CN207752786U - A kind of audio frequency processing circuit and system - Google Patents
A kind of audio frequency processing circuit and system Download PDFInfo
- Publication number
- CN207752786U CN207752786U CN201820154782.8U CN201820154782U CN207752786U CN 207752786 U CN207752786 U CN 207752786U CN 201820154782 U CN201820154782 U CN 201820154782U CN 207752786 U CN207752786 U CN 207752786U
- Authority
- CN
- China
- Prior art keywords
- audio
- capacitance
- frequency processing
- audio frequency
- processing circuit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The utility model is suitable for audio signal processing technique field, provides a kind of audio frequency processing circuit and system, above-mentioned audio frequency processing circuit include：First filter circuit and the second filter circuit in parallel；First filter circuit includes first resistor and the first capacitance, and first resistor and the first capacitance are connected；Second filter circuit includes second resistance and the second capacitance, and second resistance and the second capacitance are connected；Above-mentioned audio frequency processing circuit further includes：Respectively with the first filter circuit and the concatenated 3rd resistor of the second filter circuit；And the third capacitance in parallel with 3rd resistor.The cost that interactive voice equipment sound intermediate frequency processing system can be reduced by the utility model, improves the practicability of equipment.
Description
Technical field
The utility model belongs to audio signal processing technique field more particularly to a kind of audio frequency processing circuit and system.
Background technology
Currently, the products such as robot, speaker usually have intelligent sound interactive function.In user and equipment interactive voice
Multimedia audio signal and user voice signal can be existed simultaneously in the process, it is therefore desirable to additionally use audio processing chip by sound
Frequency signal is handled, and anti-stop signal interferes with each other.
But audio processing chip is of high cost, and design is complicated, and the inexpensive product in part is without audio frequency process, but greatly
Ground reduces user experience.
Utility model content
In view of this, the utility model embodiment provides a kind of audio frequency processing circuit and system, to solve the prior art
The problem of audio frequency processing system high expensive in middle smart machine.
The first aspect of the utility model embodiment provides a kind of audio frequency processing circuit, including：First filtering in parallel
Circuit and the second filter circuit；
Above-mentioned first filter circuit includes first resistor and the first capacitance, and first resistor and the first capacitance are connected；Second filter
Wave circuit includes second resistance and the second capacitance, and second resistance and the second capacitance are connected；
Above-mentioned audio frequency processing circuit further includes：
Respectively with the first filter circuit and the concatenated 3rd resistor of the second filter circuit；
And the third capacitance in parallel with 3rd resistor.
Preferably, one end of above-mentioned third capacitance and one end of 3rd resistor are connected to ground altogether；
The other end of third capacitance and the other end of 3rd resistor are connected to divider altogether.
Preferably, above-mentioned divider is the 4th capacitance.
Preferably, above-mentioned first capacitance, the second capacitance and the 4th capacitance are blocking coupled capacitor.
The second aspect of the utility model embodiment provides a kind of audio frequency processing system, including：Audio Controller and
Above-mentioned any audio frequency processing circuit；Audio Controller includes audio input end, the first audio output, the second audio output
End；
Above-mentioned first audio output is connect by audio frequency processing circuit with audio input end.
Existing advantageous effect is the utility model embodiment compared with prior art：Pass through concatenated first resistor and
After one capacitance is in parallel with concatenated second resistance and the second capacitance, with 3rd resistor, the concatenated audio frequency processing circuit of third capacitance
Audio signal is controlled in the amplitude of audio output, while direct current signal and high-frequency interferencing signal is filtered out, the audio of output is made to believe
Number meet design requirement, in order to which other terminals filter out the influence for the audio signal that this audio signal inputs other ports.
The audio frequency processing circuit provided in the present embodiment is simple in structure, can be carried out at isolation to audio signal instead of audio processing chip
Reason, under the premise of ensureing user experience, reduces the cost of interactive voice equipment sound intermediate frequency processing system, improves equipment
Practicability.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram for the audio frequency processing circuit that the utility model first embodiment provides；
Fig. 2 is the structural schematic diagram for another audio frequency processing circuit that the utility model first embodiment provides；
Fig. 3 is the structural schematic diagram for the audio frequency processing system that the utility model second embodiment provides.
Specific implementation mode
In being described below, for illustration and not for limitation, it is proposed that such as tool of particular system structure, technology etc
Body details, to understand thoroughly the utility model embodiment.However, it will be clear to one skilled in the art that there is no these
The utility model can also be realized in the other embodiments of detail.In other situations, omit to well-known system,
The detailed description of apparatus, circuit and method, in case unnecessary details interferes the description of the utility model.
In order to illustrate technical solution described in the utility model, illustrated below by specific embodiment.
Embodiment one
Fig. 1 shows the structural schematic diagram for the audio frequency processing circuit that the utility model first embodiment provides, for the ease of
Illustrate, only the parts related to this embodiment are shown, as shown in Figure 1：
A kind of audio frequency processing circuit, the audio frequency processing circuit include：
First filter circuit 1 and the second filter circuit 2 in parallel；
First filter circuit 1 includes first resistor R1 and the first capacitance C1, the first resistor R1 and the first capacitance
C1 connects；Second filter circuit 2 includes second resistance R2 and the second capacitance C2, the second resistance R2 and the second capacitance C2
Series connection；
The audio frequency processing circuit further includes：
Respectively with 2 concatenated 3rd resistor R3 of first filter circuit 1 and second filter circuit；
And the third capacitance C3 in parallel with the 3rd resistor R3.
Preferably, as shown in Fig. 2, one end of the third capacitance C3 and one end of the 3rd resistor R3 are connected to ground altogether；
The other end of the third capacitance C3 is connected to divider 3 altogether with the other end of the 3rd resistor R3.
In above-mentioned audio frequency processing circuit, it is preferred that the divider 3 is the 4th capacitance C4.First capacitance
C1, the second capacitance C2 and divider 3 are blocking coupled capacitor, for filtering out direct current signal during the output of audio signal,
It avoids direct current by coil, causes coil seriously to generate heat until burning.
Specifically, the first capacitance C1 connects with first resistor R1, is considered as the first filter circuit 1, receives audio signal；Second
Capacitance C2 connects with second resistance R2, is considered as the second filter circuit 2, receives audio signal.
It should be noted that the first filter circuit 1 and 2 the received audio signal of the second filter circuit are the same signal
The different audio signals in source.For example, 1 the received audio signal of the first filter circuit is the audio signal of L channel, the second filter
2 the received audio signal of wave circuit is the audio signal of right channel；Or 1 the received audio signal of the first filter circuit is
The media voice signal that equipment itself is sent out, 2 the received audio signal of the second filter circuit are the user speech that user sends out
Signal.The direct current signal in above-mentioned audio signal can be filtered out by the first filter circuit 1 and the second filter circuit 2.
In above-mentioned audio frequency processing circuit, first resistor R1 and third capacitance C3 can also constitute low-pass filter, together
Reason, second resistance R2 and third capacitance C3 constitute low-pass filter, dry for filtering out high frequency in the transmission process of audio signal
Signal is disturbed, high-frequency noise is reduced.
Specifically, first resistor R1 and third capacitance C3 can be considered as series relationship, and one end of third capacitance C3 is grounded, the
The other end of three capacitance C3 is connect with divider 3；Similarly, second resistance R2 and third capacitance C3 can also be considered as series relationship,
One end of third capacitance C3 is grounded, and the other end of third capacitance C3 is connect with divider 3.
It should be noted that passing through first resistor R1 and third capacitance C3 and second resistance R2 and third capacitance C3 structures
At low-pass filter, the high-frequency interferencing signal in the above-mentioned left and right acoustic channels audio signal received is connect by third capacitance C3
The one end on ground filters out, and the other signals in audio signal are output to divider 3 by the other end of third capacitance C3, reach audio
The effect of filtering and the integration of signal.
Meanwhile in above-mentioned audio frequency processing circuit, after first resistor R1 parallel connection second resistances R2 with 3rd resistor R3 structures
At bleeder circuit, can be used for controlling output amplitude.
In the present embodiment, a kind of audio frequency processing circuit is provided, the input terminal of circuit receives audio signal, passes through first
Believe with 3rd resistor, the concatenated circuit control audio of third capacitance after resistance, the first capacitance are in parallel with second resistance, the second capacitance
Number circuit output end amplitude, while filtering out direct current signal and high-frequency interferencing signal, the audio signal of output made to meet design
It is required that filtering out the influence for the audio signal that this audio signal inputs other ports convenient for other terminals.It is carried in the present embodiment
The audio frequency processing circuit of confession is simple in structure, can be handled audio signal instead of audio processing chip, is ensureing user's body
Under the premise of testing, the cost of interactive voice equipment sound intermediate frequency processing system is reduced, the practicability of equipment is improved.
Embodiment two
Fig. 3 shows that a kind of audio frequency processing system that the utility model second embodiment provides only shows for convenience of description
Part related to the present embodiment is gone out, as shown in Figure 3：
A kind of audio frequency processing circuit in audio frequency processing system, including Audio Controller 4 and above-described embodiment one；It is described
Audio Controller 4 includes audio input end 41, the first audio output 411, the second audio output 412；First audio
Output end 411 is connect by the audio frequency processing circuit with the audio input end 41.
The audio input end 41 is specifically used for after receiving external sound signal and audio frequency processing circuit processing for equipment
Audio signal；
First audio output 411 is specifically used for the audio signal received in output audio input end 41；
Another audio letter received in second audio output, the 412 particular user output audio input end 41
Number.
The course of work of above-mentioned audio frequency processing system is：
Audio input end 41 is for receiving audio signal, and when using interactive voice equipment, two kinds are usually contained in equipment
Audio signal, one is the media voice signals that equipment itself is sent out, and one is the user voice signals that user sends out, it is assumed that two
Kind audio signal is inputted by audio input end 41, is then passed through the first audio output 411 and is exported.First in the present embodiment
Audio output 411 exports above-mentioned media voice signal and user voice signal, then the first filtered electrical in audio frequency processing circuit
Road 1 and the second filter circuit 2, which can correspond to, obtains above-mentioned media voice signal and user voice signal；It is filtered by audio frequency processing circuit
After wave, amplitude modulation, media voice signal and user voice signal integration are converted into an audio signal and export that feed back to audio defeated
Enter end 41；The above-mentioned transformed audio signal of integration is again inputted by audio input end 41 in Audio Controller 4, in audio
Media voice signal is isolated with user voice signal in controller 4 so that the second audio output 412 only exports user speech
Signal, thus interactive voice equipment will not be interfered by media voice signal when receiving user voice signal, i.e., by media
Voice signal is filtered out from user voice signal.
In the present embodiment, the audio frequency processing circuit in a kind of audio frequency processing system, including embodiment one is provided, is passed through
Above-mentioned audio frequency processing circuit control media voice signal while filtering out direct current signal and High-frequency Interference in the amplitude of circuit output end
Signal makes the media voice signal of output meet design requirement so that media voice signal is isolated with the voice signal of user, is subtracted
Lack interference of the media voice signal exported in equipment to user speech input signal, improves user experience.
Embodiment described above is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to before
Embodiment is stated the utility model is described in detail, it will be understood by those of ordinary skill in the art that：It still can be with
Technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；And
These modifications or replacements, the spirit for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
And range, it should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of audio frequency processing circuit, which is characterized in that the audio frequency processing circuit includes：
First filter circuit and the second filter circuit in parallel；
First filter circuit includes first resistor and the first capacitance, and the first resistor and the first capacitance are connected；Described
Two filter circuits include second resistance and the second capacitance, and the second resistance and the second capacitance are connected；
The audio frequency processing circuit further includes：
Respectively with first filter circuit and the concatenated 3rd resistor of the second filter circuit；
And the third capacitance in parallel with the 3rd resistor.
2. audio frequency processing circuit as described in claim 1, which is characterized in that one end of the third capacitance and third electricity
One end of resistance is connected to ground altogether；
The other end of the third capacitance is connected to divider altogether with the other end of the 3rd resistor.
3. audio frequency processing circuit as claimed in claim 2, which is characterized in that the divider is the 4th capacitance.
4. audio frequency processing circuit as claimed in claim 3, which is characterized in that first capacitance, the second capacitance and the 4th electricity
It is blocking coupled capacitor to hold.
5. a kind of audio frequency processing system, which is characterized in that including Audio Controller and as described in any one of Claims 1-4
Audio frequency processing circuit；
The Audio Controller includes audio input end, the first audio output, the second audio output；
First audio output is connect by the audio frequency processing circuit with the audio input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820154782.8U CN207752786U (en) | 2018-01-26 | 2018-01-26 | A kind of audio frequency processing circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820154782.8U CN207752786U (en) | 2018-01-26 | 2018-01-26 | A kind of audio frequency processing circuit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207752786U true CN207752786U (en) | 2018-08-21 |
Family
ID=63154241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820154782.8U Expired - Fee Related CN207752786U (en) | 2018-01-26 | 2018-01-26 | A kind of audio frequency processing circuit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207752786U (en) |
-
2018
- 2018-01-26 CN CN201820154782.8U patent/CN207752786U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5699016A (en) | Differential active filter of the second order | |
| CN105721980A (en) | Audio differential signal implementation method | |
| CN106657715B (en) | Vehicle-mounted analog video signal anti-interference system | |
| CN110061940B (en) | Equalizer system | |
| CN205986616U (en) | Multiple filter circuit | |
| CN207752786U (en) | A kind of audio frequency processing circuit and system | |
| EP2319232B1 (en) | Method for driving a ground reference on a signal path, control circuit for driving a ground reference on a signal path, and mobile device | |
| CN105472506A (en) | Microphone circuit audio control circuit | |
| CN105072241A (en) | Anti-sidetone circuit of intercom system isolation transformer | |
| CN205179339U (en) | Audio circuit structure | |
| CN207219030U (en) | Stero set circuit and audio frequency apparatus | |
| CN107799122A (en) | A kind of high biology intends true property speech processes wave filter and speech recognition apparatus | |
| CN107239428A (en) | Can interface circuit | |
| CN105049998A (en) | Audio communication device | |
| CN206892859U (en) | Can interface circuit | |
| CN107979392A (en) | A kind of compensation circuit of transmission signal, method and apparatus | |
| CN107809702A (en) | Signal output apparatus | |
| CN209852237U (en) | Signal regulating circuit of intelligent control system of green automobile | |
| CN206350063U (en) | Vehicle-mounted analog video signal jamproof system | |
| CN208079033U (en) | Multi-channel PWM synthesizes analogue signal circuit | |
| CN110166384A (en) | A kind of differential signal transmission circuit and communication device | |
| CN207625765U (en) | A kind of double Bluetooth audio frequency circuits and its speaker | |
| CN209218050U (en) | Stereo emulator based on RC double-T network | |
| CN202310028U (en) | Mini microphone | |
| CN102142701B (en) | Handheld equipment charging device adopting stereo equipment for supplying power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 519085 the 1609 unit of the 16 floor of A District, No. 1 tangle Road, Tangjia Bay, Zhuhai, Guangdong. Patentee after: ZHUHAI BLACK WHALE SOFTWARE Co.,Ltd. Address before: 518000 SED science and technology building, 1 Nanshan District science and technology road, Shenzhen, Guangdong, 3E Patentee before: SHENZHEN QIANHAI HIJ TECHNOLOGY CO.,LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20220126 |