CN204498353U - A kind of active audio frequency harmonic absorbing circuit - Google Patents
A kind of active audio frequency harmonic absorbing circuit Download PDFInfo
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- CN204498353U CN204498353U CN201520228055.8U CN201520228055U CN204498353U CN 204498353 U CN204498353 U CN 204498353U CN 201520228055 U CN201520228055 U CN 201520228055U CN 204498353 U CN204498353 U CN 204498353U
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- accurate amplifier
- pass filter
- amplifier opa2227
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Abstract
The utility model provides a kind of active audio frequency harmonic absorbing circuit, can carry out active absorbing to the industrial frequency harmonic in audio frequency apparatus, and described circuit comprises power pack and harmonic wave absorption portion; Described power pack adopts power frequency supply to power, transformer pressure-reducing carries out full-bridge rectification after becoming low-voltage alternating-current, the direct current of pulsation is formed after rectification, the voltage stabilizing of 5v electricity is carried out again by sending into three-terminal voltage-stabilizing chip 7805 after solid-state tantalum capacitor filtering, signal after voltage stabilizing, again after tantalum capacitor filtering, provides the electric energy support of stable low ripple to harmonic absorption part; Described harmonic absorption part comprises low pass filter, high pass filter and adder, described low pass filter RC coupling forms 99Hz low-pass characteristic for 16k resistance and 0.1uF electric capacity, described high pass filter RC coupling forms 101Hz high pass characteristic for 15K resistance and 0.1uF electric capacity, described adder is that magnification ratio is 1 in the same way, and described low pass filter, described high pass filter and described adder combination are built as 100Hz trapper.
Description
Technical field
The utility model relates to audio area, particularly relates to a kind of active audio frequency harmonic absorbing circuit, mainly can carry out active filtering to being mingled with in audio signal industrial frequency harmonic, improves the degree of purity of signal.
Background technology
At present along with the development of Audiotechnica, the source of sound of high-quality, the application of high-resolution digital-to-analogue conversion all indicates that the pursuit of people to audio frequency is greatly improved, but often there is no small impact to audio quality from the harmonic signal of power frequency supply, in such a scenario, active audio frequency harmonic absorbing circuit has application drift prospect.
Summary of the invention
The object of this invention is to provide an active audio frequency harmonic absorption device.
Technical scheme of the present invention is: a kind of active audio frequency harmonic absorbing circuit, is characterized in that: described circuit comprises power pack and harmonic wave absorption portion.
Described power pack adopts power frequency supply to power, transformer pressure-reducing carries out full-bridge rectification after becoming low-voltage alternating-current, the direct current of pulsation is formed after rectification, the voltage stabilizing of 5v electricity is carried out again by sending into three-terminal voltage-stabilizing chip 7805 after solid-state tantalum capacitor filtering, signal after voltage stabilizing, again after tantalum capacitor filtering, provides the electric energy support of stable low ripple to harmonic absorption part.
Described harmonic absorption part comprises low pass filter, high pass filter and adder, described low pass filter RC coupling forms 99Hz low-pass characteristic for 16k resistance and 0.1uF electric capacity, described high pass filter RC coupling forms 101Hz high pass characteristic for 15K resistance and 0.1uF electric capacity, described adder is that magnification ratio is 1 in the same way, and described low pass filter, described high pass filter and described adder combination are built as 100Hz trapper.
Power supply adopts power frequency supply to power, transformer pressure-reducing carries out full-bridge rectification after becoming low-voltage alternating-current, the direct current of pulsation is formed after rectification, the voltage stabilizing of 5v electricity is carried out again by sending into three-terminal voltage-stabilizing chip 7805 after solid-state tantalum capacitor filtering, signal after voltage stabilizing, again after tantalum capacitor filtering, provides the electric energy support of stable low ripple to harmonic absorption part, harmonic absorption part is by low pass filter, high pass filter, add circuit composition in the same way, low pass filter RC coupling forms 99Hz low-pass characteristic for 16k resistance and 0.1uF electric capacity, high pass filter RC coupling forms 101Hz high pass characteristic for 15K resistance and 0.1uF electric capacity, adder for magnification ratio be in the same way 1, low pass filter and high pass filter and adder combination are built as 100Hz trapper, modularized design, can structure 150Hz by replacement to RC in low pass and high pass filter, the filtering of the selective harmonic such as 200HZ, its circuit connects: 220V alternating current is by rectifier bridge D1 to D4 and 220uF filtering tantalum electric capacity C1, connect 1 pin and 2 pin of three-terminal voltage-stabilizing chip 7805,3 pin of end voltage stabilizing chip 7805 connect 2 pin of 220uF filtering tantalum electric capacity C2 to three-terminal voltage-stabilizing chip 7805,1 pin of 2PIN power interface P1 connects 3 pin of three-terminal voltage-stabilizing chip 7805, and 2 pin of 2PIN power interface P1 connect 2 pin of three-terminal voltage-stabilizing chip 7805, the 2 pin serial connection 16K resistance R3 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 0.1uF electric capacity C3 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 10K resistance R2 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, accurate amplifier OPA2227(U2) 1 pin 2 pin indirect 15K resistance R1, the 2 pin serial connection 0.1uF electric capacity C4 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 15K resistance R6 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, 1 pin of coaxial interface S1 meets accurate amplifier OPA2227(U2, U3) 4 pin, the 1 pin serial connection 10K resistance R5 to accurate amplifier OPA2227(U3 of coaxial interface S1) 3 pin, accurate amplifier OPA2227(U3) 1 pin 2 pin indirect 15K resistance R4, accurate amplifier OPA2227(U2) 1 pin meet 10K resistance R9 to accurate amplifier OPA2227(U4) 3 pin, accurate amplifier OPA2227(U3) 1 pin meet 10K resistance R10 to accurate amplifier OPA2227(U4) 3 pin, the 1 pin serial connection 10K resistance R8 to accurate amplifier OPA2227(U4 of coaxial interface S1) 2 pin, accurate amplifier OPA2227(U3) 1 pin 2 pin indirect 10K resistance R7, 1 pin of coaxial interface S2 meets accurate amplifier OPA2227(U3) 1 pin, 2 pin of coaxial interface S2 connect 2 pin of coaxial interface S1, 1 pin of power interface P2 meets accurate amplifier OPA2227(U2, U3, U4) 8 pin, 2 pin of power interface P2 meet accurate amplifier OPA2227(U2, U3, U4) 4 pin.
The beneficial effects of the utility model: adopt linear power supply chip and adopt tantalum capacitor filtering, power supply ripple is little, harmonic absorption portions modular, can absorb multiple frequency.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is active audio frequency harmonic absorbing circuit power pack circuit diagram;
Fig. 2 is active audio frequency harmonic absorbing circuit harmonic absorption partial circuit figure.
Description of reference numerals: U1: three-terminal voltage-stabilizing chip 7805; U2, U3, U4: accurate amplifier OPA2227.
Embodiment
Below in conjunction with drawings and Examples, to above-mentioned being described in more detail with other technical characteristic and advantage of the utility model.
As shown in Figure 1, the utility model circuit supply adopts power frequency supply to power, transformer pressure-reducing carries out full-bridge rectification after becoming low-voltage alternating-current, the direct current of pulsation is formed after rectification, the voltage stabilizing of 5v electricity is carried out again by sending into three-terminal voltage-stabilizing chip 7805 after solid-state tantalum capacitor filtering, signal after voltage stabilizing, again after tantalum capacitor filtering, provides the electric energy support of stable low ripple to harmonic absorption part, harmonic absorption part is by low pass filter, high pass filter, add circuit composition in the same way, low pass filter RC coupling forms 99Hz low-pass characteristic for 16k resistance and 0.1uF electric capacity, high pass filter RC coupling forms 101Hz high pass characteristic for 15K resistance and 0.1uF electric capacity, adder for magnification ratio be in the same way 1, low pass filter and high pass filter and adder combination are built as 100Hz trapper, modularized design, can structure 150Hz by replacement to RC in low pass and high pass filter, the filtering of the selective harmonic such as 200HZ, its circuit connects: 220V alternating current is by rectifier bridge D1 to D4 and 220uF filtering tantalum electric capacity C1, connect 1 pin and 2 pin of three-terminal voltage-stabilizing chip 7805,3 pin of end voltage stabilizing chip 7805 connect 2 pin of 220uF filtering tantalum electric capacity C2 to three-terminal voltage-stabilizing chip 7805,1 pin of 2PIN power interface P1 connects 3 pin of three-terminal voltage-stabilizing chip 7805, and 2 pin of 2PIN power interface P1 connect 2 pin of three-terminal voltage-stabilizing chip 7805, the 2 pin serial connection 16K resistance R3 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 0.1uF electric capacity C3 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 10K resistance R2 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, accurate amplifier OPA2227(U2) 1 pin 2 pin indirect 15K resistance R1, the 2 pin serial connection 0.1uF electric capacity C4 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 15K resistance R6 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, 1 pin of coaxial interface S1 meets accurate amplifier OPA2227(U2, U3) 4 pin, the 1 pin serial connection 10K resistance R5 to accurate amplifier OPA2227(U3 of coaxial interface S1) 3 pin, accurate amplifier OPA2227(U3) 1 pin 2 pin indirect 15K resistance R4, accurate amplifier OPA2227(U2) 1 pin meet 10K resistance R9 to accurate amplifier OPA2227(U4) 3 pin, accurate amplifier OPA2227(U3) 1 pin meet 10K resistance R10 to accurate amplifier OPA2227(U4) 3 pin, the 1 pin serial connection 10K resistance R8 to accurate amplifier OPA2227(U4 of coaxial interface S1) 2 pin, accurate amplifier OPA2227(U3) 1 pin 2 pin indirect 10K resistance R7, 1 pin of coaxial interface S2 meets accurate amplifier OPA2227(U3) 1 pin, 2 pin of coaxial interface S2 connect 2 pin of coaxial interface S1, 1 pin of power interface P2 meets accurate amplifier OPA2227(U2, U3, U4) 8 pin, 2 pin of power interface P2 meet accurate amplifier OPA2227(U2, U3, U4) 4 pin.
Embodiment 1: appointment harmonic wave is absorbed, audio signal is inputted by audio input port, signal enters adder in the same way simultaneously and carries out (i.e. composition harmonic absorption a module of suing for peace after low pass and high pass filter, this module parameter only depends on R3 C3, R6, C4), the signal of this harmonic wave that can be absorbed.
Embodiment 2: absorb multiple harmonic wave, through the harmonic absorption module described in multiple embodiment 1 after audio signal enters, absorbs the harmonic wave of multiple frequencies.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that the utility model claims determine.
Claims (2)
1. an active audio frequency harmonic absorbing circuit, is characterized in that: described circuit comprises power pack and harmonic wave absorption portion;
Described power pack adopts power frequency supply to power, transformer pressure-reducing carries out full-bridge rectification after becoming low-voltage alternating-current, the direct current of pulsation is formed after rectification, the voltage stabilizing of 5v electricity is carried out again by sending into three-terminal voltage-stabilizing chip 7805 after solid-state tantalum capacitor filtering, signal after voltage stabilizing, again after tantalum capacitor filtering, provides the electric energy support of stable low ripple to harmonic absorption part;
Described harmonic absorption part comprises low pass filter, high pass filter and adder, described low pass filter RC coupling forms 99Hz low-pass characteristic for 16k resistance and 0.1uF electric capacity, described high pass filter RC coupling forms 101Hz high pass characteristic for 15K resistance and 0.1uF electric capacity, described adder is that magnification ratio is 1 in the same way, and described low pass filter, described high pass filter and described adder combination are built as 100Hz trapper.
2. a kind of active audio frequency harmonic absorbing circuit according to claim 1, it is characterized in that: described circuit connection is: 220V alternating current is by rectifier bridge D1 to D4 and 220uF filtering tantalum electric capacity C1, connect 1 pin and 2 pin of three-terminal voltage-stabilizing chip 7805,3 pin of end voltage stabilizing chip 7805 connect 2 pin of 220uF filtering tantalum electric capacity C2 to three-terminal voltage-stabilizing chip 7805,1 pin of 2PIN power interface P1 connects 3 pin of three-terminal voltage-stabilizing chip 7805, and 2 pin of 2PIN power interface P1 connect 2 pin of three-terminal voltage-stabilizing chip 7805, the 2 pin serial connection 16K resistance R3 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 0.1uF electric capacity C3 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 10K resistance R2 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, accurate amplifier OPA2227(U2) 1 pin 2 pin indirect 15K resistance R1, the 2 pin serial connection 0.1uF electric capacity C4 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, the 1 pin serial connection 15K resistance R6 to accurate amplifier OPA2227(U2 of coaxial interface S1) 3 pin, 1 pin of coaxial interface S1 meets accurate amplifier OPA2227(U2, U3) 4 pin, the 1 pin serial connection 10K resistance R5 to accurate amplifier OPA2227(U3 of coaxial interface S1) 3 pin, accurate amplifier OPA2227(U3) 1 pin 2 pin indirect 15K resistance R4, accurate amplifier OPA2227(U2) 1 pin meet 10K resistance R9 to accurate amplifier OPA2227(U4) 3 pin, accurate amplifier OPA2227(U3) 1 pin meet 10K resistance R10 to accurate amplifier OPA2227(U4) 3 pin, the 1 pin serial connection 10K resistance R8 to accurate amplifier OPA2227(U4 of coaxial interface S1) 2 pin, accurate amplifier OPA2227(U3) 1 pin 2 pin indirect 10K resistance R7, 1 pin of coaxial interface S2 meets accurate amplifier OPA2227(U3) 1 pin, 2 pin of coaxial interface S2 connect 2 pin of coaxial interface S1, 1 pin of power interface P2 meets accurate amplifier OPA2227(U2, U3, U4) 8 pin, 2 pin of power interface P2 meet accurate amplifier OPA2227(U2, U3, U4) 4 pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520228055.8U CN204498353U (en) | 2015-04-16 | 2015-04-16 | A kind of active audio frequency harmonic absorbing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520228055.8U CN204498353U (en) | 2015-04-16 | 2015-04-16 | A kind of active audio frequency harmonic absorbing circuit |
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| Publication Number | Publication Date |
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| CN204498353U true CN204498353U (en) | 2015-07-22 |
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| CN201520228055.8U Expired - Fee Related CN204498353U (en) | 2015-04-16 | 2015-04-16 | A kind of active audio frequency harmonic absorbing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107896358A (en) * | 2017-11-24 | 2018-04-10 | 江门市兰格电子有限公司 | A kind of voice modifies device |
-
2015
- 2015-04-16 CN CN201520228055.8U patent/CN204498353U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107896358A (en) * | 2017-11-24 | 2018-04-10 | 江门市兰格电子有限公司 | A kind of voice modifies device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20160416 |
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| CF01 | Termination of patent right due to non-payment of annual fee |