CN2368235Y - Sound-accompaniment frequency-modulation radio emitting-receiving device for television set - Google Patents

Abstract

The utility model relates to a television sound frequency modulation radio transmitter / receiver for television sets, comprising a television sound radio transmitter and a radio reception stereophone. The utility model is characterized in that an input terminal of the television sound radio transmitter is electrically connected with channels of the television sets by a switch; the sound channels of the television sets are switched by the switch; in a better embodiment, the switch is a contact of a relay; a coil of the relay is arranged in a circuit of the remote control receiver. The remote control transmitter manipulates the coil of the relay to be switched on or off, and thereby, and thereby, the remote control switch of the sound channels of the television sets is realized. The stereophone of the utility model is used for watching TV, the work, the study, and the rest of other persons are not influenced.

Description

The emission of television audio FM radio set, receiver

The utility model relates to the acoustics of television set.

The sound accompaniment way of output of at present commercially available television set is all very single, promptly export by the loudspeaker of television set self, the sound of television set speaker is very big, for other nontelevised people in the certain limit, the sound accompaniment of television set is a kind of noise, influence other operate as normal of not seeing the TV people, study or rest so all can see in daily life, the people of TV under many occasions.

The purpose of this utility model is to overcome the above problems, and the emission of a kind of television audio FM radio set, receiver are provided technically, and no lead connects between its stereophone and the television set; Wear it and see that TV can not have influence on other people's work, study and rest.

The purpose of this utility model is achieved in that

The emission of television audio FM radio set, receiver include reflector and receiver, and it is characterized in that: this reflector is the television audio transmitting set, and this receiver is the radio reception stereophone;

The television audio transmitting set mainly is made up of ic chip 4, triode VT8, VT9 and peripheral capacitance-resistance sense components and parts; The parallel network that an input LIN of this reflector forms through resistance R 6 and capacitor C 9 is connected with the pin 1 of IC4 through capacitor C 12 again; The parallel network that another input RIN of this reflector forms through resistance R 5 and capacitor C 8, be connected with the pin 18 of IC4 through capacitor C 10 again; The pin 13 of IC4 is connected with the pin 12 of IC4 through resistance R 9, capacitor C 20; The pin 14 of IC4 is connected with the pin 12 of IC4 through resistance R 10, capacitor C 21; Be connected with the capacitance connecting three point type oscillator of capacitor C 22, C23, C25, inductance L 2 formations between the pin 9,10 of IC4, be connected with the inductance connecting three point type of resistance R 7, R8, triode VT7, inductance L 1, capacitor C 15, C16 formation on the pin 11 of IC4, the pin 7 of IC4 is connected with the base stage of triode VT8; The grounded emitter current potential of VT8, the collector electrode of VT8 is connected with the base stage of triode VT9 through capacitor C 27, inductance L 4 parallel networks; The grounded emitter current potential of VT9; The collector electrode of VT9 is through capacitor C 30, inductance L 7 earthing potentials; Pin 8 earthing potentials of IC4; Antenna T1 earthing potential;

The radio reception stereophone mainly is made of ic chip 5, IC6, IC7; Wherein the pin 1,2 of IC5 meets power supply E7 through capacitor C 32, C33 respectively, the pin 3 of IC5 is connected with the pin 4 of IC5 through capacitor C 36, the pin 5 of IC5 meets power supply E7 through the parallel network of capacitor C 34, C35, inductance L 9, the pin 6,7 of IC5 meets power supply E7 through capacitor C 37, C38 respectively, the pin 10 of IC5 is connected with pin 11 through capacitor C 45, the pin 13 of IC5 is connected with antenna T2 through capacitor C 43, and the pin 14 of IC5 is connected with the pin 8 of IC6 through capacitor C 41, C47; Pin 1 earthing potential of IC6, the pin 2 of IC6 are through capacitor C 55 earthing potentials, and the pin 4 of IC6 meets power supply E7, and the pin 5 of IC6 is connected with the pin 3 of IC7 through capacitor C 50, potentiometer W3; The pin 6 of IC6 is connected with the pin 2 of IC7 through capacitor C 49, potentiometer W4, pin 1,5,4 earthing potentials of IC7, the pin 8 of IC7 meets power supply E7, the pin the 6, the 7th of IC7, left and right audio signal output end, the pin 6 of IC7 is through resistance R 26, earphone horn Y4, capacitor C 52 earthing potentials, and the pin 7 of IC7 is through resistance R 25, earphone horn Y3, capacitor C 52 earthing potentials.

It also includes remote control transmitter, receiver of remote-control sytem, television audio censor key;

Described remote control transmitter mainly is made of ic chip 1 and triode VT1, VT2; Wherein: the pin 1,2 of IC1 is connected with power supply E1 through switch S 1, S2 respectively; Pin 9,11 earthing potentials of IC1, the pin 12 of IC1 is connected with pin 13 by crystal oscillator X1; The pin 14 of IC1 meets power supply E1, and the pin 10 of IC1 is that signal output part is connected with the base stage of triode VT1; The collector electrode of VT1 is connected with power supply E1, and the emitter of VT1 is connected with the base stage of triode VT2, and the collector electrode of VT2 is connected with power supply E1 through infrared light emitting diode PHD1, resistance R 3;

Described receiver of remote-control sytem mainly is made up of ic chip 2, IC3, triode VT3, VT4, VT5, VT6, relay J 1, J2; The pin 1 of IC2 is connected with earth potential by infrared receiver diode PHD2; The pin 2 of IC2 is connected with earth potential through capacitor C 3, resistance R 4; The pin 5 of IC2 meets power supply E2 through potentiometer W1, and the pin 7 of IC2 connects the pin 6 of IC3; Pin 1 earthing potential of IC3; The pin 2 of IC3 is connected with pin 3 by crystal oscillator X2; The pin 5,8 of IC3 meets power supply E2; The pin 16 of IC3 is connected with the base stage of triode VT3; The emitter of VT3 is connected with the base stage of VT4; The grounded emitter current potential of VT4; The collector electrode of VT3 is connected with power supply E2 with the coil that the collector electrode of VT4 all passes through relay J 1; The pin 15 of IC3 is connected with the base stage of triode VT5; The emitter of triode VT5 is connected with the base stage of triode VT6; The grounded emitter current potential of VT6; The collector electrode of VT5 is connected with power supply E2 with the coil that the collector electrode of VT6 all passes through relay J 2;

Mainly by normally-closed contact J1A, the normally opened contact J1B of relay J 1, the normally-closed contact J2A of relay J 2, normally opened contact J2B constitute described television audio censor key; Normally opened contact J1B, J2B are connected between two sound channels of television audio transmitting set input RIN, LIN and television set; Normally-closed contact J1A, J2A are connected between the loudspeaker of two sound channels of television set and television set.

The utility model has following positive beneficial effect:

1. no lead connects between stereophone of the present utility model and the television set; Can many set of headphones use simultaneously, a plurality of like this audiences can wear a plurality of earphones and watch a TV simultaneously, and can not have influence on other people's work, study and rest.

2. the also configurable infra-red remote control transmitter of the utility model, receiver, but the way of output of long-distance remote control Management Television machine sound accompaniment, like this, the user uses can be convenient.

3. no lead connects between stereophone of the present utility model and the television set; People and the distance between the television set of wearing earphone are clear with interior sound at 50 meters.

4. the utility model also can be used for can making several audiences listen to a plurality of different programs of televising in same room in the audiovisual systems such as meeting, teaching.

Now in conjunction with the accompanying drawings the utility model is described in further detail as follows with preferred embodiment.

Fig. 1 is an embodiment of the utility model remote control transmitter circuit;

Fig. 2 is an embodiment of the utility model receiver of remote-control sytem circuit;

Fig. 3 is an embodiment of the utility model television audio censor key circuit;

Fig. 4 is an embodiment of the utility model television audio transmitting set circuit;

Fig. 5 is an embodiment of the utility model radio reception stereophone circuit.

See also Fig. 1, remote control transmitter mainly is made up of ic chip 1, triode VT1, VT2, infrared light emitting diode PHD1; Ic chip 1 can adopt the integrated circuit (IC) chip of BA5101 model, and BA5101 is an infra-red remote control coding integrated circuit; Its pin 1 to 8 is the push button signalling input, and pin 9 is external power supply negative terminal or earth potential end, and pin 10 is the code signal output, pin 11 external power supply negative terminals or earth potential end, pin 12 to 13 external 455KHZ crystal oscillators, pin 14 external power supply anodes.Closing Switch S1, the pin 10 of IC1 just can be exported a string code signal, and this code signal is gone out by infrared light emitting diode PHD1 county of emission after triode VT1, VT2 two-stage are amplified.

See also Fig. 2, receiver of remote-control sytem mainly is made up of ic chip 2, IC3, triode VT3 to VT6, relay J 1, J2; IC2 can adopt the integrated circuit (IC) chip of CX20106 model, CX20106 is that infra-red remote control receives preposition amplification circuit, internal circuit comprises preamplifier, limiting amplifier, band pass filter, peak detector, shaping circuit etc., and the pin 1 of IC2 is the remote signal input, externally can directly be connected with infrared receiver diode PHD2; Pin 5 is circumscribed with potentiometer W1, changes the size of W1, can change the centre frequency of the band pass filter of IC2 inside, pin 2 external resistance R 4, a capacitor C 3, and the adjustable size that changes C3, R4 is put in order the gain of the preamplifier of IC2 inside.Remote control command signal after IC2 amplifies shaping is exported to 6 pin of ic chip 3 by the pin 7 of IC2, and IC3 can adopt the integrated circuit (IC) chip of BA502 model; BA502 is that infra-red remote control receives decoding circuit, can with the supporting use of BA5101.The pin 1 external ground potential end of BA502, pin 2, external crystal oscillator X2 between 3, pin 4,7 is empty pin, pin 5,8 external power supply anodes, pin 6 is the code signal input, pin 16 to 9 is corresponding with the input push button signalling of the pin 1 to 8 of BA5101 for the control signal output ends after deciphering, so switch S 1 among closed Fig. 1, infrared light emitting diode PHD1 just can launch a string encoded infrared signal, this signal is received by infrared receiver diode PHD2, amplify through IC2, shaping, give IC3 decoding after the filtering, decoding back control signal is by pin 16 outputs of IC3, control relay J1 action.In like manner, if switch S 2 among closed Fig. 1, then the control signal after the decoding is by pin 15 outputs of IC3, control relay J2 action.

See also Fig. 3, ic chip 8 is the audio-frequency power amplifier on the television audio passage, ROUT represents television set right-channel signals output, LOUT represents the left channel signals output of television set, Y1, Y2 represents the inner original loudspeaker of television set respectively, as Fig. 2 repeat circuit J1, during the coil no current of J2, J1, the normally-closed contact J1A of J2, the J2A closure, the sound accompaniment of television set is by loudspeaker Y 1, Y2 plays, when relay J 1, when in the coil of J2 electric current being arranged, its normally-closed contact J1A, J2A opens, normally opened contact J1B, the J2B closure, at this moment the audio signal of television set flows to the input LIN and the RIN of television audio transmitting set shown in Figure 4.

Please refer to Fig. 4, the preemphasis circuit that the right-channel signals of television audio signal is made up of through capacitor C 8, resistance R 5 input of RIN end, again through capacitor C 10, enter IC4 by the pin 18 of IC4, the preemphasis circuit that the left channel signals of television audio signal is made up of through resistance R 6, capacitor C 9 input of LIN end, enter IC4 through capacitor C 12 by the pin 1 of IC4 again, IC4 can adopt the integrated circuit (IC) chip of BA1404 model, BA1404 is the FM multiplex radiating circuit, be characterized in the integrated level height, peripheral cell is few, reliable and stable, power consumption is little.By IC4 pin 1,18 are coupled to the audio signal of BA1404 inside through the inner left side of BA1404, the R channel amplifier amplifies and carries out the balance modulation again, composite signal appears on the pin 14 of IC4, then with the pin 13 of IC4 on pilot signal pass through R9, C20, R10, the network mixing that C12 constitutes, enter the pin 12 of IC4 again, the pin 10 of IC4 is circumscribed with capacitor C 22, C23, C25, the capacitance connecting three point type oscillator that inductance L 2 constitutes, this oscillator provides radiofrequency signal for the IC4 internal circuit, this radiofrequency signal is carried out frequency modulation with the mixed frequency signal that enters from the pin 12 of IC4, signal behind the frequency modulation is by pin 7 outputs of IC4, capacitor C 19 is used to prevent radio-frequency (RF) FEEDBACK, shunt capacitance C24 among the figure, choke L3 is used to prevent that radiofrequency signal from entering power supply E5; The modulated frequency signal of pin 7 outputs of IC4, launch by antenna T1 through the two-stage high frequency power amplifier amplification back that triode VT8, VT9 form, wherein, capacitor C 27, inductance L 4 and triode VT8 form the parallel resonance power amplifier be IC4 the signal of pin 7 outputs carry out frequency-selecting and amplify, VT8 is operated in Class C, can improve emission effciency like this, capacitor C 30, inductance L 7 are formed filter network, behind the filtering second harmonic FM signal are launched by antenna T1.

See also Fig. 5, this FM signal receives through antenna T2, pin 13 by IC5 enters IC5, IC5 can adopt the integrated circuit (IC) chip of TDA7021 model, TDA7021 is the FM radio set receiving circuit, its internal circuit includes the radio frequency input circuit, frequency mixer, local oscillator, intermediate frequency amplifier, amplitude limiter, frequency detector, squelch circuit etc., IC6 can adopt the integrated circuit (IC) chip of TDA7040 model, IC7 can adopt the integrated circuit (IC) chip of TDA7050 model, TDA7040 is the FM multiplex decoding integrated circuit, TDA7050 is the dual-channel audio amplification circuit, TDA7040, TDA7050 is and the matching used integrated circuit (IC) chip of TDA7021, compound f-m stereo acoustical signal is from pin 14 outputs of TDA7021, deliver to the pin 8 of TDA7040, carry out stereo demodulation through the TDA7040 internal circuit, isolate a left side, right channel audio signal, and respectively by the pin 5 of TDA7040,6 outputs, then by the pin 2 of TDA7050,3 enter TDA7050 inside carries out the audio frequency amplification, signal after the amplification is by the pin 6 of TDA7050,7 outputs, give earphone horn Y4 respectively, Y3 promotes loudspeaker Y 4, the Y3 sounding.

Claims (2)

1. television audio FM radio set emission, receiver include reflector and receiver, and it is characterized in that: this reflector is the television audio transmitting set, and this receiver is the radio reception stereophone;

The television audio transmitting set mainly is made up of ic chip 4, triode VT8, VT9 and peripheral capacitance-resistance sense components and parts; The parallel network that an input LIN of this reflector forms through resistance R 6 and capacitor C 9 is connected with the pin 1 of IC4 through capacitor C 12 again; The parallel network that another input RIN of this reflector forms through resistance R 5 and capacitor C 8, be connected with the pin 18 of IC4 through capacitor C 10 again; The pin 13 of IC4 is connected with the pin 12 of IC4 through resistance R 9, capacitor C 20; The pin 14 of IC4 is connected with the pin 12 of IC4 through resistance R 10, capacitor C 21; Be connected with the capacitance connecting three point type oscillator of capacitor C 22, C23, C25, inductance L 2 formations between the pin 9,10 of IC4, be connected with the inductance connecting three point type of resistance R 7, R8, triode VT7, inductance L 1, capacitor C 15, C16 formation on the pin 11 of IC4, the pin 7 of IC4 is connected with the base stage of triode VT8; The grounded emitter current potential of VT8, the collector electrode of VT8 is connected with the base stage of triode VT9 through capacitor C 27, inductance L 4 parallel networks; The grounded emitter current potential of VT9; The collector electrode of VT9 is through capacitor C 30, inductance L 7 earthing potentials; Pin 8 earthing potentials of IC4; Antenna T1 earthing potential;

The radio reception stereophone mainly is made of ic chip 5, IC6, IC7; Wherein the pin 1,2 of IC5 meets power supply E7 through capacitor C 32, C33 respectively, the pin 3 of IC5 is connected with the pin 4 of IC5 through capacitor C 36, the pin 5 of IC5 meets power supply E7 through the parallel network of capacitor C 34, C35, inductance L 9, the pin 6,7 of IC5 meets power supply E7 through capacitor C 37, C38 respectively, the pin 10 of IC5 is connected with pin 11 through capacitor C 45, the pin 13 of IC5 is connected with antenna T2 through capacitor C 43, and the pin 14 of IC5 is connected with the pin 8 of IC6 through capacitor C 41, C47; Pin 1 earthing potential of IC6, the pin 2 of IC6 are through capacitor C 55 earthing potentials, and the pin 4 of IC6 meets power supply E7, and the pin 5 of IC6 is connected with the pin 3 of IC7 through capacitor C 50, potentiometer W3; The pin 6 of IC6 is connected with the pin 2 of IC7 through capacitor C 49, potentiometer W4, pin 1,5,4 earthing potentials of IC7, the pin 8 of IC7 meets power supply E7, the pin the 6, the 7th of IC7, left and right audio signal output end, the pin 6 of IC7 is through resistance R 26, earphone horn Y4, capacitor C 52 earthing potentials, and the pin 7 of IC7 is through resistance R 25, earphone horn Y3, capacitor C 52 earthing potentials.

2. television audio FM radio set emission as claimed in claim 1, receiver, it is characterized in that: it also includes remote control transmitter, receiver of remote-control sytem, television audio censor key;

Described remote control transmitter mainly is made of ic chip 1 and triode VT1, VT2; Wherein: the pin 1,2 of IC1 is connected with power supply E1 through switch S 1, S2 respectively; Pin 9,11 earthing potentials of IC1, the pin 12 of IC1 is connected with pin 13 by crystal oscillator X1; The pin 14 of IC1 meets power supply E1, and the pin 10 of IC1 is that signal output part is connected with the base stage of triode VT1; The collector electrode of VT1 is connected with power supply E1, and the emitter of VT1 is connected with the base stage of triode VT2, and the collector electrode of VT2 is connected with power supply E1 through infrared light emitting diode PHID1, resistance R 3;

Described receiver of remote-control sytem mainly is made up of ic chip 2, IC3, triode VT3, VT4, VT5, VT6, relay J 1, J2; The pin 1 of IC2 is connected with earth potential by infrared receiver diode PHD2; The pin 2 of IC2 is connected with earth potential through capacitor C 3, resistance R 4; The pin 5 of IC2 meets power supply E2 through potentiometer W1, and the pin 7 of IC2 connects the pin 6 of IC3; Pin 1 earthing potential of IC3; The pin 2 of IC3 is connected with pin 3 by crystal oscillator X2; The pin 5,8 of IC3 meets power supply E2; The pin 16 of IC3 is connected with the base stage of triode VT3; The emitter of VT3 is connected with the base stage of VT4; The grounded emitter current potential of VT4; The collector electrode of VT3 is connected with power supply E2 with the coil that the collector electrode of VT4 all passes through relay J 1; The pin 15 of IC3 is connected with the base stage of triode VT5; The emitter of triode VT5 is connected with the base stage of triode VT6; The grounded emitter current potential of VT6; The collector electrode of VT5 is connected with power supply E2 with the coil that the collector electrode of VT6 all passes through relay J 2;

Mainly by normally-closed contact J1A, the normally opened contact J1B of relay J 1, the normally-closed contact J2A of relay J 2, normally opened contact J2B constitute described television audio censor key; Normally opened contact J1B, J2B are connected between two sound channels of television audio transmitting set input RIN, LIN and television set; Normally-closed contact J1A, J2A are connected between the loudspeaker of two sound channels of television set and television set.

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