CN2327140Y - Active voice-box with automatic power-supply switch - Google Patents
Active voice-box with automatic power-supply switch Download PDFInfo
- Publication number
- CN2327140Y CN2327140Y CN 97228379 CN97228379U CN2327140Y CN 2327140 Y CN2327140 Y CN 2327140Y CN 97228379 CN97228379 CN 97228379 CN 97228379 U CN97228379 U CN 97228379U CN 2327140 Y CN2327140 Y CN 2327140Y
- Authority
- CN
- China
- Prior art keywords
- unit
- power supply
- supply switch
- audio amplifier
- automatic power
- 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
Abstract
The utility model relates to an active sound box with an automatic power supply switch. The utility model comprises the automatic power supply switch, a main power supply unit and a main circuit unit, wherein, the automatic power supply switch is composed of a high input impedance amplifying unit, a limiting amplitude unit, a phase lock unit, a timing unit, a performance unit, a rectifying voltage-stabilizing unit and an auxiliary voltage transformation unit. The on-off of the active sound box can be automatically controlled through a sound frequency signal of a sound source device. Therefore, the utility model has the advantages that the usage is convenient; electrical energy is economized; when the active sound box is communicated with electricity for a long time, an unexpected accident easily happens, and the utility model can avoid the unexpected accident.
Description
The utility model is a kind of active audio amplifier with automatic switch, belongs to stereo set.
The active audio amplifier of current manual power switch need provide audio signal by audiogenic device, when this audio amplifier and audiogenic device (computer; When walkman audio player etc.) connecting, because the needs of listening to, on the audiogenic device next door, they do not have common mains switch to the active audio amplifier riding position, need control the mains switch of audiogenic device and active audio amplifier respectively, therefore be not easy to use, active audio amplifier signal noise ratio height is not almost heard sound when no sound source signal is imported in addition, therefore often has to forget that the situation of turn-offing the active audio amplifier power supply takes place, not only waste electric energy, also be prone to accidents.
The utility model is contained in automatic power supply switch in the active audio amplifier, the active audio amplifier of making the band automatic power supply switch just can address the above problem, the playback signal control that automatic power supply switch is provided by audiogenic device, when the power supply of opening audiogenic device produces the playback signal, automatic power supply switch is closed immediately, partly powers to the active audio amplifier power supply.When power supply of closing audiogenic device or the disappearance of playback signal, the automatic power supply switch delay scheduled time cuts off the power supply of active audio amplifier automatically.
Above-mentioned purpose of the present utility model is realized by following technical scheme, this active audio amplifier is a kind of band automatic power supply switch active audio amplifier, it is characterized in that active audio amplifier comprises automatic power supply switch, main power source unit and main circuit unit, automatic power supply switch is by the high input impedance amplifying unit, the amplitude limit unit, phase locking unit, timing unit, performance element, rectification stable pressuring unit and secondary voltage converter unit are formed, the input controlling signal that automatic power supply switch is required, take from the voice band line input of active audio amplifier, amplify through the high input impedance amplifying unit, amplitude limit unit amplitude limit, form triggering signal after the phase locking unit frequency-selecting and send timing unit, producing control signal after timing unit is triggered makes performance element connect the main power source unit of active audio amplifier, the main power source unit powers to main circuit unit, active audio amplifier is started working, simultaneously the timing unit trigger cycle, the main power source current supply circuit of active audio amplifier is controlled in the output that automatic power supply switch produces.
Therefore the characteristics of the active audio amplifier of this band automatic power supply switch: be the audio signal that only depends on audiogenic device, just can control its switch automatically, have easy to usely, saves energy prevents that active audio amplifier is easy to generate the advantage of easy outer accident because of long-time energising.
Concrete structure of the present utility model is provided by Fig. 1.
Fig. 1 is the structural principle sketch of the active audio amplifier of band automatic power supply switch;
Primary structure is among the figure: active audio amplifier 1, automatic power supply switch 2, high input impedance amplifying unit 3, amplitude limit unit 4, phase locking unit 5, timing unit 6, performance element 7, rectification stable pressuring unit 8, secondary voltage converter unit 9, main power source unit 10, main circuit unit 11.
Below in conjunction with accompanying drawing the utility model is described in detail.
This active audio amplifier (1) is by main power source unit (10), main circuit unit (11) and automatic power supply switch (2) are formed, automatic power supply switch (2) is by high input impedance amplifying unit (3), amplitude limit unit (4), phase locking unit (5), timing unit (6), performance element (7), rectification stable pressuring unit (8) and secondary voltage converter unit (9) are formed, active audio amplifier (1) lining is equipped with automatic power supply switch (2), the required input controlling signal of automatic power supply switch is taken from the voice band line input of active audio amplifier, amplify through high input impedance amplifying unit (3), amplitude limit unit (4) amplitude limit, form triggering signal after phase locking unit (5) frequency-selecting and send timing unit (6), produce control signal after timing unit is triggered and make the main power source (10) of holding unit (7) connection active audio amplifier, main power source is powered to main circuit (11), active audio amplifier is started working, meanwhile the timing unit trigger cycle.Timing unit (6) but have the characteristic (between time delay, can trigger once more and restart new delay cycle) of repeated trigger, under the control of audio signal, active audio amplifier can long time continuous working, if audio signal disappears in delay cycle, then automatic power supply switch cuts off the main power source power supply of active audio amplifier when time-delay stops.The power supply current supply circuit of the output control active audio amplifier that automatic power supply switch produces; Each unit of automatic power supply switch (2), by the secondary voltage converter unit (9) and rectification stable pressuring unit (8) power supply of direct electrical network, the power consumption of automatic power supply switch own is seldom; High input impedance amplifying unit (3) in the active audio amplifier, amplitude limit unit (4), phase locking unit (5), timing unit (6), the available discrete component of rectification stable pressuring unit (8) or integrated circuit constitute, available relay of performance element (7) or bidirectional triode thyristor and circuits for triggering thereof constitute, available inductance step-down of secondary voltage converter unit (9) or resistance-capacitance depressurization.
This automatic power supply switch (2) has highly sensitive (10
-4～10
-3The V level is imported control level), but to background noise (white noise 10
-5V level level) insensitive characteristics also have the characteristics of selecting input control signal to represent frequency, and its quality factor q value height is therefore to continuous high level (10
2The V level) electrical network inductive interference is unaffected, and it selects the response speed suitable (10 of frequency
-3Therefore second level), for high level burst pulse (10
2The V level) impingement is disturbed also unaffected, but the repeated trigger characteristic of timing unit can guarantee automatic switch continuous closure under the control signal effect.To sum up state this automatic power supply switch in practicality, work very stable, dependable performance.
Claims (1)
1. active audio amplifier with automatic power supply switch, it is characterized in that active audio amplifier comprises automatic power supply switch, main power source unit and main circuit unit, automatic power supply switch is by the high input impedance amplifying unit, the amplitude limit unit, phase locking unit, timing unit, performance element, rectification stable pressuring unit and secondary voltage converter unit are formed, the input controlling signal that automatic power supply switch is required, take from the voice band line input of active audio amplifier, amplify through the high input impedance amplifying unit, amplitude limit unit amplitude limit, form triggering signal after the phase locking unit frequency-selecting and send timing unit, producing control signal after timing unit is triggered makes performance element connect the main power source unit of active audio amplifier, the main power source unit powers to main circuit unit, active audio amplifier is started working, simultaneously the timing unit trigger cycle, the main power source current supply circuit of active audio amplifier is controlled in the output that automatic power supply switch produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97228379 CN2327140Y (en) | 1997-10-15 | 1997-10-15 | Active voice-box with automatic power-supply switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97228379 CN2327140Y (en) | 1997-10-15 | 1997-10-15 | Active voice-box with automatic power-supply switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2327140Y true CN2327140Y (en) | 1999-06-30 |
Family
ID=33941551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97228379 Expired - Fee Related CN2327140Y (en) | 1997-10-15 | 1997-10-15 | Active voice-box with automatic power-supply switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2327140Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822075A (en) * | 2008-05-12 | 2010-09-01 | 陈文良 | A kind of novel solar energy wireless sound system |
| CN104333828A (en) * | 2014-10-16 | 2015-02-04 | 苏州合欣美电子科技有限公司 | Adaptive audio control method |
| CN104469573A (en) * | 2014-12-25 | 2015-03-25 | 贵阳裕生万信息技术有限公司 | Loudspeaker box |
-
1997
- 1997-10-15 CN CN 97228379 patent/CN2327140Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822075A (en) * | 2008-05-12 | 2010-09-01 | 陈文良 | A kind of novel solar energy wireless sound system |
| CN104333828A (en) * | 2014-10-16 | 2015-02-04 | 苏州合欣美电子科技有限公司 | Adaptive audio control method |
| CN104469573A (en) * | 2014-12-25 | 2015-03-25 | 贵阳裕生万信息技术有限公司 | Loudspeaker box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |