CN203520860U - Audio signal detection circuit - Google Patents
Audio signal detection circuit Download PDFInfo
- Publication number
- CN203520860U CN203520860U CN201320674186.XU CN201320674186U CN203520860U CN 203520860 U CN203520860 U CN 203520860U CN 201320674186 U CN201320674186 U CN 201320674186U CN 203520860 U CN203520860 U CN 203520860U
- Authority
- CN
- China
- Prior art keywords
- amplifier
- resistance
- resistor
- input
- electric capacity
- 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
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses an audio signal detection circuit which comprises a first amplifier, a second amplifier, a third amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor and a diode. An audio signal input end is respectively connected to the first end of the first capacitor, the first end of the second resistor, the second end of the first capacitor, the anode of the diode, the first end of the first resistor, the output end of the first amplifier, the anti-phase input end of the second amplifier, and the output end of the second amplifier. The second end of the second resistor is grounded. The second end of the second capacitor is respectively connected with the second end of the first resistor and the anti-phase input end of the first amplifier. The positive input end of the first amplifier is connected with a first power supply input end and the high trigger end of the first amplifier. The audio signal detection circuit has the advantages of simple structure and little possibility of external signal interference and has popularization and use values.
Description
Technical field
The utility model relates to a kind of signal deteching circuit, relates in particular to a kind of sound signal testing circuit.
Background technology
Generally speaking, within there is the time frame of Audio Signal Processing, most of typical sound signal is quasi-stationary in essence, and it is slower that this represents that its statistical property (for example, in frequency domain) changes.But, by transient state, to be interrupted and separate be also quite common to this metastable state part.Can define transient state by multitude of different ways, but it is a part for very short signal of duration conventionally, in this duration, statistical property is significantly different from the signal section at its tight front signal part and tight rear thereof.It is to be noted, during betiding original metastable state section according to transient state or it indicates the variation from metastable state part to another metastable state part, this place ahead and rear part also can differ from one another.For not only efficiently but also exactly to given audio-frequency signal coding, need to detect sound signal, traditional most complicated structure of sound signal testing circuit, and be vulnerable to extraneous signal interference.
Utility model content
The purpose of this utility model provides a kind of sound signal testing circuit with regard to being in order to address the above problem.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of sound signal testing circuit, comprise the first amplifier to the three amplifiers, the first resistance to the six resistance, the first electric capacity to the three electric capacity and diode, audio signal input end respectively with the first end of described the first electric capacity, the first end of described the second resistance, the second end of described the first electric capacity, the positive pole of described diode, the first end of described the first resistance, the output terminal of described the first amplifier, the inverting input of described the second amplifier is connected with the output terminal of described the second amplifier, the second end ground connection of described the second resistance, the second end of described the second electric capacity is connected with the inverting input of described the first amplifier with the second end of described the first resistance respectively, the electrode input end of described the first amplifier is connected with the high-triggering end of described the first amplifier with the first power input, the negative input of described the first amplifier is connected with second source input end, the in-phase input end ground connection of described the second amplifier, the negative pole of described diode is connected with the first end of described the 4th resistance with the first end of described the 3rd resistance respectively, the second end ground connection of described the 4th resistance, the second end of described the 3rd resistance is connected with the first end of described the 6th resistance with the first end of described the 3rd electric capacity respectively, the second end ground connection of described the 3rd electric capacity, the second end of described the 6th resistance is connected with the inverting input of described the 3rd amplifier, the in-phase input end of described the 3rd amplifier respectively with the first end of described the 5th resistance, the output terminal of described the 3rd amplifier is connected with detection signal output terminal, the second end of described the 5th resistance is connected with the 3rd power input.
The beneficial effects of the utility model are:
The utility model is a kind of sound signal testing circuit, and it is relatively simple for structure, is not vulnerable to extraneous signal and disturbs, and makes it have the value of promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of sound signal testing circuit of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model is a kind of sound signal testing circuit, comprise the first amplifier IC1 to the three amplifier IC3, the first resistance R 1 is to the 6th resistance R 6, the first capacitor C 1 is to the 3rd capacitor C 3 and diode D, audio signal input end respectively with the first end of the first capacitor C 1, the first end of the second resistance R 2, the second end of the first capacitor C 1, the positive pole of diode D, the first end of the first resistance R 1, the output terminal of the first amplifier IC1, the inverting input of the second amplifier IC2 is connected with the output terminal of the second amplifier IC2, the second end ground connection of the second resistance R 2, the second end of the second capacitor C 2 is connected with the inverting input of the first amplifier IC1 with the second end of the first resistance R 1 respectively, the electrode input end of the first amplifier IC1 is connected with the high-triggering end of the first amplifier IC1 with the first power input, the negative input of the first amplifier IC1 is connected with second source input end, the in-phase input end ground connection of the second amplifier IC2, the negative pole of diode D is connected with the first end of the 4th resistance R 4 with the first end of the 3rd resistance R 3 respectively, the second end ground connection of the 4th resistance R 4, the second end of the 3rd resistance R 3 is connected with the first end of the 6th resistance R 6 with the first end of the 3rd capacitor C 3 respectively, the second end ground connection of the 3rd capacitor C 3, the second end of the 6th resistance R 6 is connected with the inverting input of the 3rd amplifier IC3, the in-phase input end of the 3rd amplifier IC3 respectively with the first end of the 5th resistance R 5, the output terminal of the 3rd amplifier IC3 is connected with detection signal output terminal, the second end of the 5th resistance R 5 is connected with the 3rd power input.
Claims (1)
1. a sound signal testing circuit, it is characterized in that: comprise the first amplifier to the three amplifiers, the first resistance to the six resistance, the first electric capacity to the three electric capacity and diode, audio signal input end respectively with the first end of described the first electric capacity, the first end of described the second resistance, the second end of described the first electric capacity, the positive pole of described diode, the first end of described the first resistance, the output terminal of described the first amplifier, the inverting input of described the second amplifier is connected with the output terminal of described the second amplifier, the second end ground connection of described the second resistance, the second end of described the second electric capacity is connected with the inverting input of described the first amplifier with the second end of described the first resistance respectively, the electrode input end of described the first amplifier is connected with the high-triggering end of described the first amplifier with the first power input, the negative input of described the first amplifier is connected with second source input end, the in-phase input end ground connection of described the second amplifier, the negative pole of described diode is connected with the first end of described the 4th resistance with the first end of described the 3rd resistance respectively, the second end ground connection of described the 4th resistance, the second end of described the 3rd resistance is connected with the first end of described the 6th resistance with the first end of described the 3rd electric capacity respectively, the second end ground connection of described the 3rd electric capacity, the second end of described the 6th resistance is connected with the inverting input of described the 3rd amplifier, the in-phase input end of described the 3rd amplifier respectively with the first end of described the 5th resistance, the output terminal of described the 3rd amplifier is connected with detection signal output terminal, the second end of described the 5th resistance is connected with the 3rd power input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674186.XU CN203520860U (en) | 2013-10-29 | 2013-10-29 | Audio signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674186.XU CN203520860U (en) | 2013-10-29 | 2013-10-29 | Audio signal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203520860U true CN203520860U (en) | 2014-04-02 |
Family
ID=50379754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320674186.XU Expired - Fee Related CN203520860U (en) | 2013-10-29 | 2013-10-29 | Audio signal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203520860U (en) |
-
2013
- 2013-10-29 CN CN201320674186.XU patent/CN203520860U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204188702U (en) | A kind of current detection circuit | |
| CN203720778U (en) | Circuit for wakening host by USB peripheral | |
| CN207354224U (en) | Power amplification circuit for speaker of voice box | |
| CN203520860U (en) | Audio signal detection circuit | |
| CN203563026U (en) | Low-pass buffer filter circuit | |
| CN203193881U (en) | Electret microphone protection circuit | |
| CN203632625U (en) | Signal acquisition-amplification circuit | |
| CN203563186U (en) | Noise reduction circuit and voice audio driving circuit provided with same | |
| CN203491982U (en) | Simple broadband signal amplification circuit for computer network processing unit | |
| CN203857978U (en) | Novel low noise wave detector circuit | |
| CN204578484U (en) | A kind of amplifying circuit strengthened for electric capacity miaow head signal | |
| CN204697020U (en) | A kind of dual output constant current-supplying circuit for preamplifier | |
| CN204206134U (en) | A kind of high speed clocked comparator | |
| CN203225708U (en) | Instrumentation amplifier circuit | |
| CN206225002U (en) | Sound transducer circuit | |
| CN203563017U (en) | Power amplifier for mobile phone | |
| CN204719050U (en) | A kind of microplate reader micro-signal treatment circuit | |
| CN203563015U (en) | Novel power amplifier for mobile phone | |
| CN203563018U (en) | Low-power-dissipation power amplifier for mobile phones | |
| CN203224743U (en) | Signal processing circuit used for pressure sensor | |
| CN206302441U (en) | A kind of fire telephone internal circuit of the voice restoration technology based on PWM | |
| CN204334490U (en) | A kind of virtual protection amplifying circuit | |
| CN104467698A (en) | Logic protection amplification circuit | |
| CN203492094U (en) | Circuit for monitoring video amplifier | |
| CN203563012U (en) | High-stability amplifier for mobile phone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20151029 |
|
| EXPY | Termination of patent right or utility model |