CN206117993U - Audio frequency ground keeps apart differential circuit and audio amplifier - Google Patents
Audio frequency ground keeps apart differential circuit and audio amplifier Download PDFInfo
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- CN206117993U CN206117993U CN201621076063.6U CN201621076063U CN206117993U CN 206117993 U CN206117993 U CN 206117993U CN 201621076063 U CN201621076063 U CN 201621076063U CN 206117993 U CN206117993 U CN 206117993U
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Abstract
The utility model belongs to the technical field of sound box control circuit, especially, relate to an audio frequency ground keeps apart differential circuit and audio amplifier. The embodiment of the utility model provides an in, keep apart the differential circuit through increasing audio frequency ground on the AUX audio circuit current, added the isolation on audio frequency ground to converting difference signal input into, reaching stably with this, the audio quality of audio amplifier has been improved in the little audio input source of distortion.
Description
Technical field
This utility model belongs to audio amplifier control circuit technical field, more particularly to a kind of audio frequency ground isolating difference circuit and sound
Case.
Background technology
Audio amplifier refers to a kind of equipment that audio signal can be transformed to sound.Speaker main casing or low just refer in popular is said
Power amplifier is carried in sound receiver body, sound is played back out in itself by audio amplifier after process is amplified to audio signal so as to sound
The change of tune is big.
Current speaker products design, wired AUX audio signals input, and all of AUX audio signals, all it is
Single ended input, this design so that audio frequency bottom is made an uproar greatly, distortion is big, affects the audio curve and audio quality of audio amplifier entirety.
Utility model content
The purpose of this utility model embodiment is to provide a kind of audio frequency ground isolating difference circuit and audio amplifier, it is intended to solved existing
The AUX audio signals of audio amplifier be single ended input, there is a problem of audio frequency bottom make an uproar greatly, distortion it is big.
This utility model embodiment is achieved in that a kind of audio frequency ground isolating difference circuit, connects AUX audio signals respectively
End and power amplifier, audio frequency ground isolating difference circuit include：
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance
R10, inductance C1, inductance C2, inductance C3, inductance C4, inductance C5, inductance C6, the first amplifier U1 and the second amplifier U2；
The JACK_LEFT ends at the first termination AUX audio signals end of the inductance C1, second end of the inductance C1
The inverting input of first amplifier U1, the first termination AUX audio frequency letter of the inductance C2 are connect by the resistance R1
Number end JACK_GND ends, second end of the inductance C2 connects the homophase input of first amplifier U1 by the resistance R2
End, the first end of the output termination resistance R9 of first amplifier U1, second end of the resistance R9 passes through the electric capacity
C5 connects the power amplifier, and the two ends of the resistance R5 connect the second end of the first end and resistance R9 of the inductance C1, the electricity respectively
Resistance R6 is connected between the inverting input and outfan of first amplifier U1；
The JACK_RIGHT ends at the first termination AUX audio signals end of the inductance C4, the second of the inductance C4
End connects the inverting input of second amplifier U2, the first termination AUX audio frequency of the inductance C3 by the resistance R4
The JACK_GND ends of signal end, second end of the inductance C3 connect the homophase input of second amplifier U2 by the resistance R3
End, the first end of the output termination resistance R10 of second amplifier U2, second end of the resistance R10 passes through the electricity
Hold C6 and connect the power amplifier, the two ends of the resistance R8 connect the second end of the first end and resistance R10 of the inductance C4 respectively, described
Resistance R7 is connected between the inverting input and outfan of second amplifier U2.
The another object of this utility model embodiment is to provide a kind of audio amplifier, including AUX audio signals end and power amplifier, institute
Audio amplifier is stated also including the audio frequency ground isolating difference circuit for connecing the AUX audio signals end and power amplifier respectively, audio frequency ground isolation
Difference channel includes：
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance
R10, inductance C1, inductance C2, inductance C3, inductance C4, inductance C5, inductance C6, the first amplifier U1 and the second amplifier U2；
The JACK_LEFT ends at the first termination AUX audio signals end of the inductance C1, second end of the inductance C1
The inverting input of first amplifier U1, the first termination AUX audio frequency letter of the inductance C2 are connect by the resistance R1
Number end JACK_GND ends, second end of the inductance C2 connects the homophase input of first amplifier U1 by the resistance R2
End, the first end of the output termination resistance R9 of first amplifier U1, second end of the resistance R9 passes through the electric capacity
C5 connects the power amplifier, and the two ends of the resistance R5 connect the second end of the first end and resistance R9 of the inductance C1, the electricity respectively
Resistance R6 is connected between the inverting input and outfan of first amplifier U1；
The JACK_RIGHT ends at the first termination AUX audio signals end of the inductance C4, the second of the inductance C4
End connects the inverting input of second amplifier U2, the first termination AUX audio frequency of the inductance C3 by the resistance R4
The JACK_GND ends of signal end, second end of the inductance C3 connect the homophase input of second amplifier U2 by the resistance R3
End, the first end of the output termination resistance R10 of second amplifier U2, second end of the resistance R10 passes through the electricity
Hold C6 and connect the power amplifier, the two ends of the resistance R8 connect the second end of the first end and resistance R10 of the inductance C4 respectively, described
Resistance R7 is connected between the inverting input and outfan of second amplifier U2.
In this utility model embodiment, by increasing audio frequency ground isolating difference circuit on existing AUX voicefrequency circuits,
The isolation on audio frequency ground is added, and is converted to differential signal input, reached with this and stablized, the little audio input source of distortion is carried
The high audio quality of audio amplifier.
Description of the drawings
Fig. 1 is the structure chart of the audio frequency ground isolating difference circuit that this utility model embodiment is provided.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.
Fig. 1 shows the structure of the audio frequency ground isolating difference circuit that this utility model embodiment is provided, for convenience of description,
Illustrate only the part related to this utility model embodiment.
A kind of audio frequency ground isolating difference circuit, connects AUX audio signals end and power amplifier, the audio frequency ground isolating difference electricity respectively
Road includes：
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance
R10, inductance C1, inductance C2, inductance C3, inductance C4, inductance C5, inductance C6, the first amplifier U1 and the second amplifier U2；
The JACK_LEFT ends at the first termination AUX audio signals end of the inductance C1, second end of the inductance C1
The inverting input of first amplifier U1, the first termination AUX audio frequency letter of the inductance C2 are connect by the resistance R1
Number end JACK_GND ends, second end of the inductance C2 connects the homophase input of first amplifier U1 by the resistance R2
End, the first end of the output termination resistance R9 of first amplifier U1, second end of the resistance R9 passes through the electric capacity
C5 connects the power amplifier, and the two ends of the resistance R5 connect the second end of the first end and resistance R9 of the inductance C1, the electricity respectively
Resistance R6 is connected between the inverting input and outfan of first amplifier U1；
The JACK_RIGHT ends at the first termination AUX audio signals end of the inductance C4, the second of the inductance C4
End connects the inverting input of second amplifier U2, the first termination AUX audio frequency of the inductance C3 by the resistance R4
The JACK_GND ends of signal end, second end of the inductance C3 connect the homophase input of second amplifier U2 by the resistance R3
End, the first end of the output termination resistance R10 of second amplifier U2, second end of the resistance R10 passes through the electricity
Hold C6 and connect the power amplifier, the two ends of the resistance R8 connect the second end of the first end and resistance R10 of the inductance C4 respectively, described
Resistance R7 is connected between the inverting input and outfan of second amplifier U2.
Used as one embodiment of this utility model, audio frequency ground isolating difference circuit also includes：
Resistance R11, resistance R12, inductance C7, inductance C8；
The resistance R11 and inductance C7 be connected on the AUX audio signals end JACK_LEFT ends and JACK_GND ends it
Between, the resistance R12 and inductance C8 is connected in parallel between the JACK_LEFT ends and JACK_GND ends at the AUX audio signals end.
Used as one embodiment of this utility model, audio frequency ground isolating difference circuit also includes：
Resistance R13, resistance R14, inductance C9, inductance C10；
The resistance R13 and inductance C9 are connected on the JACK_RIGHT ends and JACK_GND ends at the AUX audio signals end
Between, the resistance R14 and inductance C10 be connected in parallel on the AUX audio signals end JACK_RIGHT ends and JACK_GND ends it
Between.
This utility model embodiment also provides a kind of audio amplifier, including AUX audio signals end and power amplifier, and the audio amplifier also includes
The audio frequency ground isolating difference circuit of the AUX audio signals end and power amplifier is connect respectively, and audio frequency ground isolating difference circuit includes：
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance
R10, inductance C1, inductance C2, inductance C3, inductance C4, inductance C5, inductance C6, the first amplifier U1 and the second amplifier U2；
The JACK_LEFT ends at the first termination AUX audio signals end of the inductance C1, second end of the inductance C1
The inverting input of first amplifier U1, the first termination AUX audio frequency letter of the inductance C2 are connect by the resistance R1
Number end JACK_GND ends, second end of the inductance C2 connects the homophase input of first amplifier U1 by the resistance R2
End, the first end of the output termination resistance R9 of first amplifier U1, second end of the resistance R9 passes through the electric capacity
C5 connects the power amplifier, and the two ends of the resistance R5 connect the second end of the first end and resistance R9 of the inductance C1, the electricity respectively
Resistance R6 is connected between the inverting input and outfan of first amplifier U1；
The JACK_RIGHT ends at the first termination AUX audio signals end of the inductance C4, the second of the inductance C4
End connects the inverting input of second amplifier U2, the first termination AUX audio frequency of the inductance C3 by the resistance R4
The JACK_GND ends of signal end, second end of the inductance C3 connect the homophase input of second amplifier U2 by the resistance R3
End, the first end of the output termination resistance R10 of second amplifier U2, second end of the resistance R10 passes through the electricity
Hold C6 and connect the power amplifier, the two ends of the resistance R8 connect the second end of the first end and resistance R10 of the inductance C4 respectively, described
Resistance R7 is connected between the inverting input and outfan of second amplifier U2.
Used as one embodiment of this utility model, audio frequency ground isolating difference circuit also includes：
Resistance R11, resistance R12, inductance C7, inductance C8；
The resistance R11 and inductance C7 be connected on the AUX audio signals end JACK_LEFT ends and JACK_GND ends it
Between, the resistance R12 and inductance C8 is connected in parallel between the JACK_LEFT ends and JACK_GND ends at the AUX audio signals end.
Used as one embodiment of this utility model, audio frequency ground isolating difference circuit also includes：
Resistance R13, resistance R14, inductance C9, inductance C10；
The resistance R13 and inductance C9 are connected on the JACK_RIGHT ends and JACK_GND ends at the AUX audio signals end
Between, the resistance R14 and inductance C10 be connected in parallel on the AUX audio signals end JACK_RIGHT ends and JACK_GND ends it
Between.
In this utility model embodiment, by increasing audio frequency ground isolating difference circuit on existing AUX voicefrequency circuits,
The isolation on audio frequency ground is added, and is converted to differential signal input, reached with this and stablized, the little audio input source of distortion is carried
The high audio quality of audio amplifier.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (6)
1. a kind of audio frequency ground isolating difference circuit, connects AUX audio signals end and power amplifier respectively, it is characterised in that the audio frequency ground
Isolating difference circuit includes：
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electricity
Sense C1, inductance C2, inductance C3, inductance C4, inductance C5, inductance C6, the first amplifier U1 and the second amplifier U2；
The JACK_LEFT ends at the first termination AUX audio signals end of the inductance C1, second end of the inductance C1 passes through
The resistance R1 connects the inverting input of first amplifier U1, the first termination AUX audio signals end of the inductance C2
JACK_GND ends, second end of the inductance C2 meets the in-phase input end of first amplifier U1, institute by the resistance R2
The first end of the output termination resistance R9 of the first amplifier U1 is stated, second end of the resistance R9 meets institute by the electric capacity C5
Power amplifier is stated, the two ends of the resistance R5 connect the second end of the first end and resistance R9 of the inductance C1 respectively, and the resistance R6 connects
It is connected between the inverting input and outfan of first amplifier U1；
The JACK_RIGHT ends at the first termination AUX audio signals end of the inductance C4, second end of the inductance C4 leads to
Cross the inverting input that the resistance R4 connects second amplifier U2, the first termination AUX audio signals of the inductance C3
The JACK_GND ends at end, second end of the inductance C3 connect the in-phase input end of second amplifier U2 by the resistance R3,
The first end of the output termination resistance R10 of second amplifier U2, second end of the resistance R10 passes through the electric capacity C6
The power amplifier is connect, the two ends of the resistance R8 connect the second end of the first end and resistance R10 of the inductance C4, the resistance respectively
R7 is connected between the inverting input and outfan of second amplifier U2.
2. audio frequency as claimed in claim 1 ground isolating difference circuit, it is characterised in that the audio frequency ground isolating difference circuit is also
Including：
Resistance R11, resistance R12, inductance C7, inductance C8；
The resistance R11 and inductance C7 are connected between the JACK_LEFT ends and JACK_GND ends at the AUX audio signals end,
The resistance R12 and inductance C8 are connected in parallel between the JACK_LEFT ends and JACK_GND ends at the AUX audio signals end.
3. audio frequency as claimed in claim 2 ground isolating difference circuit, it is characterised in that the audio frequency ground isolating difference circuit is also
Including：
Resistance R13, resistance R14, inductance C9, inductance C10；
The resistance R13 and inductance C9 are connected between the JACK_RIGHT ends and JACK_GND ends at the AUX audio signals end,
The resistance R14 and inductance C10 are connected in parallel between the JACK_RIGHT ends and JACK_GND ends at the AUX audio signals end.
4. a kind of audio amplifier, including AUX audio signal end and power amplifier, it is characterised in that the audio amplifier also includes meeting the AUX respectively
The audio frequency ground isolating difference circuit of audio signal end and power amplifier, audio frequency ground isolating difference circuit include：
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, electricity
Sense C1, inductance C2, inductance C3, inductance C4, inductance C5, inductance C6, the first amplifier U1 and the second amplifier U2；
The JACK_LEFT ends at the first termination AUX audio signals end of the inductance C1, second end of the inductance C1 passes through
The resistance R1 connects the inverting input of first amplifier U1, the first termination AUX audio signals end of the inductance C2
JACK_GND ends, second end of the inductance C2 meets the in-phase input end of first amplifier U1, institute by the resistance R2
The first end of the output termination resistance R9 of the first amplifier U1 is stated, second end of the resistance R9 meets institute by the electric capacity C5
Power amplifier is stated, the two ends of the resistance R5 connect the second end of the first end and resistance R9 of the inductance C1 respectively, and the resistance R6 connects
It is connected between the inverting input and outfan of first amplifier U1；
The JACK_RIGHT ends at the first termination AUX audio signals end of the inductance C4, second end of the inductance C4 leads to
Cross the inverting input that the resistance R4 connects second amplifier U2, the first termination AUX audio signals of the inductance C3
The JACK_GND ends at end, second end of the inductance C3 connect the in-phase input end of second amplifier U2 by the resistance R3,
The first end of the output termination resistance R10 of second amplifier U2, second end of the resistance R10 passes through the electric capacity C6
The power amplifier is connect, the two ends of the resistance R8 connect the second end of the first end and resistance R10 of the inductance C4, the resistance respectively
R7 is connected between the inverting input and outfan of second amplifier U2.
5. audio amplifier as claimed in claim 4, it is characterised in that audio frequency ground isolating difference circuit also includes：
Resistance R11, resistance R12, inductance C7, inductance C8；
The resistance R11 and inductance C7 are connected between the JACK_LEFT ends and JACK_GND ends at the AUX audio signals end,
The resistance R12 and inductance C8 are connected in parallel between the JACK_LEFT ends and JACK_GND ends at the AUX audio signals end.
6. audio amplifier as claimed in claim 5, it is characterised in that audio frequency ground isolating difference circuit also includes：
Resistance R13, resistance R14, inductance C9, inductance C10；
The resistance R13 and inductance C9 are connected between the JACK_RIGHT ends and JACK_GND ends at the AUX audio signals end,
The resistance R14 and inductance C10 are connected in parallel between the JACK_RIGHT ends and JACK_GND ends at the AUX audio signals end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076063.6U CN206117993U (en) | 2016-09-23 | 2016-09-23 | Audio frequency ground keeps apart differential circuit and audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076063.6U CN206117993U (en) | 2016-09-23 | 2016-09-23 | Audio frequency ground keeps apart differential circuit and audio amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN206117993U true CN206117993U (en) | 2017-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621076063.6U Active CN206117993U (en) | 2016-09-23 | 2016-09-23 | Audio frequency ground keeps apart differential circuit and audio amplifier |
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| CN (1) | CN206117993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182157A (en) * | 2019-12-30 | 2020-05-19 | 泰弗思科技(安徽)有限公司 | Isolated four-wire call one-to-two circuit |
-
2016
- 2016-09-23 CN CN201621076063.6U patent/CN206117993U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182157A (en) * | 2019-12-30 | 2020-05-19 | 泰弗思科技(安徽)有限公司 | Isolated four-wire call one-to-two circuit |
| CN111182157B (en) * | 2019-12-30 | 2021-02-09 | 泰弗思科技(安徽)有限公司 | Isolated four-wire call one-to-two circuit |
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