CN201130928Y - Popping elimination circuit - Google Patents
Popping elimination circuit Download PDFInfo
- Publication number
- CN201130928Y CN201130928Y CNU2007201942922U CN200720194292U CN201130928Y CN 201130928 Y CN201130928 Y CN 201130928Y CN U2007201942922 U CNU2007201942922 U CN U2007201942922U CN 200720194292 U CN200720194292 U CN 200720194292U CN 201130928 Y CN201130928 Y CN 201130928Y
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- China
- Prior art keywords
- electric
- controlled switch
- terminal
- sonic boom
- power supply
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- Expired - Lifetime
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Abstract
The utility model relates to an eliminating circuit of noises of shock wave, comprising: a power supply, a grounding end, and a loudspeaker; a amplifier of source of sound, both ends are respectively connected with the power supply and one end of the loudspeaker; a delay element, one end of the delay element is connected with the power supply; a first electric control switch, which has a control terminal and two breakover terminals, and the control terminal is connected with the delay element, the first breakover terminal is connected with the other end of the loudspeaker; and a second electric control switch, which has a control terminal and two breakover terminals, the control terminal is connected with the delay element, and the two breakover terminals are respectively connected with the grounding terminal and the second breakover terminal of the first electric control switch. The shockwave noise eliminating device has an advantage of achieving the effect of complete elimination of noises of shock wave.
Description
Technical field
The utility model relates to electronic circuit, is meant a kind of sonic boom elimination circuit that can eliminate the sonic boom situation of audio output device when start especially.
Background technology
General audio output device has the sonic boom phenomenon when start.This is that it is voice signal that surging is mistaken as, and again via the effect of amplifying circuit, makes surging transfer sonic boom to through amplification, and becomes the problem of improvement because when start, the state of power supply is still unstable.
TaiWan, China announces " shock-wave noise preventing circuit " patent of invention I275312 number, promptly has been to solve the sonic boom problem to develop the technology that.It has exposed a kind of framework in parallel of two-transistor in DESCRIPTION OF THE PRIOR ART, it mainly is to start earlier this two-transistor before power initiation, by to reach the effect of eliminating sonic boom.
Yet this kind uses transistorized technology, only can accomplish to reduce the voltage of surging at most, can not eliminate surging fully, its reason is that transistor still has bias voltage between 0V-0.2V, therefore still has sonic boom situation slightly, and it does not solve the problem of sonic boom fully.
The utility model content
The utility model purpose is, provides a kind of sonic boom to eliminate circuit, and it can eliminate the sonic boom of audio output device when start.
Edge is in order to reach aforementioned advantages, according to a kind of sonic boom elimination circuit provided by the utility model, to include: a power supply, an earth terminal and a loud speaker; One sound source amplifier, two ends are connected to an end of this power supply and this loud speaker; One delay cell, an end of this delay cell is connected in this power supply; One first electric-controlled switch has a control end and two conduction terminal, and this control end is connected with this delay cell, and its first conduction terminal is connected in the other end of this loud speaker; And one second electric-controlled switch, having a control end and two conduction terminal, this control end is to be connected with this delay cell, and this two conduction terminal is connected to second conduction terminal of this earth terminal and this first electric-controlled switch.
The beneficial effects of the utility model are, mainly be when sonic boom produces, temporarily to allow lines of loudspeakers can't form the loop and not conducting earlier, therefore promptly can not send any sound that comprises sonic boom, can exempt the problem of sonic boom fully, and have the effect that is better than prior art, can reach the effect of eliminating sonic boom fully.
Description of drawings
Fig. 1 is the circuit structure diagram of the utility model one embodiment.
[primary clustering symbol description]
10 sonic booms are eliminated circuit
11 loud speakers, 15 sound source amplifiers
21 delay cells
GND earth terminal Vcc power supply
C electric capacity
The Q1 first electric-controlled switch Q2 second electric-controlled switch G grid
S source electrode D drain electrode
Embodiment
In order to describe circuit structure of the present utility model and characteristics place in detail, now for a following embodiment and cooperate graphic explanation as after, wherein:
As shown in Figure 1, a kind of sonic boom that the utility model one embodiment is provided is eliminated circuit 10, mainly formed by a power Vcc, an earth terminal GND, a loud speaker 11, a sound source amplifier 15, a delay cell 21, one first electric-controlled switch Q1 and one second electric-controlled switch Q2, wherein: this sound source amplifier 15, two ends are connected to an end of this power Vcc and this loud speaker 11.This delay cell 21 comprises a resistance R and a capacitor C, and the first end R11 of this resistance R is connected in this power Vcc.And the two ends of this capacitor C are connected to the second end R22 of this earth terminal GND and this resistance R.
This first electric-controlled switch Q1 is the semiconductor switch, is a NMOS (N passage MOSFET) in the present embodiment, has a control end G and two conduction terminal S, D.This control end G is a grid, is connected in the second end R22 of this resistance R, and its first conduction terminal S is a source electrode, and the second conduction terminal D is drain electrode, and this first conduction terminal S is connected in the other end of this loud speaker 11.
This second electric-controlled switch Q2 is the semiconductor switch, is a NMOS (N passage MOSFET) in the present embodiment, has a control end G and two conduction terminal S, D.This control end G is a grid, is connected in the second end R22 of this resistance R, this two conduction terminal S, and D is source electrode and drain electrode, and wherein source S is connected in this earth terminal GND, and drain D then is connected in the second conduction terminal D (i.e. drain electrode) of this first electric-controlled switch Q1.
In addition, the second end R22 of this resistance R also can receive external control signal to this two electric-controlled switch Q1, and Q2 directly controls.
Operating state of the present utility model is described as follows:
When this power Vcc has just begun to power, this sound source amplifier 15 is conducting and starting, this moment, voice signal can be passed to an end of this loud speaker 11, at the same time, because power supply is unstable, therefore, yet the sonic boom that surging produced also is passed in the loud speaker 11 in the lump, and this moment, the control end G current potential of this first electric-controlled switch Q1 and this second electric-controlled switch Q2 promptly was in electronegative potential and not conducting because this capacitor C is still uncharged, therefore, the circuit of these loud speaker 11 other ends promptly can conducting, can't form the loop of voice output, and loud speaker then can't send any sound, therefore, also not having sonic boom occurs.
After power Vcc is powered a period of time, this capacitor C charging is finished, make this two electric-controlled switch Q1, the control end G current potential of Q2 is in high potential and conducting, and therefore, the circuit of these loud speaker 11 other ends is conducting and form the loop of voice output, 11 of loud speakers can be sounded, do not have the phenomenon of abrupt voltage wave because of this power Vcc is stable this moment, and this loud speaker 11 also can not send sonic boom.
Claims (6)
1. a sonic boom is eliminated circuit, it is characterized in that including:
One power supply, an earth terminal and a loud speaker;
One sound source amplifier, two ends are connected to an end of this power supply and this loud speaker;
One delay cell, an end of this delay cell is to be connected in this power supply; One first electric-controlled switch,
Have a control end and two conduction terminal, this control end is to be connected with this delay cell, and it is years old
One conduction terminal then is connected in the other end of this loud speaker; And
One second electric-controlled switch has a control end and two conduction terminal, and this control end is to be connected with this delay cell, and this two conduction terminal is connected to second conduction terminal of this earth terminal and this first electric-controlled switch.
2. eliminate circuit according to the described sonic boom of claim 1, it is characterized in that: this delay cell comprises resistance and an electric capacity, and first end of this resistance is connected in this power supply, and the two ends of this electric capacity then are connected to second end and the earth terminal of this resistance.
3. eliminate circuit according to the described sonic boom of claim 2, it is characterized in that: second end of this resistance is to be connected with the control end of first electric-controlled switch and the control end of second electric-controlled switch.
4. eliminate circuit according to the described sonic boom of claim 1, it is characterized in that: this first electric-controlled switch and this second electric-controlled switch are the semiconductor switches.
5. eliminate circuit according to the described sonic boom of claim 4, it is characterized in that: this first electric-controlled switch and this second electric-controlled switch are NMOS.
6. eliminate circuit according to the described sonic boom of claim 5, it is characterized in that: the control end of this first electric-controlled switch and this second electric-controlled switch is grid, first conduction terminal of this first electric-controlled switch is a source electrode, and its drain electrode is the drain electrode that is connected in this second electric-controlled switch, and the source electrode of this second electric-controlled switch is to be connected in this earth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201942922U CN201130928Y (en) | 2007-12-05 | 2007-12-05 | Popping elimination circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201942922U CN201130928Y (en) | 2007-12-05 | 2007-12-05 | Popping elimination circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201130928Y true CN201130928Y (en) | 2008-10-08 |
Family
ID=40018796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201942922U Expired - Lifetime CN201130928Y (en) | 2007-12-05 | 2007-12-05 | Popping elimination circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201130928Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102572643A (en) * | 2010-12-29 | 2012-07-11 | 佛山普立华科技有限公司 | Plosive eliminating circuit |
| CN101511046B (en) * | 2009-02-24 | 2013-10-09 | 华为终端有限公司 | Audio play apparatus and process capable of eliminating popping |
| CN103368541A (en) * | 2009-07-15 | 2013-10-23 | 立锜科技股份有限公司 | Power-off delay circuit and method, and sound system with power-off delay function |
| CN105489063A (en) * | 2016-01-13 | 2016-04-13 | 吉林航盛电子有限公司 | New energy vehicle pedestrian sound warning device with active early warning function |
| CN106936972A (en) * | 2015-12-30 | 2017-07-07 | 小米科技有限责任公司 | Control method, the apparatus and system of voice-frequency channel |
| CN112511953A (en) * | 2020-09-10 | 2021-03-16 | 美律电子(深圳)有限公司 | Playback apparatus and control method |
-
2007
- 2007-12-05 CN CNU2007201942922U patent/CN201130928Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101511046B (en) * | 2009-02-24 | 2013-10-09 | 华为终端有限公司 | Audio play apparatus and process capable of eliminating popping |
| CN103368541A (en) * | 2009-07-15 | 2013-10-23 | 立锜科技股份有限公司 | Power-off delay circuit and method, and sound system with power-off delay function |
| CN102572643A (en) * | 2010-12-29 | 2012-07-11 | 佛山普立华科技有限公司 | Plosive eliminating circuit |
| CN102572643B (en) * | 2010-12-29 | 2014-03-05 | 佛山普立华科技有限公司 | Plosive eliminating circuit |
| CN106936972A (en) * | 2015-12-30 | 2017-07-07 | 小米科技有限责任公司 | Control method, the apparatus and system of voice-frequency channel |
| CN106936972B (en) * | 2015-12-30 | 2020-10-09 | 小米科技有限责任公司 | Method, device and system for controlling audio channel |
| CN105489063A (en) * | 2016-01-13 | 2016-04-13 | 吉林航盛电子有限公司 | New energy vehicle pedestrian sound warning device with active early warning function |
| CN112511953A (en) * | 2020-09-10 | 2021-03-16 | 美律电子(深圳)有限公司 | Playback apparatus and control method |
| CN112511953B (en) * | 2020-09-10 | 2022-06-07 | 美律电子(深圳)有限公司 | Playback apparatus and control method |
| TWI768466B (en) * | 2020-09-10 | 2022-06-21 | 美律實業股份有限公司 | Playback device and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUANXU ELECTRONICS CO., LTD. Free format text: FORMER OWNER: HUANLONG ELECTRIC CO LTD Effective date: 20110216 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: NANTOU COUNTY, TAIWAN PROVINCE, CHINA TO: 201203 NO. 1558, ZHANGDONG ROAD, ZHANGJIANG HIGH-TECH. PARK, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110216 Address after: 201203 Shanghai Zhangjiang hi tech park, Zhang Road No. 1558 Patentee after: Huanxu Electronics Co., Ltd. Address before: Taiwan Nantou County Chinese Patentee before: Huanlong Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081008 |
|
| CX01 | Expiry of patent term |