CN202475744U - Power on instant mute circuit - Google Patents
Power on instant mute circuit Download PDFInfo
- Publication number
- CN202475744U CN202475744U CN2012200021682U CN201220002168U CN202475744U CN 202475744 U CN202475744 U CN 202475744U CN 2012200021682 U CN2012200021682 U CN 2012200021682U CN 201220002168 U CN201220002168 U CN 201220002168U CN 202475744 U CN202475744 U CN 202475744U
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- CN
- China
- Prior art keywords
- circuit
- signal line
- control circuit
- moment
- mute
- 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 - Lifetime
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- 238000001914 filtration Methods 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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Abstract
The present utility model provides a power on instant mute circuit which relates to the audio frequency processing technology field. The circuit comprises an audio frequency output circuit, a player master control circuit and a first signal line, one end of the first signal line is connected with a signal output port of the audio frequency output circuit, and the other end of the first signal is connected with a signal input port of the player master control circuit. The circuit is characterized in that the circuit also comprises a mute control circuit and a second signal line, one end of the second signal line is connected with the mute control circuit, and the other end of the second signal line is connected with the first signal line. In the circuit, in the moment of powering on, the mute control circuit is used for filtering pulses instantly generated when the audio frequency output circuit is powered on, thus instant noises of sound equipment will not be generated in the moment of powering on, playing quality can be enhanced, playing equipment can be prevented from being damaged by noises, and the playing equipment is protected.
Description
[technical field]
The utility model relates to the audio signal processing technique field, relates in particular to a kind of start moment noise treatment circuit.
[background technology]
At present, in the electronics playback equipment, the moment of start; The audio output port of audio output circuit has pulse output in the moment of audio frequency output; Through getting into sound equipment after the audio amplifier circuit amplification, get into sound equipment and can produce the moment harsh noise afterwards, possibly cause sound equipment to damage.
[utility model content]
The purpose of the utility model is to overcome in the prior art electronics playback equipment and produces a kind of start moment mute circuit that the deficiency of moment noise provides because momentary pulse is arranged in start moment.
The utility model is realized through following technical scheme: a kind of start moment mute circuit; It comprises audio output circuit, player governor circuit and first holding wire; One end of said first holding wire is connected in the signal output port of said audio output circuit, and the other end of said first holding wire is connected in the signal input port of said player governor circuit; Its improvements are, also comprise muting control circuit and secondary signal line; One end of said secondary signal line is connected in said muting control circuit, and the other end of said secondary signal line is connected in said first holding wire.
The beneficial effect of the utility model is: the circuit of this structure; In the moment of start; Muting control circuit leaches the audio output circuit pulse that moment produces of starting shooting; Thereby make start moment sound equipment can not produce the noise of moment, both improved play quality, also protected playback equipment can not protected playback equipment simultaneously by noise destruction.
[description of drawings]
Fig. 1 is the circuit frame principle figure of the utility model.
Reference numeral: 1, audio output circuit; 2, player governor circuit; 3, muting control circuit.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the utility model is done and to be further described:
With reference to shown in Figure 1; This start moment mute circuit; It comprises audio output circuit 1, player governor circuit 2 and first holding wire; One end of said first holding wire is connected in the signal output port of said audio output circuit 1, and the other end of said first holding wire is connected in the signal input port of said player governor circuit 2; This start moment mute circuit also comprises muting control circuit 3 and secondary signal line; One end of said secondary signal line is connected in said muting control circuit 3, and the other end of said secondary signal line is connected in said first holding wire.
The circuit of this structure; In the moment of start; Muting control circuit 3 leaches the pulse of audio output circuit 1 start moment generation; Thereby make start moment sound equipment can not produce the noise of moment, both improved play quality, also protected playback equipment can not protected playback equipment simultaneously by noise destruction.
According to the announcement and the instruction of above-mentioned specification, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to is in the protection range of the claim that also should fall into the utility model to some modifications and the change of the utility model.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (1)
- One kind the start moment mute circuit; It comprises audio output circuit, player governor circuit and first holding wire; One end of said first holding wire is connected in the signal output port of said audio output circuit, and the other end of said first holding wire is connected in the signal input port of said player governor circuit; It is characterized in that: also comprise muting control circuit and secondary signal line; One end of said secondary signal line is connected in said muting control circuit, and the other end of said secondary signal line is connected in said first holding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200021682U CN202475744U (en) | 2012-01-04 | 2012-01-04 | Power on instant mute circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200021682U CN202475744U (en) | 2012-01-04 | 2012-01-04 | Power on instant mute circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475744U true CN202475744U (en) | 2012-10-03 |
Family
ID=46923865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200021682U Expired - Lifetime CN202475744U (en) | 2012-01-04 | 2012-01-04 | Power on instant mute circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202475744U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547528A (en) * | 2012-01-04 | 2012-07-04 | 深圳市宽宏科技有限公司 | Booting moment mute circuit |
-
2012
- 2012-01-04 CN CN2012200021682U patent/CN202475744U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547528A (en) * | 2012-01-04 | 2012-07-04 | 深圳市宽宏科技有限公司 | Booting moment mute circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Patent of Shenzhen kuanhong Technology Co.,Ltd. The person in charge Document name: Notice of expiration and termination of patent right |