CN205754228U - Audio power amplifying circuit - Google Patents
Audio power amplifying circuit Download PDFInfo
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- CN205754228U CN205754228U CN201520997671.XU CN201520997671U CN205754228U CN 205754228 U CN205754228 U CN 205754228U CN 201520997671 U CN201520997671 U CN 201520997671U CN 205754228 U CN205754228 U CN 205754228U
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- frequency compensation
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- power amplifying
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Abstract
This utility model relates to a kind of audio power amplifying circuit, including: balancing circuitry, filter circuit, follower, high-frequency compensation apparatus, low-frequency compensation device and negative circuit；Balancing circuitry connects follower by filter circuit；Follower connects high-frequency compensation apparatus, low-frequency compensation device respectively；High-frequency compensation apparatus, the outfan of low-frequency compensation device connect negative circuit；Described balancing circuitry incoming audio signal, for suppressing the common-mode noise of audio signal；Described filter circuit carries out frequency filtering to audio signal；Audio signal is isolated by described follower, and audio signal is divided into two-way input described high-frequency compensation apparatus, low-frequency compensation device；Described high-frequency compensation apparatus, low-frequency compensation device carry out frequency compensation to audio signal respectively；The phase place of audio signal is adjusted and exports by described negative circuit.Technology of the present utility model, simple to the regulation process operation of the audio signal of input, circuit structure is easily achieved, low cost.
Description
Technical field
This utility model relates to Audiotechnica field, particularly relates to the audio power amplifying circuit of a kind of active audio amplifier.
Background technology
Professional audio merit amplifier, at the junior college's power audio amplifier specifying terms and conditions to drive.It is widely used in the particular places such as commercial performance, stadiums, meeting room, KTV amusement, properties of product are had higher requirements.
Traditional audio power amplifying circuit, simply a simple audio signal power amplification, cannot adjust effect to particular place.When needs carry out adjusting effect, mainly by computer or dsp chip control mode, by controlling curve, EQ control etc., although realize function more, but regulation process is complicated, and device cost is higher.
Utility model content
Based on this, it is necessary to for the problem that existing regulation process is complicated, it is provided that a kind of audio power amplifying circuit.
A kind of audio power amplifying circuit, including: balancing circuitry, filter circuit, follower, high-frequency compensation apparatus, low-frequency compensation device and negative circuit；
Described balancing circuitry connects follower by described filter circuit；
Described follower connects high-frequency compensation apparatus, low-frequency compensation device respectively；
Described high-frequency compensation apparatus, the outfan of low-frequency compensation device connect negative circuit；
Described balancing circuitry incoming audio signal, for suppressing the common-mode noise of audio signal；Described filter circuit carries out frequency filtering to audio signal；Audio signal is isolated by described follower, and audio signal is divided into two-way input described high-frequency compensation apparatus, low-frequency compensation device；Described high-frequency compensation apparatus, low-frequency compensation device carry out frequency compensation to audio signal respectively；The phase place of audio signal is adjusted and exports by described negative circuit.
In one embodiment, described high-frequency compensation apparatus includes the first switch and high frequency compensation；
Described balancing circuitry connects high frequency compensation by described first switch.
In one embodiment, described low-frequency compensation device includes second switch and low-frequency compensation circuit；
Described balancing circuitry connects low-frequency compensation circuit by described second switch.
In one embodiment, described balancing circuitry suppression common-mode noise is more than or equal to 60dB.
In one embodiment, the frequency range of described filter circuit is 20Hz-20KHz.
In one embodiment, the frequency range of described filter circuit is 100Hz-20KHz.
In one embodiment, the 5KHz frequency range of audio signal is promoted 3dB by high frequency compensation.
In one embodiment, the phase place of described negative circuit adjustment audio signal is 0 degree and 180 degree.
Above-mentioned audio power amplifying circuit, connects composition by balancing circuitry, filter circuit, follower, high-frequency compensation apparatus, low-frequency compensation device and negative circuit, and simple to the regulation process operation of the audio signal of input, circuit structure is easily achieved, low cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the audio power amplifying circuit of an embodiment；
Fig. 2 is the structural representation of the high and low frequency compensation device part of an embodiment.
Detailed description of the invention
Structural representation with reference to the audio power amplifying circuit that Fig. 1, Fig. 1 are an embodiment.
A kind of audio power amplifying circuit, including: balancing circuitry 101, filter circuit 102, follower 103, high-frequency compensation apparatus 104, low-frequency compensation device 105 and negative circuit 106.
Described balancing circuitry 101 connects follower 103 by described filter circuit 102；Described follower 103 connects high-frequency compensation apparatus 104, low-frequency compensation device 105 respectively；Described high-frequency compensation apparatus 104, the outfan of low-frequency compensation device 105 connect negative circuit 106.
Described balancing circuitry 101 incoming audio signal, for suppressing the common-mode noise of audio signal；In one embodiment, balancing circuitry 101 suppresses common-mode noise to be more than or equal to 60dB；The interference noise of long range signals source transmission can be effectively reduced.
Described filter circuit 102 carries out frequency filtering to audio signal；In one embodiment, the frequency range of described filter circuit 102 is 20Hz-20KHz, i.e. leads directly to audio signal, may be used for listening the music of genuineness.Alternatively, it is also possible to audio signal is carried out high-pass filtering；The frequency range of filtering is 100Hz-20KHz, may be used for meeting room such as and applies, low frequency is filtered and makes speech utterance become apparent from.
Audio signal is isolated by described follower 103, and audio signal is divided into two-way input described high-frequency compensation apparatus 104, low-frequency compensation device 105；Described high-frequency compensation apparatus 104, low-frequency compensation device 105 carry out frequency compensation to audio signal respectively.
In one embodiment, with reference to shown in Fig. 2, described high-frequency compensation apparatus 104 includes the first switch 1041 and high frequency compensation 1042；Described follower 103 is by described first switch 1041 connection high frequency compensation 1042.Described low-frequency compensation device 105 includes second switch 1051 and low-frequency compensation circuit 1052；Described follower 103 connects low-frequency compensation circuit 1052 by described second switch 1051.
In one embodiment, the 5KHz frequency range of audio signal is promoted 3dB by high frequency compensation 1042；Concrete, described low-frequency compensation circuit 1052 can be by selecting to switch the value of feedback of the resistance changing low-frequency compensation circuit 1052 so that 100Hz frequency range lifting 3dB, and the bass making the audio signal of output is the most dynamic；High frequency compensation 1042 can also change the value of feedback of resistance by selecting switch thus 5KHz frequency range promotes 3dB, and the high pitch making the audio signal of output is louder.
The phase place of audio signal is adjusted and exports by described negative circuit 106；The phase place of described negative circuit 106 adjustment audio signal is 0 degree and 180 degree.
Above-mentioned audio power amplifying circuit, composition is connected by balancing circuitry 101, follower 103, high-frequency compensation apparatus 104, low-frequency compensation device 105 and negative circuit 106, simple to the regulation process operation of the audio signal of input, circuit structure is easily achieved, low cost.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (8)
1. an audio power amplifying circuit, it is characterised in that including: balancing circuitry, filter circuit, follower, high-frequency compensation apparatus, low-frequency compensation device and negative circuit；
Described balancing circuitry connects follower by described filter circuit；
Described follower connects high-frequency compensation apparatus, low-frequency compensation device respectively；
Described high-frequency compensation apparatus, the outfan of low-frequency compensation device connect negative circuit；
Described balancing circuitry incoming audio signal, for suppressing the common-mode noise of audio signal；Described filter circuit carries out frequency filtering to audio signal；Audio signal is isolated by described follower, and audio signal is divided into two-way input described high-frequency compensation apparatus, low-frequency compensation device；Described high-frequency compensation apparatus, low-frequency compensation device carry out frequency compensation to audio signal respectively；The phase place of audio signal is adjusted and exports by described negative circuit.
Audio power amplifying circuit the most according to claim 1, it is characterised in that described high-frequency compensation apparatus includes the first switch and high frequency compensation；
Described balancing circuitry connects high frequency compensation by described first switch.
Audio power amplifying circuit the most according to claim 1, it is characterised in that described low-frequency compensation device includes second switch and low-frequency compensation circuit；
Described balancing circuitry connects low-frequency compensation circuit by described second switch.
Audio power amplifying circuit the most according to claim 1, it is characterised in that described balancing circuitry suppression common-mode noise is more than or equal to 60dB.
Audio power amplifying circuit the most according to claim 1, it is characterised in that the frequency range of described filter circuit is 20Hz-20KHz.
Audio power amplifying circuit the most according to claim 1, it is characterised in that the frequency range of described filter circuit is 100Hz-20KHz.
Audio power amplifying circuit the most according to claim 2, it is characterised in that the 5KHz frequency range of audio signal is promoted 3dB by high frequency compensation.
Audio power amplifying circuit the most according to claim 1, it is characterised in that the phase place of described negative circuit adjustment audio signal is 0 degree and 180 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520997671.XU CN205754228U (en) | 2015-12-02 | 2015-12-02 | Audio power amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520997671.XU CN205754228U (en) | 2015-12-02 | 2015-12-02 | Audio power amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205754228U true CN205754228U (en) | 2016-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520997671.XU Active CN205754228U (en) | 2015-12-02 | 2015-12-02 | Audio power amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205754228U (en) |
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2015
- 2015-12-02 CN CN201520997671.XU patent/CN205754228U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Science City (Guangzhou) Finance Leasing Co., Ltd Assignor: GUANGZHOU RUIFENG AUDIO TECHNOLOGY CORPORATION Ltd. Contract record no.: X2020980000388 Denomination of utility model: Balanced transformer less (BTL) differential type audio power amplification circuit Granted publication date: 20161130 License type: Exclusive License Record date: 20200228 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Balanced transformer less (BTL) differential type audio power amplification circuit Effective date of registration: 20200302 Granted publication date: 20161130 Pledgee: Science City (Guangzhou) Finance Leasing Co., Ltd Pledgor: GUANGZHOU RUIFENG AUDIO TECHNOLOGY CORPORATION Ltd. Registration number: Y2020980000413 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Science City (Guangzhou) Finance Leasing Co.,Ltd. Assignor: GUANGZHOU RUIFENG AUDIO TECHNOLOGY Corp.,Ltd. Contract record no.: X2020980000388 Date of cancellation: 20220217 |
|
| EC01 | Cancellation of recordation of patent licensing contract | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220217 Granted publication date: 20161130 Pledgee: Science City (Guangzhou) Finance Leasing Co.,Ltd. Pledgor: GUANGZHOU RUIFENG AUDIO TECHNOLOGY Corp.,Ltd. Registration number: Y2020980000413 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |