CN103151997A - High fidelity power amplifier - Google Patents
High fidelity power amplifier Download PDFInfo
- Publication number
- CN103151997A CN103151997A CN2013100850548A CN201310085054A CN103151997A CN 103151997 A CN103151997 A CN 103151997A CN 2013100850548 A CN2013100850548 A CN 2013100850548A CN 201310085054 A CN201310085054 A CN 201310085054A CN 103151997 A CN103151997 A CN 103151997A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- amplifier
- amplification circuit
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses a high fidelity power amplifier which comprises a preamplification circuit, an audio gain inverter circuit and a dual-audio power amplification circuit, wherein the audio gain inverter circuit comprises a third capacitor, a fourth capacitor, a fifth capacitor, a seventh capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a second amplifier, a third amplifier, a fourth amplifier, a transistor and a diode. The high fidelity power amplifier has the advantages of high amplification factor, good working stability, low distortion factor and the like.
Description
Technical field
The present invention relates to a kind of power amplifier, particularly relate to a kind of high-fidelity power amplifier.
Background technology
Along with making rapid progress and the fast development of electronic technology of development in science and technology, people are more and more higher to the demand of electronic product, the update of electronic product is also more and more faster, existing power amplifier can not adapt to the development of electronic information technology, how to study aly have that multiplication factor is high, good operating stability, high-fidelity power amplifier that the distortion factor is little become study hotspot.
Summary of the invention
The objective of the invention is to provide in order to address the above problem that a kind of multiplication factor is high, good operating stability, high-fidelity power amplifier that the distortion factor is little.
The present invention is achieved by the following technical solutions:
a kind of high-fidelity power amplifier comprises pre-amplification circuit, audio gain negative circuit and dual-audio power amplification circuit, described audio gain negative circuit comprises the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 7th electric capacity, the 14 electric capacity, the 15 electric capacity, the 16 electric capacity, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the second amplifier, the 3rd amplifier, the 4th amplifier, transistor and diode, the first end of described the 4th resistance be connected the first end of the 5th resistance and connect, the first end of described the 5th resistance is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity respectively with the first end of described the 7th resistance be connected the electrode input end of the 3rd amplifier and be connected, the second end of described the 7th resistance respectively with the output of described the 3rd amplifier be connected the first end of the 8th resistance and be connected, the negative input of described the 3rd amplifier is connected with the first end of described the 6th resistance, the second end of described the 6th resistance respectively with the first end of described the 9th resistance, the first end of the 21 resistance, the first end of the 16 electric capacity, the first end of the 12 resistance be connected the first end of the 20 resistance and connect, the second end of described nine resistance is connected with the negative input of described the 4th amplifier, the electrode input end of described the second amplifier respectively with the first end of described the 4th electric capacity be connected the first end of the tenth resistance and be connected, the second end of described the tenth resistance respectively with the output of described the second amplifier be connected the first end of the 11 resistance and be connected, the second end of described the 11 resistance respectively with the first end of described the 13 resistance be connected the electrode input end of the 4th amplifier and be connected, the negative input of described the 4th amplifier is connected with the second end of described the 12 resistance, the output of described the 4th amplifier is connected with the first end of described the 14 resistance, the normal phase input end of described the 4th amplifier respectively with the second end of described the 20 resistance be connected transistorized emitter and be connected, described transistorized base stage respectively with the negative pole of described diode, the first end of the 15 electric capacity, the first end of the 14 electric capacity be connected the first end of the 19 resistance and connect, described transistorized collector electrode is connected with the second end of described the 19 resistance, the positive pole of described diode respectively with the second end of described the 14 electric capacity, the second end of the 15 electric capacity be connected the second end of the 16 electric capacity and connect.
further, described dual-audio power amplification circuit comprises the audio frequency amplification circuit, the 6th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11 electric capacity, the 12 electric capacity, the 13 electric capacity, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and loud speaker, the first end of described the 6th electric capacity respectively with the first end of described the 8th electric capacity be connected the 5th pin of audio frequency amplification circuit and be connected, the 6th pin of described audio frequency amplification circuit is connected with the first end of described the 9th electric capacity, the second end of described the 9th electric capacity is connected with the first end of described the 16 resistance, the second end ground connection of described the 16 resistance, the 7th pin of described audio frequency amplification circuit is connected with the first end of described the 12 electric capacity respectively, the second end of described the 12 electric capacity is connected with the first end of described the 17 resistance, the second end of described the 17 resistance respectively with the first end of described the 11 electric capacity, the first end of 15 resistance, the first end of 18 resistance be connected the 8th pin of audio frequency amplification circuit and connect, the second end of described the 11 electric capacity is connected with the tenth pin of described audio frequency amplification circuit, the second end of described the 15 resistance is connected with the first end of described the tenth electric capacity, the second end of described the tenth electric capacity is connected with the 12 pin of described audio frequency amplification circuit, the 11 pin of described audio frequency amplification circuit and described transistorized collector electrode be connected the second end of the 19 resistance and be connected.
further, described pre-amplification circuit comprises the first electric capacity, the second electric capacity, the first resistance, the second resistance, the 3rd resistance, the first amplifier, the first end of described the first electric capacity is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the first end of described the second resistance be connected the electrode input end of the first amplifier and be connected, the output of described the first amplifier respectively with the second end of described the second resistance be connected the first end of the second electric capacity and be connected, the negative input of described the first amplifier is connected with the first end of described the 3rd resistance.
The invention has the beneficial effects as follows:
The present invention is comprised of pre-amplification circuit, audio gain negative circuit and dual-audio power amplification circuit, and preamplifier state requires that higher input impedance is arranged, lower output impedance, bandwidth, noise is little; The audio gain negative circuit realizes lifting or the attenuation to input signal; The dual-audio power-amplifier stage is the major part of audio-frequency power amplifier, and its determines the size of power output, requires that delivery efficiency is high, power output is large.The present invention has that multiplication factor is high, good operating stability and the advantage such as the distortion factor is little.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and the specific embodiments:
as shown in Figure 1, high-fidelity power amplifier of the present invention comprises pre-amplification circuit, audio gain negative circuit and dual-audio power amplification circuit, described audio gain negative circuit comprises the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 7th capacitor C 7, the 14 capacitor C 14, the 15 capacitor C 15, the 16 capacitor C 16, the 4th resistance C14, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 19 resistance R 15, the 20 resistance R 20, the 21 resistance R 21, the second amplifier A2, the 3rd amplifier A3, the 4th amplifier A4, transistor VT and diode VD, the first end of described the 4th resistance R 4 be connected the first end of the 5th resistance R 5 and connect, the first end of described the 5th resistance R 5 is connected with the first end of described the 3rd capacitor C 3, the second end of described the 3rd capacitor C 3 respectively with the first end of described the 7th resistance R 7 be connected the electrode input end of the 3rd amplifier A3 and be connected, the second end of described the 7th resistance R 7 respectively with the output of described the 3rd amplifier A3 be connected the first end of the 8th resistance R 8 and be connected, the negative input of described the 3rd amplifier A3 is connected with the first end of described the 6th resistance R 6, the second end of described the 6th resistance R 6 respectively with the first end of described the 9th resistance R 9, the first end of the 21 resistance R 21, the first end of the 16 capacitor C 16, the first end of the 12 resistance R 12 be connected the first end of the 20 resistance R 20 and connect, the second end of described nine resistance R 9 is connected with the negative input of described the 4th amplifier A4, the electrode input end of described the second amplifier A2 respectively with the first end of described the 4th capacitor C 4 be connected the first end of the tenth resistance R 10 and be connected, the second end of described the tenth resistance R 10 respectively with the output of described the second amplifier A2 be connected the first end of the 11 resistance R 11 and be connected, the second end of described the 11 resistance R 11 respectively with the first end of described the 13 resistance R 13 be connected the electrode input end of the 4th amplifier A4 and be connected, the negative input of described the 4th amplifier A4 is connected with the second end of described the 12 resistance R 12, the output of described the 4th amplifier A4 is connected with the first end of described the 14 resistance R 14, the normal phase input end of described the 4th amplifier A4 respectively with the second end of described the 20 resistance R 20 be connected the emitter of transistor VT and be connected, the base stage of described transistor VT respectively with the negative pole of described diode VD, the first end of the 15 capacitor C 15, the first end of the 14 capacitor C 14 be connected the first end of the 19 resistance R 19 and connect, the collector electrode of described transistor VT is connected with the second end of described the 19 resistance R 19, the positive pole of described diode VD respectively with the second end of described the 14 capacitor C 14, the second end of the 15 capacitor C 15 be connected the second end of the 16 capacitor C 16 and connect.
described dual-audio power amplification circuit comprises audio frequency amplification circuit IC, the 6th capacitor C 6, the 8th capacitor C 8, the 9th capacitor C 9, the tenth capacitor C 10, the 11 capacitor C 11, the 12 capacitor C 12, the 13 capacitor C 13, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18 and loud speaker BL, the first end of described the 6th capacitor C 6 respectively with the first end of described the 8th capacitor C 8 be connected the 5th pin of audio frequency amplification circuit IC and be connected, the 6th pin of described audio frequency amplification circuit IC is connected with the first end of described the 9th capacitor C 9, the second end of described the 9th capacitor C 9 is connected with the first end of described the 16 resistance R 16, the second end ground connection of described the 16 resistance R 16, the 7th pin of described audio frequency amplification circuit IC is connected with the first end of described the 12 capacitor C 12 respectively, the second end of described the 12 capacitor C 12 is connected with the first end of described the 17 resistance R 17, the second end of described the 17 resistance R 17 respectively with the first end of described the 11 capacitor C 11, the first end of 15 resistance R 15, the first end of 18 resistance R 18 be connected the 8th pin of audio frequency amplification circuit IC and connect, the second end of described the 11 capacitor C 11 is connected with the tenth pin of described audio frequency amplification circuit IC, the second end of described the 15 resistance R 15 is connected with the first end of described the tenth capacitor C 10, the second end of described the tenth capacitor C 10 is connected with the 12 pin of described audio frequency amplification circuit IC, the 11 pin of described audio frequency amplification circuit IC and the collector electrode of described transistor VT be connected the second end of the 19 resistance R 19 and be connected.
described pre-amplification circuit comprises the first capacitor C 1, the second capacitor C 2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first amplifier A1, the first end of described the first capacitor C 1 is connected with the first end of described the first resistance R 1, the second end of described the first resistance R 1 respectively with the first end of described the second resistance R 2 be connected the electrode input end of the first amplifier A1 and be connected, the output of described the first amplifier A1 respectively with the second end of described the second resistance R 2 be connected the first end of the second capacitor C 2 and be connected, the negative input of described the first amplifier A1 is connected with the first end of described the 3rd resistance R 3.
Claims (3)
1. a high-fidelity value power amplifier, is characterized in that: comprise pre-amplification circuit, audio gain negative circuit and dual-audio power amplification circuit, described audio gain negative circuit comprises the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 7th electric capacity, the 14 electric capacity, the 15 electric capacity, the 16 electric capacity, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the second amplifier, the 3rd amplifier, the 4th amplifier, transistor and diode, the first end of described the 4th resistance be connected the first end of the 5th resistance and connect, the first end of described the 5th resistance is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity respectively with the first end of described the 7th resistance be connected the electrode input end of the 3rd amplifier and be connected, the second end of described the 7th resistance respectively with the output of described the 3rd amplifier be connected the first end of the 8th resistance and be connected, the negative input of described the 3rd amplifier is connected with the first end of described the 6th resistance, the second end of described the 6th resistance respectively with the first end of described the 9th resistance, the first end of the 21 resistance, the first end of the 16 electric capacity, the first end of the 12 resistance be connected the first end of the 20 resistance and connect, the second end of described nine resistance is connected with the negative input of described the 4th amplifier, the electrode input end of described the second amplifier respectively with the first end of described the 4th electric capacity be connected the first end of the tenth resistance and be connected, the second end of described the tenth resistance respectively with the output of described the second amplifier be connected the first end of the 11 resistance and be connected, the second end of described the 11 resistance respectively with the first end of described the 13 resistance be connected the electrode input end of the 4th amplifier and be connected, the negative input of described the 4th amplifier is connected with the second end of described the 12 resistance, the output of described the 4th amplifier is connected with the first end of described the 14 resistance, the normal phase input end of described the 4th amplifier respectively with the second end of described the 20 resistance be connected transistorized emitter and be connected, described transistorized base stage respectively with the negative pole of described diode, the first end of the 15 electric capacity, the first end of the 14 electric capacity be connected the first end of the 19 resistance and connect, described transistorized collector electrode is connected with the second end of described the 19 resistance, the positive pole of described diode respectively with the second end of described the 14 electric capacity, the second end of the 15 electric capacity be connected the second end of the 16 electric capacity and connect.
2. a kind of high-fidelity value power amplifier according to claim 1, it is characterized in that: described dual-audio power amplification circuit comprises the audio frequency amplification circuit, the 6th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11 electric capacity, the 12 electric capacity, the 13 electric capacity, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and loud speaker, the first end of described the 6th electric capacity respectively with the first end of described the 8th electric capacity be connected the 5th pin of audio frequency amplification circuit and be connected, the 6th pin of described audio frequency amplification circuit is connected with the first end of described the 9th electric capacity, the second end of described the 9th electric capacity is connected with the first end of described the 16 resistance, the second end ground connection of described the 16 resistance, the 7th pin of described audio frequency amplification circuit is connected with the first end of described the 12 electric capacity respectively, the second end of described the 12 electric capacity is connected with the first end of described the 17 resistance, the second end of described the 17 resistance respectively with the first end of described the 11 electric capacity, the first end of 15 resistance, the first end of 18 resistance be connected the 8th pin of audio frequency amplification circuit and connect, the second end of described the 11 electric capacity is connected with the tenth pin of described audio frequency amplification circuit, the second end of described the 15 resistance is connected with the first end of described the tenth electric capacity, the second end of described the tenth electric capacity is connected with the 12 pin of described audio frequency amplification circuit, the 11 pin of described audio frequency amplification circuit and described transistorized collector electrode be connected the second end of the 19 resistance and be connected.
3. a kind of high-fidelity value power amplifier according to claim 1, it is characterized in that: described pre-amplification circuit comprises the first electric capacity, the second electric capacity, the first resistance, the second resistance, the 3rd resistance, the first amplifier, the first end of described the first electric capacity is connected with the first end of described the first resistance, the second end of described the first resistance respectively with the first end of described the second resistance be connected the electrode input end of the first amplifier and be connected, the output of described the first amplifier respectively with the second end of described the second resistance be connected the first end of the second electric capacity and be connected, the negative input of described the first amplifier is connected with the first end of described the 3rd resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100850548A CN103151997A (en) | 2013-03-18 | 2013-03-18 | High fidelity power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100850548A CN103151997A (en) | 2013-03-18 | 2013-03-18 | High fidelity power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103151997A true CN103151997A (en) | 2013-06-12 |
Family
ID=48549902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100850548A Pending CN103151997A (en) | 2013-03-18 | 2013-03-18 | High fidelity power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103151997A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375926A (en) * | 2001-03-15 | 2002-10-23 | 布陆泰科株式会社 | Audio-frequency power amplifier apparatus and method thereof |
| CN2770224Y (en) * | 2004-12-16 | 2006-04-05 | 李文涛 | Audio frequency amplifier low-frequency gain control circuit |
| US20070152750A1 (en) * | 2005-12-30 | 2007-07-05 | Andersen Jack B | Digital PWM amplifier with simulation-based feedback |
| US20090231030A1 (en) * | 2008-03-17 | 2009-09-17 | Po-Yu Li | Audio power amplifier and a pre-amplifier thereof |
| CN203180854U (en) * | 2013-03-18 | 2013-09-04 | 成都龙腾中远信息技术有限公司 | High-fidelity power amplifier |
-
2013
- 2013-03-18 CN CN2013100850548A patent/CN103151997A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1375926A (en) * | 2001-03-15 | 2002-10-23 | 布陆泰科株式会社 | Audio-frequency power amplifier apparatus and method thereof |
| CN2770224Y (en) * | 2004-12-16 | 2006-04-05 | 李文涛 | Audio frequency amplifier low-frequency gain control circuit |
| US20070152750A1 (en) * | 2005-12-30 | 2007-07-05 | Andersen Jack B | Digital PWM amplifier with simulation-based feedback |
| US20090231030A1 (en) * | 2008-03-17 | 2009-09-17 | Po-Yu Li | Audio power amplifier and a pre-amplifier thereof |
| CN203180854U (en) * | 2013-03-18 | 2013-09-04 | 成都龙腾中远信息技术有限公司 | High-fidelity power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105375884A (en) | Loudspeaker box power amplification circuit | |
| CN203933898U (en) | A kind of VGA CARD is eliminated circuit and active noise reduction earphone | |
| CN203180854U (en) | High-fidelity power amplifier | |
| CN204334499U (en) | A kind of audio-frequency amplifier circuit | |
| CN203968069U (en) | The VHF frequency band signals amplifying circuit of a kind of pair of filtering | |
| CN104682892A (en) | Audio frequency amplifier used for computer speakers | |
| CN103151997A (en) | High fidelity power amplifier | |
| CN203563019U (en) | Power amplification circuit for loudspeaker box loudspeaker | |
| CN203984359U (en) | A kind of onboard audio power amplification circuit | |
| CN204721585U (en) | Receiver amplifier | |
| CN203225871U (en) | Simplified audio frequency amplification circuit | |
| CN203167252U (en) | Audio power overall-amplification circuit | |
| CN202663531U (en) | Power amplifier device with alt and bass adjustment | |
| CN203563016U (en) | Low-power-dissipation amplifier for mobile phones | |
| CN205039785U (en) | Portable instrument's power amplification circuit | |
| CN203120140U (en) | Audio amplification circuit with standby function | |
| CN204697021U (en) | A kind of multimedia active loundspeakers control circuit | |
| CN104300926A (en) | Audio power amplifier used for multimedia electronic equipment | |
| CN104639057A (en) | Audio amplification circuit provided with simple structure and used for computer | |
| CN203180831U (en) | Front stereophonic amplifier | |
| CN203027461U (en) | Audio module and audio player | |
| CN203491980U (en) | High-fidelity audio power amplification integrated circuit | |
| CN203563013U (en) | High-input-impedance amplifier for mobile phones | |
| CN203563022U (en) | Operational amplifier for mobile phone | |
| CN103475323A (en) | Power amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |