CN2361040Y - Television sound device - Google Patents
Television sound device Download PDFInfo
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- CN2361040Y CN2361040Y CN 95215558 CN95215558U CN2361040Y CN 2361040 Y CN2361040 Y CN 2361040Y CN 95215558 CN95215558 CN 95215558 CN 95215558 U CN95215558 U CN 95215558U CN 2361040 Y CN2361040 Y CN 2361040Y
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Abstract
The utility model relates to a television sound device for televisions, which relates to functions of sound channels of the televisions and vocal accompaniment of Kara-OK. The utility model solves processed signal of the sound channels and combined vocal accompaniment of Kara-OK, interconnecting loop states do not influence each other, and conventional single audio signal has different stereo effect selections. The utility model is characterized in that two signals respectively solely or simultaneously enter a circuit of the back of a common point A to work together, an IC < 1 > is processed in a vocal accompaniment circuit of the Kara-OK or the sound channels, loop can independently work, frequency is adjusted to input a same IC < 5 >, and a power amplifier uses a low power member to form a low-voltage large power circuit structure. The utility model is mainly suitable for remote control television sets.
Description
This utility model relates to a kind of television set, particularly relates to a kind of television audio passage and has both the karaoke accompaniment function.
Used background technology file:
" radio ", Wang Rongyue, 21 pages, nineteen ninety o. 11th, the People's Telecon Publishing House.
" radio-cassette player television set integrated circuit replacement handbook ", Zhao Weibin, Yi Haiqiu, 232 pages,, scientific and technical literature publishing house in 1989.
" used as television data book of the integrated circuit ", Guo Yanling, Chen Xiaoli, 3-483～3-484 page or leaf,, Electronic Industry Press in 1992.
With the TA7680AP sound accompaniment circuit part in the design of the power discharging integrated block circuit in the application of the main time delay device principle in first background technology file, second the background technology file, the 3rd the background technology file, interpenetrating is applied to the purpose of this sound accompaniment device utility model.
This purpose is to have solved single audio signal behind the accompanying sound intermediate frequency signal frequency discrimination, when in this sound accompaniment device, regulating reverberation degree of depth potentiometer W3, having audio signal in the entire circuit audio signal loop simulates stereo, echo telepresenc and simulates stereo different-effect and select, and the karaoke accompaniment function is arranged again, and noise elimination, electronic sound volume are regulated circuit each function of loop that links to each other and are independent of each other.
This product sound accompaniment device by 1. sound accompaniment frequency discrimination and treatment circuit thereof 2. the two-way microphone signal regulate, amplifying circuit 3. audio frequency through connect signal and time delayed signal amplify 4. tone control of network processing circuitry, power amplifier 5. five parts such as power circuit form, circuit connecting relation is shown in Figure of description.
This utility model is compared beneficial effect with common sound accompaniment circuit; Its advantage is the signal of television field frame or karaoke accompaniment microphone, independent respectively signal transmission or while two paths of signals transmit together, the circuit function operate as normal that all is independent of each other, and obtain the above identical power amplifier of two-way or two-way, the mixed signal of amplification behind shared delay circuit, produce time-delay echo telepresenc signal, and the sense of acquisition spatial depth, strong sound Sensurround simulates stereo, and tone can be regulated, and regulate reverberation degree of depth potentiometer W3, this simulates the stereo different-effect selection that just has in entire circuit audio signal loop.
This Figure of description is circuit connecting relation figure.
Used integrated package model function is as follows:
IC
1Each the terminal pin 1. electronic sound volumes control of the sound accompaniment circuit part of TA7680AP integrated circuit; 2. negative feedback input; 3. audio frequency output; 4.; 20. power positive end; 21. sound intermediate frequency input; 22. sound intermediate frequency frequency discrimination coil; The electric capacity 23. postemphasis; 24. sound intermediate frequency frequency discrimination coil.
IC
2Each terminal pin 1. output 1 of TL084 high speed high resistance type four computing integrated circuit (IC)-components; 2. anti-phase 1; 3. homophase 1; 4. power supply+V; 5. homophase 2; 6. anti-phase 2; 7. export 2; 8. export 3; 9. anti-phase 3; 10. homophase 3; 11. power supply-V; 12. homophase 4; 13. anti-phase 4; 14. export 4.
IC
3Each terminal pin 1. ground of MN3207 time delay device; 2. clock 1; 3. input; 4. grid voltage input; 5. power supply; 6. clock 2; 7. export 1; 8. export 2.
IC
4Each terminal pin 1. power supply of MN3102 clock generating circuit device; 2. clock output 1; 3.; 4. clock output 2; 5. oscillator external connection end; 6. oscillator external connection end; 7. oscillator external connection end; 8. grid voltage output.
IC
5, IC
6Each terminal pin 1. output 1 of identical TDA2822M power discharging integrated block; 2. power supply; 3. export 2; 4.; 5. feed back 2; 6. import 2; 7. import 1; 8. feed back 1.
This sound accompaniment device is described as follows in conjunction with this Figure of description:
1. sound accompaniment frequency discrimination and treatment circuit thereof:
By ic chip
1Sound accompaniment circuit among the TA7680AP connects compositions such as computer plate CPU circuit, squelch circuit.The electronic sound volume control output end of computer plate CPU circuit links to each other with the squelch circuit output, connects resistance R 1 ground connection, isolation resistance R2, anti-dried anticapacitance C1 ground connection, and the C1 upper end connects resistance R 3 and connects IC
11 pin electronic sound volume control end, 1 pin voltage, 2～8V changes sound accompaniment audio signal size and the noise elimination effect controlled the outputs of 3 pin.Squelch circuit: when no TV signal, line flyback pulse signal voltage range value makes between the base stage of noise elimination triode BG203 and the emitter and is added with reversed bias voltage, collector voltage rises, affact 1 pin by conducting diode D203 and play the noise elimination effect: when TV signal is arranged, the amplitude magnitude of voltage of composite synchronizing signal is greater than the amplitude magnitude of voltage of line flyback pulse, make base stage and the emitter of noise elimination triode BG203 add positive bias-voltage, collector voltage descends, and diode D203 is by not influencing 1 pin voltage.The electronic sound volume control output end of computer plate CPU circuit, corresponding 1 pin that is added to IC1 of the size variation of output voltage makes 3 pin export corresponding signal amplitude and changes from small to big, and 2 pin connect negative feedback shunt capacitance C5 ground connection.4 pin ground connection, 20 pin power positive ends connect rectifier diode D1 and connect line output transformer FBT winding coil, and the D1 negative pole links to each other with filter capacitor C29.The related bandpass filter of 21 pin, as three end ceramic filter CF1, the frequency of the accompanying sound intermediate frequency signal of input is by used colour television standard decision, and as the CCIR-D/PAL standard that adopts, this frequency is 6.5MHZ.Connecting resistance R5,22 pin connect capacitor C 3 ground connection between 21 pin and 22 pin, 23 pin connect capacitor C 2 ground connection of postemphasising, meet parallel resistance R4, capacitor C 4, inductance L 1 between 22 pin and 24 pin and finish the sound accompaniment fm demodulation, the centre frequency of the resonant tank of inductance L 1, capacitor C 4 is identical with the frequency of three end ceramic filter CF1, and 3 pin output sound accompaniment audio signal connects high-frequency bypass capacitor C6 in parallel, resistance R 6 ground connection, meet isolation resistance R7, coupling capacitance C7 enters node A.
2. two-way microphone signal adjusting, amplifying circuit:
The circuit of another road signal is that the two-way microphone signal is regulated, amplifying circuit is a pre-amplification circuit before the node A.Microphone socket CK1, CK2 connects microphone signal regulator potentiometer W1 coupling capacitance C8 respectively, microphone signal regulator potentiometer W2 coupling capacitance C10, two road signals enter the base stage of high β value low noise triode BG19014 altogether, resistance R 10 is grounded emitter resistance, resistance R 8, capacitor C 9 cross-over connections in parallel are in base stage, it between the collector electrode negative feedback network, resistance R 9 is a collector load resistor, power supply from filter capacitor C21 through isolation resistance R12, capacitor C 12 ground connection, provide after the filtering, constitute the isolation resistance filter circuit, the signal after the amplification outputs signal to node A through coupling capacitance C11.
Network processing circuitry is amplified by 3. audio frequency through connect signal and time delayed signal in the loop of the signal shared circuit behind the node A, and 4. tone control, power amplifier etc. are formed.
3. audio frequency through connect signal and time delayed signal amplify network processing circuitry:
This part is by the computing ic chip
2The BBD device is IC in TL084, the delay circuit
3MN3207, clock generating circuit device are IC
4Circuit such as MN3102 are formed.IC
2Be high speed high resistance type four computing integrated package (IC
2-1, IC
2-2, IC
2-3, IC
2-4), the signal behind the node A is through amplitude limit resistance R 11 ground connection, through coupling capacitance C13, and input pickup resistance R14 is through IC
2-16 pin carry out signal frequency and mix to amplify, between 6 pin, 7 pin and connecting resistance R20, capacitor C 20 be feedback network, resistance R 13 and resistance R 15 dividing potential drops are IC
2In-phase end 5,10,12,3 pin bias voltage is provided, the filter capacitor in parallel with resistance R 15 is Cl4,7 pin connect coupling capacitance C22 output signal.Output divides two-way then: first via signal meets IC through coupling capacitance C23 by continuous respectively capacitor C 24 ground connection of connecting resistance R21, resistance R 25
2-29 pin, resistance R 24 meet IC
2-28 pin, 8 pin and 9 pin between meet capacitor C 26 and IC
2-2Form active low-pass filter, 4 pin connect power positive end and provide, constitute the isolation resistance filter circuit by capacitor C 29 after isolation resistance R26, capacitor C 21 ground connection, filtering, 11 pin ground connection, and from 8 pin output signals, signal enters IC in the delay circuit
33 pin audio signal input ends delay time 1 pin ground connection, 2 pin and IC
42 pin connect 4 pin and IC
48 pin capacitor C 36 ground connection that are connected, 5 pin and IC
41 pin after isolation resistance R30 connects shunt capacitance C33, C34 ground connection, filtering, provide, constitute the isolation resistance filter circuit from filter capacitor C29,6 pin and IC for common source anode, power supply
44 pin link to each other, 7 pin, 8 pin cross-over connection semifixed resistor W6, two ends are connecting resistance R34, R31 ground connection respectively, IC
43 pin ground connection, IC
45 pin external capacitor C35,6 pin outer meeting resistance R36 link to each other and 7 pin join, C35, R36 have determined IC
4Frequency of oscillation be IC
3Provide operate as normal necessary clock frequency, IC
37 pin, 8 pin output time-delay after signal through W
6Self-cleaning contact do one road signal output by capacitor C 15, enter the clock frequency composition and the high-frequency interferencing signal that contain in the low pass filter filters out audio signal, this low pass filter is made up of passive low ventilating filter and active low-pass filter.Resistance R 16 connect respectively capacitor C 16 to ground, resistance R 17, resistance R 17 connect respectively again capacitor C 17 to ground, resistance R 18, resistance R 18 again with connect the Node B of capacitor C 18 to ground, circuit is a passive low ventilating filter before this node.Enter active low-pass filter behind this node, by connect resistance R 19 link to each other respectively capacitor C 19 to ground, resistance R 22 meets IC
2-314 pin, resistance R 23 meet IC
2-313 pin, connect capacitor C 25,14 pin between 13 pin, 14 pin and be circuit such as output signal end and form.Output signal is divided two parts behind coupling capacitance C28 series resistor R27: a part heavily feeds back to active low-pass filter IC through resistance R 28, serial connection capacitor C 27
2-2The input of resistance R 25 in the circuit, and acquisition time delayed signal once more; Another part is through the self-cleaning contact of resistance R 29 to reverberation degree of depth potentiometer W3, and W3 and high-frequency bypass capacitor C31 lower end in parallel ground connection, the signal after the output time-delay send here through resistance R 32 with the second tunnel through connect signal through the W3 upper end and be mixed into IC mutually
2-4Circuit amplifies together, and input signal enters IC through coupling capacitance C30 series resistance R33
2-42 pin, between 2 pin and 1 pin and connect capacitor C 32, resistance R 35 and be feedback network, 1 pin connects coupling capacitance C37 output and mixes amplifying signal.
4. tone control, power amplifier:
The signal that mixes divides two-way to enter bass CONTROLLED POTENTIAL device W4 circuit, high pitch CONTROLLED POTENTIAL device W5 circuit through coupling capacitance C37 to carry out low, high-pitched tone and regulate, by resistance R 37 serial connection bass CONTROLLED POTENTIAL device W4, resistance R 38 ground connection, the self-cleaning contact of the W4 capacitor C 38 that links to each other respectively connects W4 upper end, capacitor C 39 and connects the self-cleaning contact that W4 lower end, isolation resistance R39 meet high pitch CONTROLLED POTENTIAL device W5, the last termination capacitor C 40 of W5, W5 lower end connect capacitor C 41 ground connection, constitute whole tone control circuit.Last signal is exported to divide two-way or enter identical power amplifier more than the two-way from the W5 self-cleaning contact and is comprised identical IC
5Power amplifier, identical IC
6Power amplifier, amplifying the back obtains telepresenc, simulates stereophonic effect, such as power amplifier (this example only draw two-way power amplifier), use integrated package TDA2822M, each integrated package all designs and is connected into the BTL circuit, such advantage, performance low-power device, the BTL circuit can obtain under lower supply voltage that bigger power output is fine to simulate stereophonic effect, and audio signal enters identical power discharging integrated block IC through resistance R 40, R42 (R41, R43) dividing potential drop
5, (IC
6) 7 pin amplify, meet negative feedback coupling capacitance C43 (C45) between 8 pin, 5 pin respectively, 5 pin meet feedback shunt capacitance C42 (C44) respectively, 4 pin, 6 pin ground connection, 2 pin link to each other, and to connect capacitor C 50 be filter capacitor to ground to power positive end, IC
5, (IC
6) 1 pin, 3 pin between signal output part meet loud speaker Y1, (Y2), two ends are connecting resistance capacitances in series network respectively, IC
51 pin meet capacitor C 47 series resistor R45 ground connection, IC
61 pin connecting resistance R47 serial connection capacitor C, 49 ground connection, IC
5, (IC
6) 3 pin connecting resistance R44, (R46) serial connection capacitor C 46, (C48) ground connection, constitute the output of guard amplifier final stage, prevent when it is too drastic breakdown.
5. power circuit:
The composition of this sound accompaniment device is sound accompaniment frequency discrimination and 2. two-way microphone signal adjusting of treatment circuit thereof 1., amplifying circuit 3. audio frequency through connect signal and the time delayed signal part power supply that amplifies network processing circuitry by the winding coil of line output transformer FBT through diode D1 rectification, the power sharing that provides after capacitor C 29 filtering, 4. tone control, power amplifier part power supply in the power amplifier is by being designed to pulse transformer coupling parallel connection type switching power supply, secondary winding coil from pulse transformer, through diode D2 rectification, capacitor C 50 filtered power supplys provide, and cold base plate is not with forceful electric power.More than design has guaranteed that the Karaoke socket is not with the safety of forceful electric power.
This sound accompaniment device entire circuit signal circuit is as follows:
During no TV signal, the squelch circuit control IC
1The noise elimination effect that raise of 1 pin voltage.Do not influence the independent operate as normal of Microphone for karaoke signal this moment.
When TV signal was arranged, signal was by IC
121 pin inputs, 22,23,24 pin and external circuits finish the sound accompaniment fm demodulation, volume is by the electronic sound volume control output end control IC of computer plate CPU circuit
1The size of 1 pin voltage, IC
1Interior electronic sound volume control circuit enters circuit node A along with the amplitude of the sound accompaniment audio signal output of 3 pin has been controlled in variation; Another road signal is the karaoke accompaniment microphone signal before the node A, by the microphone pre-amplification circuit that high β value low noise triode BG1 9014 forms, can connect simultaneously that two microphones are chorused easily or duet has also been established separately independently potentiometer W
1, W
2, easy to adjust, when accompanying without microphone, socket CK
1, CK
2Signal ground, do not influence the operate as normal of television audio signals circuit function yet, be the common circuit part behind the circuit node A, television field frame audio signal, microphone signal two road signals can both be distinguished or the while, enter circuit node A,, enter IC through capacitor C 23, resistance R 14
2-1Carry out signal frequency in the circuit and mix to amplify, divide a two-way from 7 foot meridian capacitor C22 output: first via signal through capacitor C 23, enter IC
2-2The circuit active low-pass filter makes from 8 pin output that the noise minimum enters IC the signal
33 pin input time delay device IC
3, IC
4Delay time in the circuit, through IC
37 pin, 8 pin output time-delay after signal do one tunnel output from the self-cleaning contact of W6, deliver to passive low ventilating filter and the IC that forms by R16, C16, R17, C17, R18, C18 through capacitor C 15
2-3In the circuit active low-pass filter, clock frequency composition and high-frequency interferencing signal in the filtering audio signal, mix mutually with the second tunnel through connect signal of sending here through resistance R 32 to the contacted W3 of the self-cleaning contact of reverberation degree of depth potentiometer W3 upper end through capacitor C 28, resistance R 27, R29 from the output of l4 pin, regulate W3 and make the variation of self-cleaning contact shift position in this resistance can obtain the different signal selection of mixed proportion: enter IC
2-4Amplifying circuit, through connect signal amplify the acquisition audio signal until tone control, power amplifier and simulate stereo; Meanwhile, if need mixed signal time-delay Echo, promptly from IC
2-3Select in the circuit output signal loop to take out some signals of delaying time, feed back to IC heavily again
2-2The input of resistance R 25 in the circuit active low-pass filter enters IC again
3The input of delayer, time-delay once more, thereby acquisition time delayed signal repeatedly are after IC
2-4Circuit amplifies the total mixed signal of output, enters tone control circuit through capacitor C 37, carries out dividing and making two-way or enter identical IC more than the two-way after low, high-pitched tone regulates through potentiometer W4, W5
5, IC
6Power amplifier amplifies acquisition echo (echo) telepresenc and simulates stereo.
Claims (6)
1, a kind of television audio device, form and comprise sound accompaniment frequency discrimination and treatment circuit thereof 1., the two-way microphone signal is regulated, amplifying circuit 2., 3. audio frequency through connect signal and time delayed signal amplify network processing circuitry, tone control, power amplifier 4., power circuit 5., it is characterized in that 1. sound accompaniment frequency discrimination and treatment circuit thereof regulate with the two-way microphone signal, amplifying circuit output signal 2. is connected in circuit node (A), 3. liaison regulation and control system of network processing circuitry is amplified by connecing audio frequency through connect signal and time delayed signal in the loop that enters the signal shared circuit behind the node (A), 4. power amplifier waits composition, its sound intermediate frequency through connect signal and time delayed signal amplify network processing circuitry 3. in the delay circuit of part, regulate reverberation degree of depth potentiometer W3, in entire circuit audio signal loop, having audio signal simulates stereo, the echo telepresenc simulates stereo selection, tone control, power amplifier 4. the part circuit in, through bass CONTROLLED POTENTIAL device W4, high pitch CONTROLLED POTENTIAL device W5 carries out low, signal after high-pitched tone is regulated is imported identical IC respectively
5Power amplifier, identical IC
6Power amplifier simulates stereo amplification, sound accompaniment frequency discrimination that this sound accompaniment device is formed and treatment circuit thereof are 1., the two-way microphone signal is regulated, amplifying circuit 2., audio frequency through connect signal and time delayed signal amplify network processing circuitry 3. the circuit power of part by the winding coil of line output transformer FBT through diode D1 rectification, the power sharing that provides after capacitor C 29 filtering, all be connected to the isolation resistance filter circuit between them, tone control, the power amplifier 4. circuit power of part is designed to secondary winding coil from pulse transformer through diode D2 rectification, capacitor C 50 filtered power supplys provide, and cold base plate is not with forceful electric power.
2, a kind of television audio device according to claim 1, it is characterized in that sound accompaniment frequency discrimination and treatment circuit thereof 1. in, IC
1Sound accompaniment circuit among the TA7680AP connects computer plate CPU circuit, squelch circuit, can make IC
1(1) pin voltage 2～8V change the sound accompaniment audio signal size and the noise elimination effect of the output of control (3) pin, output signal to circuit node (A); IC
1(21) pin connect three end ceramic filter CF1, the frequency of the accompanying sound intermediate frequency signal of this input input is by the colour television standard decision of using.
3, a kind of television audio device according to claim 1, it is characterized in that regulating at the two-way microphone signal, amplifying circuit 2. in, the socket CK of two-way karaoke accompaniment microphone
1, CK
2Signal, respectively through regulator potentiometer W
1Coupling capacitance C8, regulator potentiometer W
2Behind the coupling capacitance C10, enter altogether in the triode BG1 amplifying circuit and amplify, output signal to circuit node (A) through coupling capacitance C11; When accompanying without microphone, socket CK
1, CK
2Signal ground, do not influence the operate as normal of television audio signals circuit function yet.
4, a kind of television audio device according to claim 1, it is characterized in that audio frequency through connect signal and time delayed signal amplify network processing circuitry 3. in, enter signal behind the node (A), through amplitude limit resistance R 11 ground connection, signal through capacitor C 13, resistance R 14, enter IC
2The IC of TL084
2-1Carry out signal frequency in the circuit and mix to amplify, divide a two-way from (7) foot meridian capacitor C22 output: first via signal through capacitor C 23, enter IC
2-2The circuit active low-pass filter connects IC from the output of 8 pin
3(3) pin input time delay IC circuit
3MN3207, IC
4Delay time IC among the MN3102
37 pin, 8 pin output time-delay after signal do the output of one road signal through capacitor C 15 be connected R16, C16, R17, C17, passive low ventilating filter and IC that R18, C18 form through the self-cleaning contact of W6
2-3The circuit active low-pass filter, from (14) pin output time delayed signal through capacitor C 28,27 fens two parts of resistance R: a part heavily feeds back to IC through resistance R 28, capacitor C 27
2-2Resistance R 25 inputs in the circuit active low-pass filter; Another part mixes through the through connect signal that resistance R 32 is sent here through the upper end of resistance R 29 to the self-cleaning contact of reverberation degree of depth potentiometer W3 to W3 and the second tunnel that signal enters IC through capacitor C 30, resistance R 33 behind high-frequency bypass capacitor C31
2-4Amplify together in the circuit; Wherein regulating reverberation degree of depth potentiometer W3 makes the variation of self-cleaning contact shift position in this resistance can obtain the different signal selection of mixed proportion.
5, a kind of television audio device according to claim 1, it is characterized in that tone control, power amplifier 4. in, IC
5, IC
6The applied TDA2822M of power amplifier is designed to the BTL circuit and simulates stereo amplification in circuit.
6, a kind of television audio device according to claim 1, it is characterized in that the sound accompaniment frequency discrimination supplied with in 5. at power circuit and treatment circuit thereof 1., audio frequency through connect signal and time delayed signal amplify network processing circuitry 3., the two-way microphone signal regulates, amplifying circuit power circuit 2.: IC
1(20) pin and IC
3(5) pin meet IC
4(1) pin between be connected to isolation resistance R30, filter capacitor C33 in parallel, C34; IC
1(20) pin and IC
2(4) pin between be connected to isolation resistance R26, filter capacitor C21; Collector load resistor R9 and the IC of triode BG1
2(4) pin between be connected to isolation resistance R12, filter capacitor C12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215558 CN2361040Y (en) | 1995-06-22 | 1995-06-22 | Television sound device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95215558 CN2361040Y (en) | 1995-06-22 | 1995-06-22 | Television sound device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2361040Y true CN2361040Y (en) | 2000-01-26 |
Family
ID=33864880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95215558 Expired - Fee Related CN2361040Y (en) | 1995-06-22 | 1995-06-22 | Television sound device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2361040Y (en) |
-
1995
- 1995-06-22 CN CN 95215558 patent/CN2361040Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |