CN204031078U - A kind of high-fidelity BTL power amplification circuit be made up of TDA2009 - Google Patents
A kind of high-fidelity BTL power amplification circuit be made up of TDA2009 Download PDFInfo
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- CN204031078U CN204031078U CN201420411257.1U CN201420411257U CN204031078U CN 204031078 U CN204031078 U CN 204031078U CN 201420411257 U CN201420411257 U CN 201420411257U CN 204031078 U CN204031078 U CN 204031078U
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- operational amplifier
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- electric capacity
- tda2009
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Abstract
The utility model discloses a kind of high-fidelity BTL power amplification circuit be made up of TDA2009, it is characterized in that: comprise TDA2009, operational amplifier IC1A, operational amplifier IC1B, operational amplifier IC1C, operational amplifier IC1D, resistance R1-R21, electric capacity C1-electric capacity C15, loud speaker BL and voltage stabilizing didoe DW; The utility model BTL power amplification circuit is high, with low cost without the need to debugging, fidelity.
Description
Technical field
The utility model relates to power amplifying device, particularly a kind of high-fidelity BTL power amplification circuit be made up of TDA2009.
Background technology
Every year along with now social development, the use of electronic equipment is more and more general, the output of various electronic product is very large, , in analog circuit field, being widely used of power amplification circuit, and in the circuit board of electronic product, power amplification circuit is present in various circuit, but existing power amplifying device needs debugging, bring rolling up of workload, and existing power amplifying device fidelity is not high, there is the situation of dropout, therefore provide a kind of without the need to debugging, fidelity is high, BTL power amplification circuit with low cost just seems there is good economic benefit.
Summary of the invention
For above deficiency of the prior art, the purpose of this utility model is to provide a kind of without the need to the BTL power amplification circuit debugged, fidelity is high, with low cost.The technical solution of the utility model is as follows:
The high-fidelity BTL power amplification circuit be made up of TDA2009, comprises TDA2009, operational amplifier IC1A, operational amplifier IC1B, operational amplifier IC1C, operational amplifier IC1D, resistance R1-R21, electric capacity C1-electric capacity C15, loud speaker BL and voltage stabilizing didoe DW; Described electric capacity C1 is connected with resistance R1, and resistance R1 is connected with the input cathode of operational amplifier IC1A, and the input anode of operational amplifier IC1A is connected with resistance R3, the input cathode of described operational amplifier IC1A by resistance R2 with
The output of operational amplifier IC1A is connected, the output of described operational amplifier IC1A is successively by electric capacity C2, resistance R4, electric capacity C4 is connected with the input cathode of operational amplifier IC1C, described electric capacity C2 is by resistance R5, electric capacity C3 is connected with the input cathode of operational amplifier IC1B, the input cathode of described operational amplifier IC1B is connected with the output of operational amplifier IC1B by resistance R7, the input anode of operational amplifier IC1A is respectively by resistance R3, resistance R6 and resistance R3, the input anode of resistance R9 and operational amplifier IC1B, the input anode of operational amplifier IC1C is connected, the output of described operational amplifier IC1C is connected with the input cathode of operational amplifier IC1D by resistance R11, the input cathode of described operational amplifier IC1D is connected with the output of operational amplifier IC1D by resistance R13, the input cathode of described operational amplifier IC1B is connected with the output of operational amplifier IC1C by resistance R7, the output of described operational amplifier IC1C is by resistance R8, No. 1 pin of electric capacity C5 and TDA2009 is connected, No. 7 pins of TDA2009 are by electric capacity C9, resistance R16 ground connection, described TDA2009 is connected with loud speaker BL by electric capacity C12, resistance R17, No. 4 pins of TDA2009, No. 8 pins of TDA2009 are connected with loud speaker BL by electric capacity C13, resistance R18, described resistance R2 is connected with the emitter of triode VT by resistance R20, and the collector electrode of described triode VT is connected by electric capacity C14, electric capacity C15, voltage-stabiliser tube DW.
Further, described IC1 ~ IC4 selects TL084, and IC5 selects TDA2009; VT selects 2N5551 type silicon triode, and BL selects BL to select 8 Ω, 1W electrodynamic loudspeakers.
advantage of the present utility model and beneficial effect as follows:
After the utility model adopts operational amplifier IC1 to amplify (multiplication factor is determined by R1, R2), anti-phase amplification is done through IC2 in a road, and its gain is 1; Twice anti-phase amplification is done through IC3, IC4 in another road, and gain is still 1, its essence is that IC3, IC4 form the non-inverting amplifier that gain is 1 jointly, so hold what obtain to be two large equal and audio signals that phase place is contrary at the B end of IC2 and the C of IC4.These two anti-phase each other audio signals are added to dual-audio power amplification circuit IC(TDA2009 respectively by R9, C5 and R10, C6) 1. and 5. foot, these two inputs are homophase input and inverting input, therefore after power amplification is carried out in the inside of IC5, respectively from 10. pin and the 8. pin output of IC5, promote loud speaker BL.This power amplification circuit is high, with low cost without the need to debugging, fidelity.
accompanying drawing explanation
The high-fidelity BTL power amplification circuit figure that Fig. 1 the utility model preferred embodiment is made up of TDA2009.
Embodiment
The embodiment providing an indefiniteness below in conjunction with accompanying drawing is further elaborated the utility model.
With reference to described in Fig. 1, the high-fidelity BTL power amplification circuit be made up of TDA2009, comprises TDA2009, operational amplifier IC1A, operational amplifier IC1B, operational amplifier IC1C, operational amplifier IC1D, resistance R1-R21, electric capacity C1-electric capacity C15, loud speaker BL and voltage stabilizing didoe DW; Described electric capacity C1 is connected with resistance R1, and resistance R1 is connected with the input cathode of operational amplifier IC1A, and the input anode of operational amplifier IC1A is connected with resistance R3, the input cathode of described operational amplifier IC1A by resistance R2 with
The output of operational amplifier IC1A is connected, the output of described operational amplifier IC1A is successively by electric capacity C2, resistance R4, electric capacity C4 is connected with the input cathode of operational amplifier IC1C, described electric capacity C2 is by resistance R5, electric capacity C3 is connected with the input cathode of operational amplifier IC1B, the input cathode of described operational amplifier IC1B is connected with the output of operational amplifier IC1B by resistance R7, the input anode of operational amplifier IC1A is respectively by resistance R3, resistance R6 and resistance R3, the input anode of resistance R9 and operational amplifier IC1B, the input anode of operational amplifier IC1C is connected, the output of described operational amplifier IC1C is connected with the input cathode of operational amplifier IC1D by resistance R11, the input cathode of described operational amplifier IC1D is connected with the output of operational amplifier IC1D by resistance R13, the input cathode of described operational amplifier IC1B is connected with the output of operational amplifier IC1C by resistance R7, the output of described operational amplifier IC1C is by resistance R8, No. 1 pin of electric capacity C5 and TDA2009 is connected, No. 7 pins of TDA2009 are by electric capacity C9, resistance R16 ground connection, described TDA2009 is connected with loud speaker BL by electric capacity C12, resistance R17, No. 4 pins of TDA2009, No. 8 pins of TDA2009 are connected with loud speaker BL by electric capacity C13, resistance R18, described resistance R2 is connected with the emitter of triode VT by resistance R20, and the collector electrode of described triode VT is connected by electric capacity C14, electric capacity C15, voltage-stabiliser tube DW.
Here only give the circuit diagram of one of them passage, another passage is identical.Audio signal is from the A end input of circuit, and after operational amplifier IC1 amplifies (multiplication factor is determined by R1, R2), anti-phase amplification is done through IC2 in a road, and its gain is 1; Twice anti-phase amplification is done through IC3, IC4 in another road, and gain is still 1, its essence is that IC3, IC4 form the non-inverting amplifier that gain is 1 jointly, so hold what obtain to be two large equal and audio signals that phase place is contrary at the B end of IC2 and the C of IC4.These two anti-phase each other audio signals are added to dual-audio power amplification circuit IC(TDA2009 respectively by R9, C5 and R10, C6) 1. and 5. foot, these two inputs are homophase input and inverting input, therefore after power amplification is carried out in the inside of IC5, respectively from 10. pin and the 8. pin output of IC5, promote loud speaker BL.
Two, the selection of components and parts
IC1 ~ IC4 selects TL084, and IC5 selects TDA2009; VT selects 2N5551 type silicon triode, and BL selects BL to select 8 Ω, 1W electrodynamic loudspeakers; All the other devices, all without particular/special requirement, can be selected by chart display.
Three, making and adjustment method
Due to the versatility of this circuit design, therefore, two power amplification circuits that any OTL or OCL exports, can refute with poor B, C two ends of putting amplifier and connect, thus form BTL amplifier.If reader is interested in, RC attenuation type tone control circuit can also be inserted, better effect will be received.
These embodiments are interpreted as only being not used in restriction protection range of the present utility model for illustration of the utility model above.After the content of reading record of the present utility model, technical staff can make various changes or modifications the utility model, and these equivalence changes and modification fall into the utility model claim limited range equally.
Claims (2)
1. the high-fidelity BTL power amplification circuit be made up of TDA2009, is characterized in that: comprise TDA2009, operational amplifier IC1A, operational amplifier IC1B, operational amplifier IC1C, operational amplifier IC1D, resistance R1-R21, electric capacity C1-electric capacity C15, loud speaker BL and voltage stabilizing didoe DW, described electric capacity C1 is connected with resistance R1, resistance R1 is connected with the input cathode of operational amplifier IC1A, the input anode of operational amplifier IC1A is connected with resistance R3, the input cathode of described operational amplifier IC1A is connected with the output of operational amplifier IC1A by resistance R2, the output of described operational amplifier IC1A is successively by electric capacity C2, resistance R4, electric capacity C4 is connected with the input cathode of operational amplifier IC1C, described electric capacity C2 is by resistance R5, electric capacity C3 is connected with the input cathode of operational amplifier IC1B, the input cathode of described operational amplifier IC1B is connected with the output of operational amplifier IC1B by resistance R7, the input anode of operational amplifier IC1A is respectively by resistance R3, resistance R6 and resistance R3, the input anode of resistance R9 and operational amplifier IC1B, the input anode of operational amplifier IC1C is connected, the output of described operational amplifier IC1C is connected with the input cathode of operational amplifier IC1D by resistance R11, the input cathode of described operational amplifier IC1D is connected with the output of operational amplifier IC1D by resistance R13, the input cathode of described operational amplifier IC1B is connected with the output of operational amplifier IC1C by resistance R7, the output of described operational amplifier IC1C is by resistance R8, No. 1 pin of electric capacity C5 and TDA2009 is connected, No. 7 pins of TDA2009 are by electric capacity C9, resistance R16 ground connection, described TDA2009 is connected with loud speaker BL by electric capacity C12, resistance R17, No. 4 pins of TDA2009, No. 8 pins of TDA2009 are connected with loud speaker BL by electric capacity C13, resistance R18, described resistance R2 is connected with the emitter of triode VT by resistance R20, and the collector electrode of described triode VT is connected by electric capacity C14, electric capacity C15, voltage-stabiliser tube DW.
2. a kind of high-fidelity BTL power amplification circuit be made up of TDA2009 according to claim 1, is characterized in that: described IC1 ~ IC4 selects TL084, and IC5 selects TDA2009; VT selects 2N5551 type silicon triode, and BL selects BL to select 8 Ω, 1W electrodynamic loudspeakers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420411257.1U CN204031078U (en) | 2014-07-24 | 2014-07-24 | A kind of high-fidelity BTL power amplification circuit be made up of TDA2009 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420411257.1U CN204031078U (en) | 2014-07-24 | 2014-07-24 | A kind of high-fidelity BTL power amplification circuit be made up of TDA2009 |
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| Publication Number | Publication Date |
|---|---|
| CN204031078U true CN204031078U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420411257.1U Expired - Fee Related CN204031078U (en) | 2014-07-24 | 2014-07-24 | A kind of high-fidelity BTL power amplification circuit be made up of TDA2009 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105852803A (en) * | 2016-03-18 | 2016-08-17 | 夏士桀 | High-fidelity audio output circuit used for magnetic resonance vision transmission |
-
2014
- 2014-07-24 CN CN201420411257.1U patent/CN204031078U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105852803A (en) * | 2016-03-18 | 2016-08-17 | 夏士桀 | High-fidelity audio output circuit used for magnetic resonance vision transmission |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20150724 |
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| EXPY | Termination of patent right or utility model |