CN204425620U - A kind of audio signal processing circuit - Google Patents
A kind of audio signal processing circuit Download PDFInfo
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- CN204425620U CN204425620U CN201420856848.XU CN201420856848U CN204425620U CN 204425620 U CN204425620 U CN 204425620U CN 201420856848 U CN201420856848 U CN 201420856848U CN 204425620 U CN204425620 U CN 204425620U
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Abstract
A kind of audio signal processing circuit of the present utility model, comprise L channel input and R channel input, also comprise: L channel treble band bandpass filter, R channel treble band bandpass filter, bass strengthen system, signal amplitude restriction system, gain match circuit and bass band bandpass filter, the input of L channel treble band bandpass filter connects L channel input, export L channel high pitch output to, the input of R channel treble band bandpass filter is connected with R channel input, exports R channel high pitch output to; The input that bass strengthens system is connected with L channel input and R channel input; Bass strengthens system, signal amplitude restriction system, gain match circuit and bass band bandpass filter and connects successively, and the output of bass band bandpass filter is connected with bass output.Dual track normal audio signals is converted to the treble portion of left and right acoustic channels and the bass part of a sound channel by the utility model, and realizes the enhancing of audio signal bass part.
Description
Technical field
The utility model relates to a kind of audio signal processing circuit.
Background technology
Sound system refers to, with microphone, the acoustic signals of former sounding field sound is converted to the signal of telecommunication, and by certain requirement by the process of the signal of telecommunication by some electronic equipments, the signal of telecommunication is converted to acoustic signals and resets by final loud speaker again, and this whole formation from microphone to loud speaker is exactly sound system.Wherein microphone and loud speaker are all called transducer.Traditional Mini-type audio equipment system power amplifier, loudspeaker, lithium battery, bluetooth or MP3 is play the system forming complete set in casing that chipset is contained in a small size, but this type products major defect is due to the restriction etc. by volume, power, cost, adopt low power power amplifier and loudspeaker to make acoustics distortion, especially show that bass contribution is lost serious.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of can according to the audio signal processing circuit of loudspeaker, casing and power amplifier characteristic regulation output audio signal strength.
For reaching the object of above-mentioned utility model, the utility model is achieved through the following technical solutions:
A kind of audio signal processing circuit of the present utility model, comprise L channel input and R channel input, L channel treble band bandpass filter, R channel treble band bandpass filter, bass strengthen system, signal amplitude restriction system, gain match circuit and bass band bandpass filter, the input of L channel treble band bandpass filter connects L channel input, its output is connected with L channel high pitch output, the input of R channel treble band bandpass filter is connected with R channel input, and its output is connected with R channel high pitch output; Bass in order to amplify audio signal low frequency part strengthens system, and its input is connected with L channel input and R channel input; Bass strengthens system, in order to adjust the signal amplitude restriction system of audio signal strength within the scope of circuit requirement, in order to make the audio signal gain match circuit consistent with former audio signal waveform and bass band bandpass filter connect successively according to the setting of reference voltage, the output of bass band bandpass filter is connected with bass output.
Compared with prior art, the utility model tool has the following advantages:
Audio signal processing circuit of the present utility model, is converted to the treble portion of left and right acoustic channels and the bass part of a sound channel by dual track normal audio signals, and realizes the enhancing to audio signal bass part.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of a kind of audio signal processing circuit of the present utility model.
Embodiment
Be clearly and completely described the technical scheme in the utility model embodiment below in conjunction with drawings and Examples, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.
Refer to Fig. 1, for the circuit theory diagrams of audio signal processing circuit of the present utility model, the audio signal processing circuit of the present embodiment, comprise L channel input line_L and R channel input line_R, also include: L channel treble band bandpass filter 4, R channel treble band bandpass filter 5, bass strengthens system 1, signal amplitude restriction system 2, gain match circuit 3 and bass band bandpass filter 6, the input of L channel treble band bandpass filter 4 is connected with L channel input line_L, its output connects L channel high pitch output Out_L, the input of R channel treble band bandpass filter 5 is connected with R channel input line_R, its output is connected with R channel high pitch output Out_R, it is dual-port input that bass strengthens system 1, and input is connected with L channel input and R channel input, bass strengthens system 1, signal amplitude restriction system 2, gain match circuit 3 and bass band bandpass filter 4 and connects successively, and the output of bass band bandpass filter 4 is connected with bass output Out_Sub.
L channel treble band bandpass filter 4, receives the audio signal of L channel input line_L and exports treble audio signal;
R channel treble band bandpass filter 5, receives the audio signal of R channel input line_R and exports treble audio signal;
Bass strengthens system 1, receives the audio signal of L channel input line_L and R channel input line_R simultaneously and amplifies the signal strength signal intensity of audio signal low frequency part;
Signal amplitude restriction system 2, receives bass and strengthen the audio signal that low frequency part that system 1 exports amplifies, and the intensity adjusting this audio signal is within the scope of circuit requirement;
Gain match circuit 3, is connected with supply power voltage VCC and reference voltage VREF, and according to the setting of reference voltage VREF, the audio signal that signal amplitude restriction system 2 is processed is consistent with former audio signal waveform;
Bass band bandpass filter 6, the audio signal that receiving gain match circuit 3 passes through also exports bass audio signal.
Audio signal processing circuit of the present utility model, according to the characteristic of the body structure of sound equipment, loudspeaker and power amplifier, circuit parameter adjustment can be carried out, reach the reduction of energy consumption, the optimization of audio, concrete, first use DAAS electric sound testing system test loudspeaker and record horn characteristic curve; Then loudspeaker are loaded in the casing adopted, use acoustic characteristic curve under DAAS electric sound testing system testing passive state again, contrast horn characteristic curve and acoustic characteristic curve, behind the position of adjustment loudspeaker in casing, retest casing characteristic curve, makes horn characteristic curve consistent with casing characteristic curve; Finally power amplifier is accessed in the sound enclosure set, acoustic characteristic curve under use DAAS test system and test active, contrast acoustic characteristic curve under active and passive states, access audio signal processing circuit, and the electrical parameter of corresponding Circuit tuning, thus realize acoustic integrated regulation.
Above-described embodiment only in order to the utility model is described and and technical scheme described by unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment, those of ordinary skill in the art should be appreciated that and still can modify to the utility model or equivalent replacement; And all do not depart from technical scheme and the improvement thereof of spirit and scope of the present utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (1)
1. an audio signal processing circuit, comprise L channel input and R channel input, it is characterized in that: also include: L channel treble band bandpass filter, R channel treble band bandpass filter, bass strengthen system, signal amplitude restriction system, gain match circuit and bass band bandpass filter, the input of L channel treble band bandpass filter connects L channel input, its output is connected with L channel high pitch output, the input of R channel treble band bandpass filter is connected with R channel input, and its output is connected with R channel high pitch output; Bass in order to amplify audio signal low frequency part strengthens system, and its input is connected with L channel input and R channel input; Bass strengthens system, in order to adjust the signal amplitude restriction system of audio signal strength within the scope of circuit requirement, in order to make the audio signal gain match circuit consistent with former audio signal waveform and bass band bandpass filter connect successively according to the setting of reference voltage, the output of bass band bandpass filter is connected with bass output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420856848.XU CN204425620U (en) | 2014-12-30 | 2014-12-30 | A kind of audio signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420856848.XU CN204425620U (en) | 2014-12-30 | 2014-12-30 | A kind of audio signal processing circuit |
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| CN204425620U true CN204425620U (en) | 2015-06-24 |
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| CN201420856848.XU Active CN204425620U (en) | 2014-12-30 | 2014-12-30 | A kind of audio signal processing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108028050A (en) * | 2015-09-18 | 2018-05-11 | 高通股份有限公司 | Cooperate with audio frequency process |
| CN108668193A (en) * | 2017-03-30 | 2018-10-16 | 展讯通信（上海）有限公司 | A kind of bass enhancing method, device and playback equipment for playback equipment |
| CN113438572A (en) * | 2021-06-29 | 2021-09-24 | 歌尔科技有限公司 | Sound box and system |
-
2014
- 2014-12-30 CN CN201420856848.XU patent/CN204425620U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108028050A (en) * | 2015-09-18 | 2018-05-11 | 高通股份有限公司 | Cooperate with audio frequency process |
| CN108028050B (en) * | 2015-09-18 | 2021-10-22 | 高通股份有限公司 | Collaborative audio processing |
| CN108668193A (en) * | 2017-03-30 | 2018-10-16 | 展讯通信（上海）有限公司 | A kind of bass enhancing method, device and playback equipment for playback equipment |
| CN113438572A (en) * | 2021-06-29 | 2021-09-24 | 歌尔科技有限公司 | Sound box and system |
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