CN203399066U - Level control circuit for radio broadcasting system in industrial production workshop - Google Patents
Level control circuit for radio broadcasting system in industrial production workshop Download PDFInfo
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- CN203399066U CN203399066U CN201320437749.3U CN201320437749U CN203399066U CN 203399066 U CN203399066 U CN 203399066U CN 201320437749 U CN201320437749 U CN 201320437749U CN 203399066 U CN203399066 U CN 203399066U
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- resistance
- triode
- resistor
- electric capacity
- switch
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Abstract
The utility model discloses a level control circuit for a radio broadcasting system in an industrial production workshop, and the circuit comprises a first switch, a second switch, a third switch, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifth resistor, and a sixteenth resistor. The first end of the first switch is connected with the first end of the first resistor and the first end of the second resistor. Compared with a conventional level control circuit in the prior art, the level control circuit provided by the utility model is small in power consumption, simple in circuit structure, and good in stability.
Description
Technical field
The utility model relates to a kind of level control circuit, relates in particular to a kind of level control circuit for industrial production workshop wireless broadcast system.
Background technology
In industrial production workshop, many employing broadcast is notified some important events or order, and level control circuit is requisite auxiliary circuit in broadcast system.The effect of level control circuit is that output level is substantially constant when amplifier incoming level changes in a big way, i.e. amplifier output remains on a relatively constant level.The power consumption of the level control circuit of prior art is larger, and circuit structure is complicated, and the stability of work is also poor.
Utility model content
The purpose of this utility model provides a kind of level control circuit for industrial production workshop wireless broadcast system 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:
For a level control circuit for industrial production workshop wireless broadcast system, comprise the first switch, second switch, the 3rd switch, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first triode, the second triode, the 3rd triode, the 4th triode, the 5th triode, diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance and the 16 resistance, the first end of described the first switch is connected with the first end of described the second resistance with the first end of described the first resistance respectively, the second end of described the first resistance is connected with the base stage of described the second triode with the collector electrode of described the first triode respectively, the second end of described the second resistance is connected with the first end of described the 4th resistance with the first end of described the 3rd resistance respectively, the second end of described the 3rd resistance is connected with the first end of described the second electric capacity with the collector electrode of described the second triode respectively, the second end of described the second electric capacity is connected with the first end of described second switch, the second end of described second switch is connected with the base stage of described the 3rd triode with the first end of described the 5th resistance respectively, the emitter of described the 3rd triode is connected with the first end of described the 11 resistance, the second end ground connection of described the 11 resistance, the collector electrode of described the 3rd triode is connected with the first end of described the 3rd electric capacity with the second end of described the 5th resistance respectively, the second end of described the 3rd electric capacity is connected with the first end of described the 3rd switch, the second end of described the 3rd switch is connected with the first end of described the 15 resistance, the second end of described the 15 resistance is connected with described the 13 first end of resistance and the positive pole of described diode respectively, the negative pole of described diode respectively with the first end of described 12 resistance, the first end of described the 5th electric capacity is connected with the base stage of described the 5th triode, the emitter of the 5th triode is connected with the first end of described the 14 resistance, the second end of described the 14 resistance is the first circuit external connection end, the collector electrode of described the 5th triode is connected with described the 4th transistor base, the second end of described the 13 resistance respectively with the second end of described the 12 resistance, the first end of described the 4th electric capacity, the second end of described the 5th electric capacity, the first end of described the tenth resistance, ground connection after described the 4th collector electrode of triode and the first end of described the 16 resistance are connected, the emitter of described the 4th triode is connected with the first end of described the first electric capacity and the second end of described the first switch respectively, the second end of described the first electric capacity is connected with the first end of described the 8th resistance with the base stage of described the first triode respectively, the second end of described the 8th resistance is connected with the second end of described the 4th electric capacity, the emitter of described the first triode is connected with the first end of described the 6th resistance, the second end of described the 6th resistance is connected with the second end of described the 16 resistance with the first end of described the 9th resistance respectively, the second end of described the 9th resistance is second circuit external connection end, the emitter of described the second triode is connected with the first end of described the 7th resistance, the second end of described the 7th resistance is connected with the second end of described the tenth resistance.
The beneficial effects of the utility model are:
A kind of level control circuit for industrial production workshop wireless broadcast system of the utility model, when recorded audio signals is stronger, the base potential of the 4th triode and the 5th triode is raise, impel the collector current of the 4th triode to increase, recorded audio signals is bypassed to a part, otherwise, when recorded audio signals is weak, recorded audio signals is all input in recording circuit, and the power consumption of the level control circuit of the prior art of comparing is little, and circuit structure is simple, the good stability of work.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of level control circuit for industrial production workshop wireless broadcast system of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of level control circuit for industrial production workshop wireless broadcast system of the utility model, comprises the first switch S 1, second switch S2, the 3rd switch S 3, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the first triode VT1, the second triode VT2, the 3rd triode VT3, the 4th triode VT4, the 5th triode VT5, diode D, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15 and the 16 resistance R 16, the first end of the first switch S 1 is connected with the first end of the second resistance R 2 with the first end of the first resistance R 1 respectively, the second end of the first resistance R 1 is connected with the base stage of the second triode VT2 with the collector electrode of the first triode VT1 respectively, the second end of the second resistance R 2 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 of the 3rd resistance R 3 is connected with the first end of the second capacitor C 2 with the collector electrode of the second triode VT2 respectively, the second end of the second capacitor C 2 is connected with the first end of second switch S2, the second end of second switch S2 is connected with the base stage of the 3rd triode VT3 with the first end of the 5th resistance R 5 respectively, the emitter of the 3rd triode VT3 is connected with the first end of the 11 resistance R 11, the second end ground connection of the 11 resistance R 11, the collector electrode of the 3rd triode VT3 is connected with the first end of the 3rd capacitor C 3 with the second end of the 5th resistance R 5 respectively, the second end of the 3rd capacitor C 3 is connected with the first end of the 3rd switch S 3, the second end of the 3rd switch S 3 is connected with the first end of the 15 resistance R 15, the second end of the 15 resistance R 15 is connected with the positive pole of diode D with the first end of the 13 resistance R 13 respectively, the negative pole of diode D respectively with the first end of 12 resistance R 12, the first end of the 5th capacitor C 5 is connected with the base stage of the 5th triode VT5, the emitter of the 5th triode VT5 is connected with the first end of the 14 resistance R 14, the second end of the 14 resistance R 14 is the first circuit external connection end, the collector electrode of the 5th triode VT5 is connected with the 4th triode VT4 base stage, the second end of the 13 resistance R 13 respectively with the second end of the 12 resistance R 12, the first end of the 4th capacitor C 4, the second end of the 5th capacitor C 5, the first end of the tenth resistance R 10, ground connection after the 4th collector electrode of triode VT4 and the first end of the 16 resistance R 16 are connected, the emitter of the 4th triode VT4 is connected with the second end of the first switch S 1 with the first end of the first capacitor C 1 respectively, the second end of the first capacitor C 1 is connected with the first end of the 8th resistance R 8 with the base stage of the first triode VT1 respectively, the second end of the 8th resistance R 8 is connected with the second end of the 4th capacitor C 4, the emitter of the first triode VT1 is connected with the first end of the 6th resistance R 6, the second end of the 6th resistance R 6 is connected with the second end of the 16 resistance R 16 with the first end of the 9th resistance R 9 respectively, the second end of the 9th resistance R 9 is second circuit external connection end, the emitter of the second triode VT2 is connected with the first end of the 7th resistance R 7, the second end of the 7th resistance R 7 is connected with the second end of the tenth resistance R 10.
The operation principle of a kind of level control circuit for industrial production workshop wireless broadcast system of the utility model is as follows:
When recorded audio signals is stronger, the base potential of the 4th triode VT4 and the 5th triode VT5 is raise, impel the collector current of the 4th triode VT4 to increase, recorded audio signals is bypassed to a part, otherwise when recorded audio signals is weak, recorded audio signals is all input in recording circuit.
Claims (1)
1. for a level control circuit for industrial production workshop wireless broadcast system, it is characterized in that: comprise the first switch, second switch, the 3rd switch, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first triode, the second triode, the 3rd triode, the 4th triode, the 5th triode, diode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance and the 16 resistance, the first end of described the first switch is connected with the first end of described the second resistance with the first end of described the first resistance respectively, the second end of described the first resistance is connected with the base stage of described the second triode with the collector electrode of described the first triode respectively, the second end of described the second resistance is connected with the first end of described the 4th resistance with the first end of described the 3rd resistance respectively, the second end of described the 3rd resistance is connected with the first end of described the second electric capacity with the collector electrode of described the second triode respectively, the second end of described the second electric capacity is connected with the first end of described second switch, the second end of described second switch is connected with the base stage of described the 3rd triode with the first end of described the 5th resistance respectively, the emitter of described the 3rd triode is connected with the first end of described the 11 resistance, the second end ground connection of described the 11 resistance, the collector electrode of described the 3rd triode is connected with the first end of described the 3rd electric capacity with the second end of described the 5th resistance respectively, the second end of described the 3rd electric capacity is connected with the first end of described the 3rd switch, the second end of described the 3rd switch is connected with the first end of described the 15 resistance, the second end of described the 15 resistance is connected with described the 13 first end of resistance and the positive pole of described diode respectively, the negative pole of described diode respectively with the first end of described 12 resistance, the first end of described the 5th electric capacity is connected with the base stage of described the 5th triode, the emitter of the 5th triode is connected with the first end of described the 14 resistance, the second end of described the 14 resistance is the first circuit external connection end, the collector electrode of described the 5th triode is connected with described the 4th transistor base, the second end of described the 13 resistance respectively with the second end of described the 12 resistance, the first end of described the 4th electric capacity, the second end of described the 5th electric capacity, the first end of described the tenth resistance, ground connection after described the 4th collector electrode of triode and the first end of described the 16 resistance are connected, the emitter of described the 4th triode is connected with the first end of described the first electric capacity and the second end of described the first switch respectively, the second end of described the first electric capacity is connected with the first end of described the 8th resistance with the base stage of described the first triode respectively, the second end of described the 8th resistance is connected with the second end of described the 4th electric capacity, the emitter of described the first triode is connected with the first end of described the 6th resistance, the second end of described the 6th resistance is connected with the second end of described the 16 resistance with the first end of described the 9th resistance respectively, the second end of described the 9th resistance is second circuit external connection end, the emitter of described the second triode is connected with the first end of described the 7th resistance, the second end of described the 7th resistance is connected with the second end of described the tenth resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437749.3U CN203399066U (en) | 2013-07-19 | 2013-07-19 | Level control circuit for radio broadcasting system in industrial production workshop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437749.3U CN203399066U (en) | 2013-07-19 | 2013-07-19 | Level control circuit for radio broadcasting system in industrial production workshop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399066U true CN203399066U (en) | 2014-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320437749.3U Expired - Fee Related CN203399066U (en) | 2013-07-19 | 2013-07-19 | Level control circuit for radio broadcasting system in industrial production workshop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203399066U (en) |
-
2013
- 2013-07-19 CN CN201320437749.3U patent/CN203399066U/en not_active Expired - Fee Related
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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: 20140115 Termination date: 20140719 |
|
| EXPY | Termination of patent right or utility model |