have become popular in recent years, are examples of communication systems in which mutual communication is possible only when specific codes on the calling side and the receiving side match.

This personal radio will be explained below with reference to FIG.

First, regarding reception, a signal input from antenna 1 is sent to RF amplifier 3 by relay 2, where it is amplified. Next, it is input to the first mixer 4 and becomes the first local oscillation frequency. It is mixed with the output signal of the VCO 5 to form a first IF multiplied signal.

After this signal is amplified by the first IF amplifier 6, it is mixed with the output of the second 08C7 which oscillates at the second local oscillation frequency by the second mixer 8 to generate a second IF multiplied signal. After this IF multiplied signal is amplified by a second IF amplifier 9, a discriminator 10, a squelch 11, an amplifier 1
The received signal is reproduced by the speaker 13 via the receiver 2.

Further, the output of the squelch 11 is input to a mode demo 14 having a function of modulating or demodulating the control signal, and is converted into a digital signal. This signal is input to the microcomputer 15 to perform various operations to be described later according to the program.

Next, in the case of transmission, the audio signal input to the microphone 16 is first converted into an electrical signal and amplified by the microphone amplifier 17. And limiter 18, low pass filter 19
The attenuator 20 modulates the VCO 5, sets it to an appropriate level, and inputs the signal to the VCO 5 via the attenuator 20. This signal causes V
Modulate the output signal of CO5. The output signal of VCO5 is amplified by driver 21 and final 22, and then relay 2
is transmitted from antenna 1 via.

The VCO 5 includes a prescaler 23, PLt 24, and LPF.
25 constitutes a synthesizer section 26, which sets the frequency of transmission and reception.

By the way, in personal radio, one channel out of 80 is a control channel? It is sent wave number modulated. The remaining 79 channels are used for telephone calls and are phase modulated and sent.

The control channel includes a synchronization signal, a group number, and a calling channel number call code, and these are automatically sent as control signals from the other party's transceiver before communication becomes possible.

Here, the microcomputer 15 reads the call code and group number of a ROM cartridge (not shown) that stores the call code, specifies channels, transmits and receives control signals, operates when the breath talk switch 27 is activated, and displays the display 28.
It has functions to control transmission/reception timers, etc. As a result, the control signal transmitted from the other party reaches the modemo 14 via the squelch 11, and the MSK (minimum shift keying) modulated subcarrier of the other party is extracted from the received signal and the NRZ (non-return keying) modulated subcarrier is extracted from the received signal. The microcomputer 15 converts the two-zero signal into a digital signal and sends it out. Therefore, when the group number unique to the recipient written in the ROM cartridge matches, the synthesizer unit 26 is set to the communication channel designated by the recipient. As a result, by operating the breath talk switch 27, it becomes possible to talk to the other party.

Conversely, when calling a specific party, the party's group number is first determined and the breath talk switch 27 is operated. As a result, a control signal is transmitted from the microcomputer 15 to search for an empty channel, and the microcomputer 15 supports this empty channel so as to be synchronized with the other party's transceiver device, thereby making it possible to talk to the other party.

Note that 29 is a reception power supply section of the reception system 30, 31 is a transmission power supply section of the transmission system 32, and 33 is a common system power supply section of the transmission/reception common system 34. Further, the switch 5 is driven by a command from the microcomputer 15 by operating the breath talk switch 27, and selectively supplies the electric current rAB.

Further, the memory 35 is a so-called backup memory for storing information of the microcomputer 15, and is supplied with power from the common system power supply unit 33.

[Problems with Background Art] When a conventional transceiver device is set in a receiving state and a specific party calls, the user cannot recognize the call from a specific party when the transceiver device is located at a distance from the transceiver device.

[Object of the Invention] The present invention eliminates the above-mentioned problems and is equipped with an answering function that records call information from a specific party even when the transceiver device is away from the transceiver device.

[Summary of the Invention] The present invention is characterized in that when a code signal generated based on a different frequency is transmitted from the other party, and when it matches a preset code stored in the memory of the receiving side, the frequency specified by the other party is set. The transceiver device is equipped with a function that allows a call to be made with the other party only when the specific other party has received the call, and the transceiver device stores the calling information of the other party in the storage means only when the code matches the code set by the specific party. This allows the call information to be recognized by the M1 even when the user is away from the M1.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. In the figure, the same parts as in FIG. 2 are given the same numbers, and the explanation thereof will be omitted.゛In Fig. 1, in this embodiment, the digital information of the control signal from the squelch 11 is converted into a digital signal by the modem 14, and the microcomputer 1
It is sent on 5th. At this time, as described above, when the group number matches, the microcomputer 15 sets the synthesizer section 26 to the "call channel" set by the other party, and the other party's call can be received. At this time, the breath talk switch 2
If the user does not operate the breath talk switch 27 or is away from the transceiver body and cannot operate the breath talk switch 27, the microcomputer 15 records the other party's information in the memory 40. The information recorded in the memory 40 at this time may be the call itself from the other party or the number of times the call has been received.

Further, the switch S1 is driven by the output level of the squelch 11, and the mode demo 14 and the microcomputer 15 are thereby driven. Furthermore, the switches 82 and 83 are used in a standby state for operation, etc. when separated from the transceiver body.

That is, by turning off the switches S2 and $3, the microcomputer 15, amplifier 12, display 28, etc. are no longer supplied from the receiving system power supply 29.

Further, the switch S, which is turned on by the drive of the microcomputer 15, is also turned off, and power is not supplied to the transmission system 32 from the transmission photoelectric circuit [31]. However, the power IB is supplied to the receiving system 30 other than the common system power supply 33 and the amplifier 12. Further, power is also connected to the memory 35 of the microcomputer 15 from the common system power supply 33. Therefore, squelch 11
If the output level is above a predetermined level, the switch S1 is turned on. This ON operation drives the modem 14 and the microcomputer 15, and if the call is from a specific party, the microcomputer 15 stores the party's call information in the memory 40 as described above.

Therefore, when the transceiver device is powered by a battery, it is possible not only to reduce battery consumption during the standby state, but also to confirm a call from a specific party.

[Effects of the Invention] As described above, according to the transceiver device of the present invention, information about a call from a specific party can be stored. This makes it possible to confirm that.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention, and FIG. 2 is a conventional circuit configuration diagram. 11... Squelch 14...
・・・・・・Modemo 15・・・・・・・・・Microcontroller 26°・・・・
...Synthesizer section 35.40...Memory

Claims (1)

[Claims] When a signal coded based on a different frequency is transmitted from the other party, it is first received at a specific reception frequency, and when it matches the code stored in the memory of the receiver set in advance, the communication frequency specified by the other party is determined. In a transceiver device having a function that allows a call to be made to the other party only after setting, the calling information of the other party is stored in the storage means only when the code stored in the memory matches the code transmitted from the other party. 1. A transceiver device characterized in that call information can be confirmed even when the transceiver is separated from the transceiver main body.