CN201210720Y - Circuit device implementing machine opening music of television set - Google Patents
Circuit device implementing machine opening music of television set Download PDFInfo
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- CN201210720Y CN201210720Y CNU2008203003209U CN200820300320U CN201210720Y CN 201210720 Y CN201210720 Y CN 201210720Y CN U2008203003209 U CNU2008203003209 U CN U2008203003209U CN 200820300320 U CN200820300320 U CN 200820300320U CN 201210720 Y CN201210720 Y CN 201210720Y
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Abstract
The utility model relates to processing technology of television audio, in particular to a circuit device for realizing the television startup music. The device is capable of realizing the television startup music while having low consumption cost. The device comprises a microprocessor and an audio power amplifying circuit, further comprising a multiplex RC integrated circuit, a signal amplifying circuit and a impedance matching circuit; the multiplex RC integrated circuit, the signal amplifying circuit and the impedance matching circuit are orderly connected with the audio power amplifying circuit,. The utility model reduces the manufacturing cost and is good for market sell magnifying and suitable for the manufacturer to volume-produce.
Description
Technical field
The utility model relates to the tv audio treatment technology, particularly a kind of circuit arrangement of realizing startup music of television.
Background technology
In order to improve the novelty of television set, aspect audiovisual, improve user's perception, existing a part of producer has increased the startup music function on the basis of television set original function, remind the user with beautiful interesting to listen to music, television set has been in the energising open state, and the prompting user appreciates the program source of television set connection and takes care.And the television set that possesses this startup music function in the market passes through the audio frequency dsp processor realization music signal output of special microprocessor chip internal substantially, this type of implementation is simply effective, but this special microprocessor chip cost is higher, is unfavorable for the market sale extension.Most is to use common microprocessor chip existing television set, the common microprocessor chip does not have the audio frequency dsp processor, therefore can't in start, realize music signal output, but the PWM on its chip (pulse-width modulation) port can be utilized, cooperate some peripheral circuits again, can realize the startup music of television function.This type of circuit arrangement does not also appear in the market.
The utility model content
At above-mentioned deficiency of the prior art, technical problem to be solved in the utility model is: a kind of circuit arrangement that can realize startup music of television cheaply equally is provided.
The technical scheme in the invention for solving the above technical problem is: realize the circuit arrangement of startup music of television, comprise microprocessor and audio power amplification module, also comprise multiple RC integrating circuit, signal amplification circuit, impedance matching circuit; Described microprocessor, multiple RC integrating circuit, signal amplification circuit, impedance matching circuit are connected successively with the audio power amplification module.
Described multiple RC integrating circuit comprises resistance R 1, resistance R 2, capacitor C 1, capacitor C 2 and capacitor C 3, and described resistance R 2 connects the pulse-width modulation mouth of microprocessor by resistance R 1; Capacitor C 1 one ends connect the node of resistance R 1 and resistance R 2, other end ground connection; Capacitor C 2 is in parallel with capacitor C 1; One end ground connection of capacitor C 3, the other end is connected with the non-earth terminal of capacitor C 1 by resistance R 2.
Described signal amplification circuit comprises triode Q1, resistance R 3, resistance R 5, capacitor C 7, capacitor C 8, inductance L 1 and power supply VCC; Described triode Q1 base stage connects the non-earth terminal of capacitor C 3, and its emitter is by resistance R 3 ground connection, and its collector electrode meets power supply VCC by resistance R 5 and inductance L 1; Capacitor C 8 positive poles connect the node of inductance L 1 and resistance R 5, its minus earth; Capacitor C 7 and capacitor C 8 parallel connections.
Described impedance matching circuit comprises triode Q2, resistance R 4, resistance R 6, capacitor C 4, capacitor C 5 and capacitor C 6, and the base stage of described triode Q2 connects the collector electrode of triode Q1 by resistance R 4, and capacitor C 4 cross-over connections are between the base stage and ground of triode Q2; The collector electrode of triode Q2 connects power supply VCC by inductance L 1, and its emitter is by resistance R 6 ground connection; Capacitor C 5 and resistance R 6 parallel connections; The emitter of triode Q2 connects the audio power amplification module by capacitor C 6.
The beneficial effects of the utility model are: reduced cost, helped the market sale extension.
Description of drawings
Fig. 1 is an embodiment circuit structure diagram of the present utility model.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
The square wave that the utility model utilizes the PWM port output duty cycle of CPU to change, again successively by multiple RC integrating circuit, signal amplification circuit, impedance matching circuit and audio power amplification module, finish the startup music function, do not need to increase DSP Audio Processing chip, reduced production cost, help the market sale extension.
Embodiment:
As shown in Figure 1, the circuit arrangement of the realization startup music of television in this example comprises microprocessor and audio power amplification module, also comprises multiple RC integrating circuit, signal amplification circuit, impedance matching circuit; Described microprocessor, multiple RC integrating circuit, signal amplification circuit, impedance matching circuit are connected successively with the audio power amplification module.Concrete, multiple RC integrating circuit comprises resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, capacitor C 3, and wherein resistance R 1 connects the PWM mouth of CPU, and resistance R 2 is connected in series with resistance R 1, the node of capacitor C 1 one terminating resistor R1 and resistance R 2, other end ground connection; Capacitor C 2 is in parallel with capacitor C 1; Capacitor C 3 one ends are connected other end ground connection by resistance R 2 with the non-earth terminal of capacitor C 1; Described signal amplification circuit is made up of triode Q1 and resistance R 3, resistance R 5, capacitor C 7, capacitor C 8, inductance L 1 and power supply VCC, wherein the base stage of triode Q1 connects the non-earth terminal of capacitor C 3, its emitter is by resistance R 3 ground connection, and its collector electrode is connected power supply VCC by the series arm of resistance R 5 and inductance L 1; Electrochemical capacitor C8 positive pole connects the node of inductance L 1 and resistance R 5, other end ground connection; Leaded Ceramic Disc Capacitor C7 is parallel to electrochemical capacitor C8 two ends; Described impedance matching circuit comprises triode Q2, resistance R 4, resistance R 6, capacitor C 5 and capacitor C 6, and wherein the base stage of triode Q2 connects the collector electrode of triode Q1 by resistance R 4, and capacitor C 4 cross-over connections are between the base stage and ground of triode Q2; The collector electrode of triode Q2 connects power supply VCC by inductance L 1, and its emitter is by resistance R 6 ground connection; Capacitor C 5 and resistance R 6 parallel connections; The collector electrode of triode Q2 connects the audio power amplification module by capacitor C 6.
Its operation principle is: the utility model mainly utilizes PWM (pulse-width modulation) mouth of microprocessor to have the working method of high level, low level, high resistant, utilize the timer in the microprocessor to control selected PWM mouth output high level and low level duration simultaneously, on this port, produce the square wave of certain frequency, behind the square wave process multiple integral RC circuit integration, be converted into the analog wave of amplitude and frequency change.For the signal to noise ratio that improves signal with to the driving force of late-class circuit, analog wave carries out signal gain through signal amplification circuit and amplifies, and wherein R3 is a DC feedback resistance, and resistance R 5 provides bias voltage for triode Q1.Signal enters the common collector impedance matching circuit of being made up of triode Q2, resistance R 4, resistance R 6, capacitor C 5, capacitor C 6 afterwards, this impedance matching circuit has guaranteed to provide enough driving forces for back level power audio amplifier circuit, wherein the emitter of triode Q2, resistance R 6, capacitor C 5 constitute feedback circuit, resistance R 4 is interstage coupling resistance, capacitor C 4 is an integral filtering electric capacity, and inductance L 1 is the power filter inductance.Enter the audio power amplification module after signal is come out by impedance matching circuit and amplify output, so just finished the startup music function of television set.
Circuit structure of the present utility model is not limited only to the foregoing description, and those skilled in the art is easy to according to foregoing description circuit of the present utility model be made improvements slightly, and it all belongs to protection range of the present utility model.
Claims (4)
- [claim 1] realizes the circuit arrangement of startup music of television, comprises microprocessor and audio power amplification module, it is characterized in that: also comprise multiple RC integrating circuit, signal amplification circuit, impedance matching circuit; Described microprocessor, multiple RC integrating circuit, signal amplification circuit, impedance matching circuit are connected successively with the audio power amplification module.
- The circuit arrangement of [claim 2] realization startup music of television according to claim 1, it is characterized in that: described multiple RC integrating circuit comprises resistance R 1, resistance R 2, capacitor C 1, capacitor C 2 and capacitor C 3, and described resistance R 2 connects the pulse-width modulation mouth of microprocessor by resistance R 1; Capacitor C 1 one ends connect the node of resistance R 1 and resistance R 2, other end ground connection; Capacitor C 2 is in parallel with capacitor C 1; One end ground connection of capacitor C 3, the other end is connected with the non-earth terminal of capacitor C 1 by resistance R 2.
- The circuit arrangement of [claim 3] realization startup music of television according to claim 2 is characterized in that: described signal amplification circuit comprises triode Q1, resistance R 3, resistance R 5, capacitor C 7, capacitor C 8, inductance L 1 and power supply VCC; Described triode Q1 base stage connects the non-earth terminal of capacitor C 3, and its emitter is by resistance R 3 ground connection, and its collector electrode meets power supply VCC by resistance R 5 and inductance L 1; Capacitor C 8 positive poles connect the node of inductance L 1 and resistance R 5, its minus earth; Capacitor C 7 and capacitor C 8 parallel connections.
- The circuit arrangement of [claim 4] realization startup music of television according to claim 3, it is characterized in that: described impedance matching circuit comprises triode Q2, resistance R 4, resistance R 6, capacitor C 4, capacitor C 5 and capacitor C 6, the base stage of described triode Q2 connects the collector electrode of triode Q1 by resistance R 4, and capacitor C 4 cross-over connections are between the base stage and ground of triode Q2; The collector electrode of triode Q2 connects power supply VCC by inductance L 1, and its emitter is by resistance R 6 ground connection; Capacitor C 5 and resistance R 6 parallel connections; The emitter of triode Q2 connects the audio power amplification module by capacitor C 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203003209U CN201210720Y (en) | 2008-03-10 | 2008-03-10 | Circuit device implementing machine opening music of television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203003209U CN201210720Y (en) | 2008-03-10 | 2008-03-10 | Circuit device implementing machine opening music of television set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210720Y true CN201210720Y (en) | 2009-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203003209U Expired - Fee Related CN201210720Y (en) | 2008-03-10 | 2008-03-10 | Circuit device implementing machine opening music of television set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201210720Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945205B (en) * | 2009-07-06 | 2012-05-30 | 厦门华侨电子股份有限公司 | Method for editing start-up music of television and television capable of editing start-up music |
| CN103220567A (en) * | 2013-03-21 | 2013-07-24 | 青岛海信信芯科技有限公司 | Method, system and television for playing television starting music |
-
2008
- 2008-03-10 CN CNU2008203003209U patent/CN201210720Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945205B (en) * | 2009-07-06 | 2012-05-30 | 厦门华侨电子股份有限公司 | Method for editing start-up music of television and television capable of editing start-up music |
| CN103220567A (en) * | 2013-03-21 | 2013-07-24 | 青岛海信信芯科技有限公司 | Method, system and television for playing television starting music |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20160310 |