CN205453645U - Low distortion partial power amplifier - Google Patents
Low distortion partial power amplifier Download PDFInfo
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- CN205453645U CN205453645U CN201620202571.8U CN201620202571U CN205453645U CN 205453645 U CN205453645 U CN 205453645U CN 201620202571 U CN201620202571 U CN 201620202571U CN 205453645 U CN205453645 U CN 205453645U
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Abstract
The utility model relates to a low distortion partial power amplifier, including voltage amplifier, high pitch buffer amplifier, bass buffer amplifier, the audio frequency passes through voltage amplifier divide into two way independent voltage follower, this two way independent voltage follower is high pitch voltage follower and bass voltage follower respectively, high pitch voltage follower provides drive current for high pitch buffer amplifier to the output high pitch is through the high pitch terminal connection of independent audio amplifier line with the partial audio amplifier, bass voltage follower provides drive current for bass buffer amplifier to the output bass is through the bass terminal connection of independent audio amplifier line with the partial audio amplifier, voltage amplifier by voltage A power supply, high pitch buffer amplifier by the power supply of voltage B, bass buffer amplifier by the power supply of voltage C, and voltage A is greater than or equals voltage B approximately, voltage B is greater than voltage C, the utility model has the advantages of high power, and low distortion, the phase equalization is good.
Description
Technical field
This utility model belongs to the power amplifier techniques field of sound system, particularly relates to a kind of low distortion partial power amplifier being applicable to the place such as HIFI and Specialty Hi-Fi.
Background technology
The frequency-reducing type power amplifier of Patent No. 201120241137.8 originally, due to complexity, built-in frequency dividing is unfavorable for the concordance of the high-fidelity phase place in HIFI place, it is achieved the compatible difficult shortcoming of difficulty of getting up.
Additionally, the existence power of traditional power amplifier and the very difficult problem taken into account of the distortion factor, owing to tradition power amplifier is when playing audio frequency, high pitch is to be superimposed upon on the profile of low frequency, and once overload Xiao's wave distortion, is exactly the most significantly HFS, although it is the least to account for percentage ratio, but for high pitch, after what some was trickle is sheared, distortion is serious.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art to exist, and provides a kind of based on OCL power amplifier, thus obtains a kind of high power, and low distortion, the low distortion partial power amplifier that phase equalization is good.
The purpose of this utility model completes by following technical solution, including voltage amplifier, high pitch buffer amplifier, bass buffer amplifier, audio frequency is divided into the voltage follower of two-way independence by described voltage amplifier, and the voltage follower of this two-way independence is respectively high pitch voltage follower and bass voltage follower；High pitch voltage follower provides to high pitch buffer amplifier and drives electric current, and exports high pitch and be connected with the high pitch binding post of partial audio amplifier by independent audio amplifier line；Bass voltage follower provides to bass buffer amplifier and drives electric current, and exports bass and be connected with the bass binding post of partial audio amplifier by independent audio amplifier line；Described voltage amplifier is powered by voltage A, and high pitch buffer amplifier is powered by voltage B, bass buffer amplifier is powered by voltage C, and voltage A is more than or is more than voltage C close to (approximating) voltage B, voltage B.
In order to reduce cost, improving tonequality, in conjunction with traditional power amplifier, power supply A can obtain voltage A from power supply B through resistance or diode blood pressure lowering.At low power HIFI field high pitch buffer amplifier and bass buffer amplifier, it is possible to reduce one-level, the only second level.
As preferably, the final stage voltage amplification output of described voltage amplifier is by+A through resistance R1, voltage amplification final stage tube Q1, resistance R3, resistance R4, and voltage amplification final stage tube Q2, through resistance R2 to-A end；Wherein resistance R3, resistance R4 and power tube Q3 composition power tube drives bias voltage circuit；Resistance R5, power tube Q4 and resistance R6, power tube Q5 is that electric current drives the first order, is that the common first order of high pitch buffer amplifier and bass buffer amplifier drives simultaneously.
As preferably, the power supply of described high pitch buffer amplifier is supplied by+B and-B, and high pitch output is driven by the second level of resistance R7, power tube Q6, resistance R9, resistance R10, resistance R8, power tube Q8 composition high pitch current amplification circuit；Power tube Q7, resistance R11, resistance R12, the power tube Q9 composition high pitch electric current output third level；Wherein power tube Q6, power tube Q7 and power tube Q8, power tube Q9 forms high pitch buffer amplifier, is also voltage follower.
As preferably, the power supply of described bass buffer amplifier is powered by+C and-C, and bass exports by resistance R13, power tube Q10, resistance R15, resistance R16, resistance R14, power tube Q12 composition bass Current amplifier second level driving, power tube Q11, resistance R17, resistance R18, power tube Q13 composition bass Current amplifier third level output；Wherein power tube Q10, power tube Q11 and power tube Q12, power tube Q13 forms bass buffer amplifier, is also voltage follower.
As preferably, described voltage A is two different separated transformers from the transformator that voltage C is powered.
As preferably, on senior HIFI equipment, the transformator of the power supply of described voltage A and voltage C, and be two independent input AC plugs.
The beneficial effects of the utility model are:
1, can effectively reduce Xiao's wave distortion raising human ear and medium-high frequency is easily recognized the part of subtle difference；In actual applications, even if occurring that Xiao Bo display lamp lights, also can hear high pitch clearly, the distortion no longer caused by high pitch Xiao Bo, causing waveform to change the most greatly；
2, three grades of drivings, effectively reduce the pipe power consumption of voltage amplifier circuit, then are provided large driven current density by first order Current amplifier, and in voltage amplifier circuit, the stability of supply voltage determines tonequality；And this design considerably reduces voltage amplifier circuit operating current so that voltage amplifying part voltage is more stable, and precision is higher, it is reasonable to improve tone color；
3, have employed high pitch, bass independence audio amplifier line connected mode, can reduce interfering of high pitch and bass, improve high pitch tone color；And under tradition wall scroll audio amplifier line connected mode, be difficult to take into account high frequency and bass, for some tone colors, even occur in that the fever line of several ten thousand yuan.
Accompanying drawing explanation
Fig. 1 is signal processing block diagram of the present utility model.
Fig. 2 is implementing circuit figure of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model done detailed introduction: as shown in accompanying drawing 1,2, this utility model includes voltage amplifier, high pitch buffer amplifier, bass buffer amplifier, audio frequency is divided into the voltage follower of two-way independence by described voltage amplifier, and the voltage follower of this two-way independence is respectively high pitch voltage follower and bass voltage follower；High pitch voltage follower provides to high pitch buffer amplifier and drives electric current, and exports high pitch and be connected with the high pitch binding post of partial audio amplifier by independent audio amplifier line；Bass voltage follower provides to bass buffer amplifier and drives electric current, and exports bass and be connected with the bass binding post of partial audio amplifier by independent audio amplifier line；Described voltage amplifier is powered by voltage A, and high pitch buffer amplifier is powered by voltage B, bass buffer amplifier is powered by voltage C, and voltage A is greater than or approximately equal to voltage B, voltage B more than voltage C.Described voltage A is two different separated transformers from the transformator that voltage C is powered.
The final stage voltage amplification output of described voltage amplifier is by+A through resistance R1, voltage amplification final stage tube Q1, resistance R3, resistance R4, and voltage amplification final stage tube Q2, through resistance R2 to-A end；Wherein resistance R3, resistance R4 and power tube Q3 composition power tube drives bias voltage circuit；Resistance R5, power tube Q4 and resistance R6, power tube Q5 is that electric current drives the first order, is that the common first order of high pitch buffer amplifier and bass buffer amplifier drives simultaneously.
The power supply of described high pitch buffer amplifier is supplied by+B and-B, and high pitch output is driven by the second level of resistance R7, power tube Q6, resistance R9, resistance R10, resistance R8, power tube Q8 composition high pitch current amplification circuit；Power tube Q7, resistance R11, resistance R12, the power tube Q9 composition high pitch electric current output third level；Wherein power tube Q6, power tube Q7 and power tube Q8, power tube Q9 forms high pitch voltage follower.
The power supply of described bass buffer amplifier is powered by+C and-C, bass exports by resistance R13, power tube Q10, resistance R15, resistance R16, resistance R14, the power tube Q12 composition bass Current amplifier second level drives, power tube Q11, resistance R17, resistance R18, power tube Q13 composition bass Current amplifier third level output；Wherein power tube Q10, power tube Q11 and power tube Q12, power tube Q13 forms bass voltage follower.
This utility model can use the IC at integrated package to design power amplifier, it is possible to use in the field effect transistor of discrete component, circuit of transistor power amplifier, the occasion of field effect transistor.
Certainly, a Buffer output can be added again according to this operation principle, become three frequency division output power amplifier even four frequency dividing power output.
Power tube in Fig. 2 can also use multiple tube, field effect transistor etc., and principle is identical.
In conventional low cost circuit, voltage A and voltage B powers and can use same voltage, voltage A, voltage B power reguirements the most stable, supply voltage is higher than voltage C.The power supply of voltage C is by various ways, high efficiency, and dynamic electric voltage can be used to power.
HIFI field use be, voltage A use separated transformer power, transformators different from voltage C, prevent from interfering, improve tonequality, voltage B kind circuit can transformer-supplied same with voltage A, independent winding rectifying and wave-filtering.
In the case of HIFI applies, voltage C is also adopted by tradition Industrial Frequency Transformer.
On senior HIFI equipment, the transformator of power supply of voltage A and voltage C, and be that two independent input AC plugs are powered from independent private line access.
In specialty power amplifier application, voltage C uses dynamic switch supply voltage to power, or other dynamic power.
General power about 100W in civilian power amplifier, it is recommended that voltage A, voltage B are more than 56V, are namely equivalent to the power of traditional more than 200W, it is possible to reduce because, in the case of high-power, high pitch is superimposed upon on audio bass profile, cause high pitch distortion phenomenon.Voltage A, the supply voltage of voltage B preferably carried out above are designed for piezoelectric voltage by 3 times of general power output.
In specialty power amplifier uses, voltage A, voltage B supply voltage typically (positive and negative)+more than-100, high-power+-150-200V, caused distortion by Xiao Bo reducing treble portion in the case of high-power.Voltage that bass is powered uses dynamic power, typically by change+-8V to+-200V, automatically changes according to the size of music.
This utility model is not limited to above-mentioned embodiment, no matter making any change on its shape or material are constituted, every employing structure provided by the utility model designs, and is all a kind of deformation of the present utility model, is all considered as within this utility model protection domain.
Claims (6)
1. a low distortion partial power amplifier, including voltage amplifier, high pitch buffer amplifier, bass buffer amplifier, it is characterized in that: audio frequency is divided into the voltage follower of two-way independence by described voltage amplifier, the voltage follower of this two-way independence is respectively high pitch voltage follower and bass voltage follower；High pitch voltage follower provides to high pitch buffer amplifier and drives electric current, and exports high pitch and be connected with the high pitch binding post of partial audio amplifier by independent audio amplifier line；Bass voltage follower provides to bass buffer amplifier and drives electric current, and exports bass and be connected with the bass binding post of partial audio amplifier by independent audio amplifier line；Described voltage amplifier is powered by voltage A, and high pitch buffer amplifier is powered by voltage B, bass buffer amplifier is powered by voltage C, and voltage A is more than or is more than voltage C close to voltage B, voltage B.
Low distortion partial power amplifier the most according to claim 1, it is characterised in that: the final stage voltage amplification output of described voltage amplifier is by+A through resistance R1, voltage amplification final stage tube Q1, resistance R3, resistance R4, and voltage amplification final stage tube Q2, through resistance R2 to-A end；Wherein resistance R3, resistance R4 and power tube Q3 composition power tube drives bias voltage circuit；Resistance R5, power tube Q4 and resistance R6, power tube Q5 is that electric current drives the first order, is that the common first order of high pitch buffer amplifier and bass buffer amplifier drives simultaneously.
Low distortion partial power amplifier the most according to claim 1, it is characterised in that: the power supply of described high pitch buffer amplifier is supplied by+B and-B, and high pitch exports by resistance R7, power tube Q6, resistance R9, resistance R10, the second level of resistance R8, power tube Q8 composition high pitch current amplification circuit drives；Power tube Q7, resistance R11, resistance R12, the power tube Q9 composition high pitch electric current output third level；Wherein power tube Q6, power tube Q7 and power tube Q8, power tube Q9 forms high pitch buffer amplifier, is also voltage follower.
Low distortion partial power amplifier the most according to claim 1, it is characterized in that: the power supply of described bass buffer amplifier is powered by+C and-C, bass exports by resistance R13, power tube Q10, resistance R15, resistance R16, resistance R14, power tube Q12 composition bass Current amplifier second level driving, power tube Q11, resistance R17, resistance R18, power tube Q13 composition bass Current amplifier third level output；Wherein power tube Q10, power tube Q11 and power tube Q12, power tube Q13 forms bass buffer amplifier, is also voltage follower.
Low distortion partial power amplifier the most according to claim 1, it is characterised in that: described voltage A is two different separated transformers from the transformator that voltage C is powered.
Low distortion partial power amplifier the most according to claim 1, it is characterised in that: on senior HIFI equipment, the transformator of the power supply of described voltage A and voltage C, is two independent input AC plugs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620202571.8U CN205453645U (en) | 2016-03-16 | 2016-03-16 | Low distortion partial power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620202571.8U CN205453645U (en) | 2016-03-16 | 2016-03-16 | Low distortion partial power amplifier |
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| CN205453645U true CN205453645U (en) | 2016-08-10 |
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| CN201620202571.8U Active CN205453645U (en) | 2016-03-16 | 2016-03-16 | Low distortion partial power amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878867A (en) * | 2017-03-03 | 2017-06-20 | 广东欧珀移动通信有限公司 | Supply unit and power amplification system and audio frequency apparatus |
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2016
- 2016-03-16 CN CN201620202571.8U patent/CN205453645U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878867A (en) * | 2017-03-03 | 2017-06-20 | 广东欧珀移动通信有限公司 | Supply unit and power amplification system and audio frequency apparatus |
| CN106878867B (en) * | 2017-03-03 | 2019-08-09 | Oppo广东移动通信有限公司 | Power supply device and power amplification system and audio frequency apparatus |
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