JPS6030211A - Radio receiver - Google Patents

Abstract

PURPOSE:To make an automatic two-band channel selection with two switches by placing a storage means stored with a selected band in such a state that the 1st band is selected when a switch for selecting a specific station in the 1st band is operated. CONSTITUTION:The output (a) of a T-FF29 is inverted every time a switch 25 is pressed, so transistors (TR) 22 and 23 are turned on alternately to supply a current to an MW (medium wave range) reception part 16 and an UKW (ultra high frequency range) reception part 17 alternately, so that one of two bands is selected with this switch 25. The output (b) of a T-FF30 is inverted every time a switch 26 is pressed, and a processor 11 controls a local oscillation part 18 when the output (b) is 1. At this time, the T-FF29 also has a set input, so it enters a state wherein the UKW band is selected forcibly; and the UKW reception part 17 is in operation and the local oscillation frequency is varied until a detecting circuit 19 detects a pilot signal for automatic channel selection.

Description

Detailed Description of the Invention Technical Field of the Invention The present invention relates to a radio receiver capable of receiving two bands and automatically selecting a specific broadcasting station within one of the two bands. Regarding the improvement of
More specifically, the present invention relates to a radio receiver in which the number of switches provided on the front operation section is reduced.

Conventional technology and problems In recent years, in West Germany, UKW (ULTRA KURZ)
WELLEN BEREICH) A VF that specializes in broadcasting traffic information using video (VERKEHR8FUN)
K) A traffic information system has been proposed in which radio receivers are provided with a function to automatically select VF stations. The VF station broadcasts by adding a 57 KHz pilot signal to the transmitted wave, so that it can be easily distinguished from other UKW stations by a radio receiver.

By the way, VF stations can be automatically selected, and UKW
Band and MW (MIT location WELLEN BEVEIC)
H) As shown in FIG. 1, six interlocking lock switches 1 to 3 are provided on the front operation section of a conventional radio receiver that can switch between bands for reception. Switch 1 is turned on when selecting the MW band,
Switch 2 is turned on when selecting the UKW band, and switch 6 is turned on when automatically selecting a VF station. As mentioned above, the conventional device has six interlocking switches 1 to 2 on the front operation section, and by operating these switches, the band is switched and the VF station is automatically selected. There were some drawbacks. That is, it is difficult due to space considerations to provide six interlocking switches 1 to 3 on the front operation section, which is equipped with many other operation switches (tuning switches, etc.), meters, etc.
Furthermore, since the mounting position is limited, there is a drawback that the freedom of design of the internal electronic equipment is limited.

OBJECTS OF THE INVENTION The present invention improves the above-mentioned drawbacks, and its purpose is to reduce the number of switches.

Examples will be described in detail below.

Embodiment of the Invention FIG. 2 is a block diagram of an embodiment of the invention, in which 11 is a microprocessor, 12 is a memory, 16 is a data input section, 14 is a data output section, 15 is an antenna, and 16 is a MW.
Receiver section, 17 is UKW receiver section, 1B is local oscillator section, 19
is a pilot signal detection circuit, 20 is a power switch, 21
are speakers, 22 and 2 are transistors, 24 is an inverter, 25 is a switch for switching between the MW band and the UKW band, 26 is a switch for selecting whether or not to automatically select a VF station, 27゜28 is the inverter, 29
, 30 is a tree flop, 61 to 66 are diodes,
34 is an inverter, 65-165-n is a channel selection switch,
66 and filter 7 are resistors, and 38 is a capacitor. Incidentally, the flip-flops 29 and 50 invert the output signal every time the signal applied to the terminal T becomes "1#", and when the signal applied to the set terminal S becomes "Z", the output signal becomes 1# and is reset. When the signal applied to the terminal R becomes "1#", the output signal becomes "0#".

When the power switch 20 is turned on, the output signal of the inverter 64 becomes '1#, and after a certain period of time, becomes "0#."

Therefore, when the power is turned on, the flip flop 29
, 50 output signals a and b both become "0", transistor 22 is turned on, transistor 26 is turned off, and M
Since the operating voltage is supplied to the W receiving section 16 via the transistor 22, it enters the MW band receiving state. When switch 25 is turned on in this state, inverter 2
Since the output signal of 7 becomes 1#, the flip-flop 29
The output signal a becomes I11#, which turns the transistors 22 and 23 off and on, respectively, and the operating voltage is supplied to the UKW receiving section via the transistor 23, so that the UKW band reception state is established. In addition, the output signal of Inno Kuichiyo 27 is sent to Solitsubflop 50.
Since it is added to the reset terminal 60 of
In this case, the output signal of the flip-flop 30 will be held at 0''.

The reception state of the MW band (the output of the flip-flop 29°30 (the g signals a and b are both “0”, and the MW receiving unit 16
When the switch f26 is turned on (in a state in which an operating voltage of 1 is supplied through the transistor 22), the output signal of the inverter 28 becomes 1'', and the output signal of the flip-flop 60 becomes 1''.

Since I = number 1'', flip-flop 2
9 is set, and its output signal a becomes 61'', which turns on the transistor 23 and causes the UKW receiver 17 to
A heavy operating force is supplied to the transistor 23 through the transistor 23. Also, the reception state of the UKW/
'', and the operating voltage is being supplied to the UKW receiver 17), when the switch 26 is turned on, the output signal of the inverter 28 becomes Chi1#, and the output signal of the flip-log 60 becomes Chi1#. No Iru.

Also, since the output (g) of the flip-flop 6o is applied to the set terminal S of the flip-flop 290, the control flop 29 outputs the output signal a as "
1'', thereby supplying the operating voltage to the UKW receiver section 17 via the transistor 23.

In this way, when the switch 26 is turned on when receiving the MW band or UKW band, the flip-flop 29°600
Both output signals a and b become @1#, and the UKW receiving section 17
An operating voltage is supplied to the transistor 2 through the transistor 2.

When the switch 26 is turned on, both the output signals a and b of the flip-props 2.9 and 30 become 1''.
The microprocessor 11 performs the processing described below.

That is, when the microprocessor 11 detects that the signals a and b applied via the data input section 13 are both 11111, the microprocessor 11 outputs the signals from the local oscillator 1 via the data output 14.
8 to sequentially change the frequency of the local oscillation signal applied from the local oscillation section 18 to a frequency converter (not shown) in the UKW reception section 17. The output signal of the UKW receiver 17 is always applied to the pilot signal detection circuit 19, and when a pilot signal with a frequency of 57 KHz is detected, the pilot signal detection circuit 19 sets its output signal "'c#" to "1".

When the microprocessor 11 detects that the signal C applied via the data input section 13 becomes "1", the microprocessor 11 outputs V
It is determined that station F has been selected, and the sending of the control signal to the local oscillation unit 18 is stopped, and the transmission of the control signal from the local oscillation unit 18 to the UKW reception unit 1 is performed.
The frequency of the local oscillation signal applied to the frequency converter in 7 is fixed to the frequency corresponding to the transmission frequency of the selected VF station.

In addition, the automatic tuning state of the VF station (clip flop 29
, 30 are both 1'' and the operating voltage is being supplied to the UKW receiver 17), when the switch 25 is turned on, the flip-flops 29 and 3 are turned on.
Both output signals a and b of 0 become 0#, and the state becomes a MW band reception state. In addition, in the automatic tuning state of the VF station,
When the switch 26 is turned on, the Noritsubu flop 29
, 30 output signals a and b become "1#" and "0", respectively, and enter the UKW band reception state.

DETAILED DESCRIPTION OF THE INVENTION As described above, the present invention provides a method for changing the reception band to either the first band (UKW punt in the embodiment) or the second band (UKW punt in the embodiment).
The first switch (switch 25 in the embodiment) selects which of the MW bands (MW band in the embodiment) and the switch 25 selects whether to automatically select a specific broadcast station such as a VF station. The second switch (switch 26 in the embodiment) that causes the first . A first flip-prop that remembers which of the second bands is selected (
In the embodiment, a flip-flop 29) and a second flip-flop (in the embodiment, a flip-flop 29) are used to store whether or not automatic tuning of a specific broadcasting station has been selected by operating the second switch. prop 30), and if the second flip-flop stores the selection of a specific broadcasting station, the first clip-flop stores the selection of the first band (in the embodiment). (signal line connecting the set terminal S of the flip-flop 290 and the output terminal Q of the flip-flop 60) and the first receiving section (in the embodiment, the signal line connecting the set terminal S of the flip-flop 60 and the output terminal Q of the flip-flop 60) 17), the second receiving section (MW receiving section 16 in the embodiment), an operating voltage supply means (in the embodiment, from the transistors 22, 23, and the inverter 24). ), and if the second flip-flop stores information for automatically selecting a specific broadcasting station, a tuning means for automatically selecting a specific broadcasting station (in the embodiment, a microprocessor 11,
(consisting of a local oscillation section 18 and a pilot signal detection circuit 19), there is an advantage that the number of switches provided on the front operation section can be reduced compared to the conventional example.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a conventional front operation section, and FIG. 2 is a configuration diagram of an embodiment of the present invention. 1 to 3, 25, 26, 35-1 to 65-n are switches,
11 is a microprocessor, 12 is a memory, and 16 is a data
data input section, 14 is a data output section, 16 is a MW reception section, 1
7 is a UKW receiver, 18 is a local oscillator, 19 is a pilot signal detection circuit, 2o is a power switch, 21 is a speaker, 22, 25 are transistors, 24, 27, 28
゜38 is an inverter, 29.50 is a flip-flop,
61 to 36 are diodes, 36.57 is a resistor, and 38 is a capacitor. Patent applicant Fujitsu Ten Ltd. agent Patent attorney Gobe Tamamushi (1 other person) Figure 1

Claims (1)

[Claims] a $1 receiving section that receives a first band; and a second receiving section that receives a second band;
．． By supplying the signal to either one of the second receiving sections, the first. In a radio receiver that can switch between two bands for reception and automatically select a specific broadcasting station within the first band, the reception band can be switched between the first and second bands. a first switch for selecting which one to tune to, a second switch for selecting whether to automatically tune to the specific broadcasting station; and a second switch to select whether to automatically tune to the specific broadcasting station. a first flip-flop that stores which of the second bands has been selected; and a second flip-flop that stores whether automatic tuning of the specific broadcasting station has been selected by operating the second switch. and a control means for storing that the first band has been selected in the first Fujitsubu flop when the second flip-flop stores that the specific broadcasting station is automatically selected. , the first flip-flop based on the storage contents of the first flip-flop. If one of the second receiving sections has an operating voltage supply means for supplying an operating voltage to the other, and the second flip-flop has a memory for automatically selecting the specific broadcasting station, the specific broadcasting station can be automatically selected. A radio receiver characterized in that it is equipped with a channel selection means for automatically selecting a channel.