CN203243288U - Automatic control device of volume - Google Patents
Automatic control device of volume Download PDFInfo
- Publication number
- CN203243288U CN203243288U CN 201320195470 CN201320195470U CN203243288U CN 203243288 U CN203243288 U CN 203243288U CN 201320195470 CN201320195470 CN 201320195470 CN 201320195470 U CN201320195470 U CN 201320195470U CN 203243288 U CN203243288 U CN 203243288U
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- China
- Prior art keywords
- audio
- gain amplifier
- processor
- automatic control
- comparison circuit
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- 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
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- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
Provided is an automatic control device of a volume. The device comprises an audio signal input port, a comparison circuit, a processor, a timer and a gain amplifier. The audio signal input port is connected with the gain amplifier, and is also connected with the processor via the comparison circuit. The processor is also connected with the gain amplifier and the timer. When a state that an audio input signal is larger than a maximum audio threshold or smaller than a minimum audio threshold is detected by the device, the state is maintained for a period of time and then the gain amplifier is started to conduct a gain adjustment on the audio input signal so that an audio adjustment effect is excellent.
Description
Technical field
The utility model relates to a kind of Automatic control of sound volume device.
Background technology
Present sound volume control device is when detecting input signal when excessive or too small, namely carry out gain-adjusted, but owing to need certain hour from detecting, carry out gain-adjusted and discharging gain-adjusted, signal for instantaneous variation can not accurately be regulated, that is to say, present audio control apparatus has reduced whole dynamic range, and is relatively poor to the sound regulating effect.
The utility model content
For the deficiencies in the prior art, the purpose of this utility model is intended to provide a kind of Automatic control of sound volume device, has substantially kept the original dynamic range of sound, and its sound regulating effect is good.
For achieving the above object, the utility model adopts following technical scheme:
A kind of Automatic control of sound volume device, it comprises the audio signal input end mouth, is preset with the comparison circuit of maximal audio threshold value and minimum audio threshold, processor, timer and gain amplifier; The audio signal input end mouth connects gain amplifier, also connects processor by comparison circuit, and processor also connects gain amplifier and timer.
This comparison circuit comprises integrated transporting discharging and the threshold module that is connected with integrated transporting discharging.
This gain amplifier is the chip of LM4819 model.
The beneficial effects of the utility model are as follows:
Above-mentioned utility model is detecting audio input signal greater than the maximal audio threshold value or is keeping certain hour Duan Houcai startup gain amplifier less than minimum audio threshold audio input signal is carried out gain-adjusted, and the audio frequency regulating effect is good.
Description of drawings
Fig. 1 is the module diagram of the preferred embodiments of the utility model Automatic control of sound volume device.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
See also Fig. 1, the utility model relates to a kind of Automatic control of sound volume device, and its preferred embodiments comprises audio signal input end mouth 10, comparison circuit 20, processor 40, timer 30 and gain amplifier 50.
Audio signal input end mouth 10 connects gain amplifier 50, also connects processor 40 by comparison circuit 20, and processor 40 also connects gain amplifier 50 and timer 30.
Audio signal input end mouth 10 is used for the audio reception input signal.
When processor 40 receives the first comparison signal or the second comparison signal, namely start timer 30 and carry out timing, when keeping receiving the first comparison signal or the second comparison signal at very first time section inner treater 40, processor 40 reduces or increases processing by 50 pairs of audio input signals of gain amplifier, so that audio input signal is between minimum audio threshold and the maximal audio threshold value, and keep a period of time.Simultaneously input signal is detected, when input signal in minimum audio threshold between the maximal audio threshold value time, processor 50 ride gain amplifiers 50 discharge gain-adjusted.
In the present embodiment, this gain amplifier 50 is the chip of LM4819 model.This comparison circuit 20 comprises integrated transporting discharging and the threshold module that is connected with integrated transporting discharging.
Above-mentioned utility model is detecting audio input signal greater than the maximal audio threshold value or is keeping 50 pairs of audio input signals of certain hour Duan Houcai startup gain amplifier less than minimum audio threshold and carry out gain-adjusted, and when input signal exceeds minimum audio threshold and maximal audio threshold value, keep this gain always, the dynamic range that has kept well input signal, the audio frequency regulating effect is good.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion should belong within the protection range of the utility model claim all.
Claims (3)
1. Automatic control of sound volume device, it is characterized in that: it comprises the audio signal input end mouth, is preset with the comparison circuit of maximal audio threshold value and minimum audio threshold, processor, timer and gain amplifier; The audio signal input end mouth connects gain amplifier, also connects processor by comparison circuit, and processor also connects gain amplifier and timer.
2. Automatic control of sound volume device as claimed in claim 1, it is characterized in that: this comparison circuit comprises integrated transporting discharging and the threshold module that is connected with integrated transporting discharging.
3. Automatic control of sound volume device as claimed in claim 1, it is characterized in that: this gain amplifier is the chip of LM4819 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195470 CN203243288U (en) | 2013-04-17 | 2013-04-17 | Automatic control device of volume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195470 CN203243288U (en) | 2013-04-17 | 2013-04-17 | Automatic control device of volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243288U true CN203243288U (en) | 2013-10-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320195470 Expired - Fee Related CN203243288U (en) | 2013-04-17 | 2013-04-17 | Automatic control device of volume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243288U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826075A (en) * | 2014-01-26 | 2014-05-28 | 北京京东方显示技术有限公司 | Loudspeaker volume control device, volume adjusting method and audio-visual device |
| CN108041689A (en) * | 2018-02-14 | 2018-05-18 | 深圳市研桥科技有限公司 | Electronic cigarette igniter and its control method |
| CN109660929A (en) * | 2018-12-24 | 2019-04-19 | 广州励丰文化科技股份有限公司 | A kind of speech playing method and device based on electronic tag |
| CN110650410A (en) * | 2019-09-11 | 2020-01-03 | 厦门亿联网络技术股份有限公司 | Microphone automatic gain control method, device and storage medium |
-
2013
- 2013-04-17 CN CN 201320195470 patent/CN203243288U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826075A (en) * | 2014-01-26 | 2014-05-28 | 北京京东方显示技术有限公司 | Loudspeaker volume control device, volume adjusting method and audio-visual device |
| CN108041689A (en) * | 2018-02-14 | 2018-05-18 | 深圳市研桥科技有限公司 | Electronic cigarette igniter and its control method |
| CN109660929A (en) * | 2018-12-24 | 2019-04-19 | 广州励丰文化科技股份有限公司 | A kind of speech playing method and device based on electronic tag |
| CN110650410A (en) * | 2019-09-11 | 2020-01-03 | 厦门亿联网络技术股份有限公司 | Microphone automatic gain control method, device and storage medium |
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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: 20131016 Termination date: 20180417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |