CN2409729Y

CN2409729Y - Television set with radio

Info

Publication number: CN2409729Y
Application number: CN00222361U
Authority: CN
Inventors: 卢百舸
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-21
Filing date: 2000-02-21
Publication date: 2000-12-06
Anticipated expiration: 2010-02-21

Abstract

The utility model relates to a television set with a radio, which comprises a television set and a radio. The utility model is characterized in that the television set with a radio is provided with a mute signal buffer amplifier, an audio switching circuit which is composed of an L channel audio signal buffer, an R channel audio signal buffer and a CMOS analog switch, and a regulated power supply, wherein, the L channel audio signal buffer and the R channel audio signal buffer are identical. The input terminal of the mute signal buffer amplifier is connected with the mute signal output of a microprocessor of the television set. The input terminals of the L channel audio signal buffer and the R channel audio signal buffer are connected with the L channel audio output and the R channel audio output of the radio. The sound intermediate frequency signal output of the television set is connected with the input of an analog switch. The output terminal of the analog switch is connected with the input terminal of an audio frequency power amplifying circuit of the television set. The +18V working voltage and the +12V working voltage are respectively provided by a regulated power supply.

Description

Have wireless television set

The utility model relates to a kind of television set, particularly a kind ofly has a wireless television set.

At present, all television sets all are used for TV reception, piped program or make family's cinema system, each producer is when producing various new television models, still lay stress on the image definition that continues to improve television set, on color rendition degree and the acoustics, but with regard to television set itself, function ratio is more single, from self technology of television set, exist inborn defective-sound system can not separate fully with imaging system, even if the consumer has the possibility of only thinking the listening signal and not seeing television image, also must open picture tube simultaneously, this is a kind of waste of electric power, shortens the useful life of picture tube simultaneously again.The design of television set sound system is stereosonic, but owing to transmit, the stereophonic TV program is few, and this problem can not be resolved at short notice, and this also is a kind of waste of sound system, can't be fully used.

Thereby being to design, the purpose of this utility model a kind ofly when only listening to radio broadcasting, can not open the consumption of television picture tube conservation of power, reduce the picture tube loss, guarantee picture tube useful life, effectively utilize the sound system of television set, but not only rating television image but also listen radio broadcasting increases the wireless television set that has of the message pick-up amount of television set and propagation amount.

The purpose of this utility model is to realize like this, have wireless television set, comprise television set, broadcast receiver, it is characterized in that being provided with by the mute signal buffer amplifier, identical L, frequency switch circuit and stabilized voltage power supply that R channel audio signal buffer and cmos analog switch are formed, television set microprocessor mute signal output is connected with mute signal buffer amplifier input, wireless L, R channel audio signal output respectively with L, R channel audio signal buffer input connects, the accompanying sound intermediate frequency signal output of television set is connected with the cmos analog switch input, the output of cmos analog switch is connected with the input of the audio power amplifier circuit of television set, the input of stabilized voltage power supply is connected with AC power with the power supply inlet side of television set is in parallel, output+18V voltage is connected with the audio power amplifier circuit power end of television set, + 12V voltage is connected with the power end of broadcast receiver and frequency switch circuit, broadcast receiver places space in the television cabin, under television display screen, expose broadcast receiver wave band display screen, broadcast receiver mains switch K3, broadcast receiver volume control knob and broadcast receiver channel selection button, the lower rear of television set is equipped with broadcast receiver audio output.

Have wireless television set and can either not turn on the sound system that television set utilizes television set and play radio broadcasting by what the utility model provided, can under TV mute state only see television image not only but also can listen to radio broadcasting, can also operate like that by general television set and teleview, effectively utilized the sound system of television set, the message pick-up amount and the propagation amount of television set have been increased, cost is low, reduces power consumption, has guaranteed the useful life of picture tube.

The utility model has following accompanying drawing:

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of the utility model frequency switch circuit.

Fig. 3 is a structural representation of the present utility model.

Among the figure: the sub-11-battery main switch of 1-television set control panel 2-radio volume control knob 3-radio channel selection button 4-radio wave band display screen 5-radio power switch K3 6-TV set power switch K27-receiver of remote-control sytem 8-radio 9-television set 10-radio external delivery point K1 12-mute signal buffer amplifier 13-CMOS analog switch 14-voltage-stabilized power supply 15-television set microprocessor 16-television audio intermediate level circuit 17-tv audio power amplifier L, R-channel audio signal buffer

Embodiment of the present utility model is described with reference to the accompanying drawings.Have wireless television set as shown in Figure 1 and Figure 2, comprise television set 9, broadcast receiver 8, be provided with a frequency switch circuit and the stabilized voltage power supply 14 formed by mute signal buffer amplifier 12, identical L, R channel audio signal buffer and cmos analog switch 13, broadcast receiver 8 places space in television set 9 shells, be equipped with broadcast receiver mains switch K3, broadcast receiver wave band display screen and various button under television set 9 display screens, the lower rear of television set is equipped with broadcast receiver audio output.The mute signal buffer amplifier of frequency switch circuit is made up of diode D1, triode T1, resistance R 1-R5, capacitor C 1, C2, the negative terminal A of input D1 is connected with television set microprocessor mute signal output, and output R5 is connected with 11 pin of cmos analog switch IC2.The identical L of frequency switch circuit, R channel audio signal buffer are made up of triode T2, resistance R 6-R10, capacitor C 3-C5, negative terminal L, the R of input end capacitor C3 is connected with wireless L, the output of R channel audio signal respectively, and the R10 of output L, R sound channel is connected with 13,2 pin of cmos analog switch IC2 respectively.Input 1,12 pin of cmos analog switch IC2 in the frequency switch circuit are connected with the accompanying sound intermediate frequency signal output of television set, and R11, the C6 of

output

14,15 pin of cmos analog switch IC2 and negative terminal E, the F of C6, C7 among R12, the C7 are connected with the input of the audio power amplifier circuit of television set respectively.Stabilized voltage power supply is made up of transformer Tr, rectifier diode D2-D5, capacitor C 8,7812 three terminal regulator IC1, K switch 3, input is in parallel with TV set power, be connected with the alternating current 220V power supply through K switch 1, output one tunnel is connected with the working power input of broadcast receiver and frequency switch circuit through K3, and the input of one tunnel output through rectifier diode, IC2 and the common contact of C8 negative terminal are connected with the working power input of the audio power amplifier circuit of television set.It can provide to broadcast receiver and frequency switch circuit+operating voltage of 12V, also the audio power amplifier circuit to television set provides+operating voltage of 18V, making the operating voltage of the audio power amplifier circuit of television set can't help television set provides, guarantee all can work in any case, and the influence that is not subjected to whether to open television set.The front panel of tele-release machine is transferred and is provided with television set control panel 1, broadcast receiver volume control knob 2, broadcast receiver channel selection button 3, broadcast receiver wave band display screen 4, broadcast receiver mains switch 5 (K3), battery main switch 11 (K1), TV set power switch 6 (K2), receiver of remote-control sytem 7, television set rear portion and is provided with broadcast receiver external delivery point 10, as shown in Figure 3.

During use, energized master switch K1, stabilized voltage power supply 14 is started working, audio power amplifier circuit to television set provides+18V voltage, as connecting broadcast receiver mains switch K3 this moment, broadcast receiver and frequency switch circuit work, the broadcast receiver audio signal is input to the L in the frequency switch circuit, the audio number buffer of R sound channel, after amplifying, the T2 buffering delivers to 13 of cmos analog switch IC2CD4053B, 2 pin, because this moment, 11 pin of IC2 were high level, audio signal is sent to the tv audio power amplifier carries out exporting after the power amplification, emits the AM of radio broadcasting, the FM voice signal, realization is listened to the radio programme, picture not with the aid of pictures.As connecting TV set power switch K2 this moment, switch the mute button of television set, then share state for TV, radio reception, the television set display image signals, and voice signal is wireless audio signal through 13 pin of IC2 and 2 pin after the output of 14,15 pin, the audio power amplifier circuit of delivering to television set again carries out power amplification, realizes seeing that television image listens to radio broadcasting.For another example, cut off broadcast receiver mains switch K3 this moment, switch the mute button of television set again, mute signal is a low level state, and television set then is in normal operating condition, at this moment triode T1 conducting, 11 pin that make IC2 are low level, accompanying sound intermediate frequency signal from television set is carried out power amplification through 12 pin of IC2, the audio power amplifier circuit that the input of 1 pin is exported to television set through 14,15 pin of IC2, realizes only seeing TV, the independent television set function of not listening to the radio programme.

Claims

1. one kind has wireless television set, comprise television set, broadcast receiver, it is characterized in that being provided with by the mute signal buffer amplifier, identical L, frequency switch circuit and stabilized voltage power supply that R channel audio signal buffer and cmos analog switch are formed, television set microprocessor mute signal output is connected with mute signal buffer amplifier input, wireless L, R channel audio signal output respectively with L, R channel audio signal buffer input connects, the accompanying sound intermediate frequency signal output of television set is connected with the cmos analog switch input, the output of cmos analog switch is connected with the input of the audio power amplifier circuit of television set, the input of stabilized voltage power supply is connected with AC power with the power supply inlet side of television set is in parallel, output+18V voltage is connected with the audio power amplifier circuit power end of television set, + 12V voltage is connected with the power end of broadcast receiver and frequency switch circuit, broadcast receiver places space in the television cabin, under television display screen, expose broadcast receiver wave band display screen, broadcast receiver mains switch K3, broadcast receiver volume control knob and broadcast receiver channel selection button, the lower rear of television set is equipped with broadcast receiver audio output.

2. have a wireless television set by claim 1 is described, the mute signal buffer amplifier that it is characterized in that frequency switch circuit is made up of diode D1, triode T1, resistance R 1-R5, capacitor C 1, C2, the negative terminal A of input D1 is connected with television set microprocessor mute signal output, and output R5 is connected with 11 pin of cmos analog switch IC2.

3. have a wireless television set by claim 1 is described, the identical L, the R channel audio signal buffer that it is characterized in that frequency switch circuit are made up of triode T2, resistance R 6-R10, capacitor C 3-C5, negative terminal L, the R of input end capacitor C3 is connected with wireless L, the output of R channel audio signal respectively, and the R10 of output L, R sound channel is connected with 13,2 pin of cmos analog switch IC2 respectively.

4. have a wireless television set by claim 1 is described, input 1,12 pin that it is characterized in that the cmos analog switch IC2 in the frequency switch circuit are connected with the accompanying sound intermediate frequency signal output of television set, and R11, the C6 of output 14,15 pin of cmos analog switch IC2 and negative terminal E, the F of C6, C7 among R12, the C7 are connected with the input of the audio power amplifier circuit of television set respectively.

5. have a wireless television set by claim 1 is described, it is characterized in that said stabilized voltage power supply is made up of transformer Tr, rectifier diode D2-D5, capacitor C 8,7812 three terminal regulator IC1, K switch 3, input is in parallel with TV set power, be connected with the alternating current 220V power supply through K switch 1, output one tunnel is connected with the working power input of broadcast receiver and frequency switch circuit through K3, and the input of one tunnel output through rectifier diode, IC2 and the common contact of C8 negative terminal are connected with the working power input of the audio power amplifier circuit of television set.