CN204465847U - A kind of vehicle-mounted BTL voice amplification circuit - Google Patents
A kind of vehicle-mounted BTL voice amplification circuit Download PDFInfo
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- CN204465847U CN204465847U CN201520069195.5U CN201520069195U CN204465847U CN 204465847 U CN204465847 U CN 204465847U CN 201520069195 U CN201520069195 U CN 201520069195U CN 204465847 U CN204465847 U CN 204465847U
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Abstract
The utility model discloses a kind of vehicle-mounted BTL voice amplification circuit, comprise power supply, speech chip, power filter Voltage stabilizing module, chip power supply module and BTL power amplifier module; Described power supply is vehicle-mounted 24V power supply, and described power filter Voltage stabilizing module is to its voltage regulation filtering, and described chip power supply module is powered to described speech chip, and speech chip produces the break-make of difference mode signal by the biased positive and negative half cycle of triode control BTL power amplifier module.Relative to existing technology, the utility model has following advantage: electronic devices and components are few, and cost is low; Owing to being in shallow saturation region when power tube works, power tube itself does not generate heat substantially, its long service life; Width funtion work can be realized, 12V-30V, compatible good; Horn volume is high, and tonequality is good.
Description
Technical field
The utility model relates to power amplification circuit field, is specifically related to a kind of vehicle-mounted BTL voice amplification circuit.
Background technology
School bus loudspeaker use device frequently when being and driving, and are the essential tool ensureing safety of student.The school bus loudspeaker of prior art must reach certain volume and just can meet standard, and it is large that existing amplifying circuit exists volume, the feature that power tube heating is many, and generally needing to install Aluminium Radiator additional could normally use, and electronic devices and components are many, and the life-span is shorter.
Speech chip model is TG020,4 road OTP speech chips, voice signal is converted into numeral by sampling, be stored in the ROM of IC, by circuit, the numeral in ROM is reduced into voice signal again, its first pin, the second pin, the 3rd pin and the 4th pin are signal trigger pin, and its 6th pin and the 8th pin are audio frequency output pin, 5th pin is grounding pin, and the 7th pin connects positive source.
Utility model content
For solving the problems of the technologies described above, we have proposed a kind of vehicle-mounted BTL voice amplification circuit, electronic devices and components are few, and cost is low, and owing to being in shallow saturation region when power tube works, power tube itself does not generate heat substantially, its long service life.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of vehicle-mounted BTL voice amplification circuit, comprises power supply, speech chip, power filter Voltage stabilizing module, chip power supply module and BTL power amplifier module;
Described power supply is vehicle-mounted 24V power supply, and described power filter Voltage stabilizing module comprises diode D1 and capacitor C1, and described diode D1 positive pole connects the positive pole of described power supply, and described diode D1 negative pole is connected with described power cathode by described capacitor C1;
Described BTL module comprises loudspeaker B, power tube Q3, power tube Q4, power tube Q5 and power tube Q6, described power tube Q3 is connected with the positive pole of described capacitor C1 with the emitter of power tube Q4, the emitter of described power tube Q5 is connected with the negative pole of described power supply with the emitter of power tube Q6, described power tube Q3 is connected with one end of described loudspeaker B with the collector electrode of power tube Q5, and the collector electrode of described power tube Q4 is connected with the other end of described loudspeaker B with the collector electrode of described power tube Q6;
Described speech chip first pin, the second pin, the 3rd pin are connected with cab signal circuit with at least one pin in the 4th pin;
Described speech chip the 5th pin is connected with described power cathode, and described speech chip the 7th pin is connected with described chip power supply module;
6th pin of described speech chip and the 8th pin output audio signal, the 6th pin and the 8th pin audio signal anti-phase;
Described 8th pin is connected with the base stage of biased triode Q1 by resistance R5, the emitter of described biased triode Q1 is connected with the base stage of described power tube Q5, and the collector electrode of described biased triode Q1 is connected with the base stage of described power tube Q4 by resistance R8;
Described 6th pin is connected with the base stage of biased triode Q2 by resistance R6, the emitter of described biased triode Q2 is connected with the base stage of described power tube Q6, and the collector electrode of described biased triode Q2 is connected with the base stage of described power tube Q3 by resistance R9.
Preferably, described chip power supply module comprises voltage-stabiliser tube D2, capacitor C2 and resistance R7, the positive pole of described voltage-stabiliser tube D2 is connected with described power cathode with the negative pole of capacitor C2, the positive pole of described voltage-stabiliser tube D2, the positive pole of capacitor C2 are connected with the positive pole of described capacitor C1 by resistance R7, and the 7th pin of described speech chip is connected with the positive pole of described voltage-stabiliser tube D2.
Preferably, described speech chip first pin is connected with vehicle-mounted cab signal circuit A1 by resistance R1; Described speech chip second pin is connected with vehicle-mounted cab signal circuit A2 by resistance R2; Described speech chip the 3rd pin is connected with vehicle-mounted cab signal circuit A4 by resistance R3; Described speech chip the 4th pin is connected with vehicle-mounted cab signal circuit A4 by resistance R4.
Pass through technique scheme, the bell sound burning that school bus needs by the utility model is in described speech chip, when producing when cab signal circuit turn-on, the 6th pin that burning digital signal transition is by speech chip and the 8th pin produce anti-phase audio signal (i.e. difference mode signal), by being biased the connecting and disconnecting of the circuit of the positive and negative half cycle of triode control BTL power amplifier module accordingly.
Relative to existing technology, the utility model has following advantage:
1. electronic devices and components are few, and cost is low;
2. owing to being in shallow saturation region when power tube works, power tube itself does not generate heat substantially, its long service life;
3. can realize Width funtion work, 12V-30V, compatible good;
4. horn volume is high, and tonequality is good.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of a kind of vehicle-mounted BTL voice amplification circuit disclosed in the utility model embodiment 1.
Embodiment
Below in conjunction with embodiment and embodiment, the utility model is described in further detail.
The utility model provides a kind of vehicle-mounted BTL voice amplification circuit, its operation principle is: the bell sound burning needed by school bus is in described speech chip, when producing when cab signal circuit turn-on, the 6th pin that burning digital signal transition is by speech chip and the 8th pin produce anti-phase audio signal (i.e. difference mode signal), during positive half cycle, biased triode Q1 makes power tube Q4 and power tube Q5 conducting form audio frequency amplifying return circuit, during negative half period, biased triode Q2 makes power tube Q3 and power tube Q6 conducting form audio frequency amplifying return circuit, power filter Voltage stabilizing module can well ensure that this circuit is at the disorderly electromagnetic interference steady operation of onboard system, all can normally work at 12V-30V.
Embodiment 1.
As shown in Figure 1, a kind of vehicle-mounted BTL voice amplification circuit, comprises power supply, speech chip, power filter Voltage stabilizing module, chip power supply module and BTL power amplifier module;
Described power supply is vehicle-mounted 24V power supply, and described power filter Voltage stabilizing module comprises diode D1 and capacitor C1, and described diode D1 positive pole connects the positive pole of described power supply, and described diode D1 negative pole is connected with described power cathode by described capacitor C1;
Described BTL module comprises loudspeaker B, power tube Q3, power tube Q4, power tube Q5 and power tube Q6, described power tube Q3 is connected with the positive pole of described capacitor C1 with the emitter of power tube Q4, the emitter of described power tube Q5 is connected with the negative pole of described power supply with the emitter of power tube Q6, described power tube Q3 is connected with one end of described loudspeaker B with the collector electrode of power tube Q5, and the collector electrode of described power tube Q4 is connected with the other end of described loudspeaker B with the collector electrode of described power tube Q6;
Described speech chip first pin, the second pin, the 3rd pin are connected with cab signal circuit with at least one pin in the 4th pin;
Described speech chip the 5th pin is connected with described power cathode, and described speech chip the 7th pin is connected with described chip power supply module;
6th pin of described speech chip and the 8th pin output audio signal, the 6th pin and the 8th pin audio signal anti-phase;
Described 8th pin is connected with the base stage of biased triode Q1 by resistance R5, the emitter of described biased triode Q1 is connected with the base stage of described power tube Q5, and the collector electrode of described biased triode Q1 is connected with the base stage of described power tube Q4 by resistance R8;
Described 6th pin is connected with the base stage of biased triode Q2 by resistance R6, the emitter of described biased triode Q2 is connected with the base stage of described power tube Q6, and the collector electrode of described biased triode Q2 is connected with the base stage of described power tube Q3 by resistance R9;
Described chip power supply module comprises voltage-stabiliser tube D2, capacitor C2 and resistance R7, the positive pole of described voltage-stabiliser tube D2 is connected with described power cathode with the negative pole of capacitor C2, the positive pole of described voltage-stabiliser tube D2, the positive pole of capacitor C2 are connected with the positive pole of described capacitor C1 by resistance R7, and the 7th pin of described speech chip is connected with the positive pole of described voltage-stabiliser tube D2;
Described speech chip first pin is connected with vehicle-mounted cab signal circuit A1 by resistance R1; Described speech chip second pin is connected with vehicle-mounted cab signal circuit A2 by resistance R2; Described speech chip the 3rd pin is connected with vehicle-mounted cab signal circuit A4 by resistance R3; Described speech chip the 4th pin is connected with vehicle-mounted cab signal circuit A4 by resistance R4.
Pass through technique scheme, the bell sound burning that school bus needs by the utility model is in described speech chip, when producing when cab signal circuit turn-on, the 6th pin that burning digital signal transition is by speech chip and the 8th pin produce anti-phase audio signal (i.e. difference mode signal), by being biased the connecting and disconnecting of the circuit of the positive and negative half cycle of triode control BTL power amplifier module accordingly.
Relative to existing technology, the utility model has following advantage:
1. electronic devices and components are few, and cost is low;
2. owing to being in shallow saturation region when power tube works, power tube itself does not generate heat substantially, its long service life;
3. can realize Width funtion work, 12V-30V, compatible good
4. horn volume is high, and tonequality is good.
Above-described is only one of the present utility model vehicle-mounted BTL voice amplification circuit preferred implementation; should be understood that; for the person of ordinary skill of the art; under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (3)
1. a vehicle-mounted BTL voice amplification circuit, is characterized in that, comprises power supply, speech chip, power filter Voltage stabilizing module, chip power supply module and BTL power amplifier module;
Described power supply is vehicle-mounted 24V power supply, and described power filter Voltage stabilizing module comprises diode D1 and capacitor C1, and described diode D1 positive pole connects the positive pole of described power supply, and described diode D1 negative pole is connected with described power cathode by described capacitor C1;
Described BTL module comprises loudspeaker B, power tube Q3, power tube Q4, power tube Q5 and power tube Q6, described power tube Q3 is connected with the positive pole of described capacitor C1 with the emitter of power tube Q4, the emitter of described power tube Q5 is connected with the negative pole of described power supply with the emitter of power tube Q6, described power tube Q3 is connected with one end of described loudspeaker B with the collector electrode of power tube Q5, and the collector electrode of described power tube Q4 is connected with the other end of described loudspeaker B with the collector electrode of described power tube Q6;
Described speech chip first pin, the second pin, the 3rd pin are connected with cab signal circuit with at least one pin in the 4th pin;
Described speech chip the 5th pin is connected with described power cathode, and described speech chip the 7th pin is connected with described chip power supply module;
6th pin of described speech chip and the 8th pin output audio signal, the 6th pin and the 8th pin audio signal anti-phase;
Described 8th pin is connected with the base stage of biased triode Q1 by resistance R5, the emitter of described biased triode Q1 is connected with the base stage of described power tube Q5, and the collector electrode of described biased triode Q1 is connected with the base stage of described power tube Q4 by resistance R8;
Described 6th pin is connected with the base stage of biased triode Q2 by resistance R6, the emitter of described biased triode Q2 is connected with the base stage of described power tube Q6, and the collector electrode of described biased triode Q2 is connected with the base stage of described power tube Q3 by resistance R9.
2. the vehicle-mounted BTL voice amplification circuit of one according to claim 1, it is characterized in that, described chip power supply module comprises voltage-stabiliser tube D2, capacitor C2 and resistance R7, the positive pole of described voltage-stabiliser tube D2 is connected with described power cathode with the negative pole of capacitor C2, the positive pole of described voltage-stabiliser tube D2, the positive pole of capacitor C2 are connected with the positive pole of described capacitor C1 by resistance R7, and the 7th pin of described speech chip is connected with the positive pole of described voltage-stabiliser tube D2.
3. the vehicle-mounted BTL voice amplification circuit of one according to claim 2, is characterized in that, described speech chip first pin is connected with vehicle-mounted cab signal circuit A1 by resistance R1; Described speech chip second pin is connected with vehicle-mounted cab signal circuit A2 by resistance R2; Described speech chip the 3rd pin is connected with vehicle-mounted cab signal circuit A4 by resistance R3; Described speech chip the 4th pin is connected with vehicle-mounted cab signal circuit A4 by resistance R4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520069195.5U CN204465847U (en) | 2015-01-29 | 2015-01-29 | A kind of vehicle-mounted BTL voice amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520069195.5U CN204465847U (en) | 2015-01-29 | 2015-01-29 | A kind of vehicle-mounted BTL voice amplification circuit |
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| Publication Number | Publication Date |
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| CN204465847U true CN204465847U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520069195.5U Expired - Fee Related CN204465847U (en) | 2015-01-29 | 2015-01-29 | A kind of vehicle-mounted BTL voice amplification circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995564A (en) * | 2018-01-25 | 2018-05-04 | 东莞市源康电子有限公司 | A kind of audio amplifier circuit of negative and positive dual power power supply |
-
2015
- 2015-01-29 CN CN201520069195.5U patent/CN204465847U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995564A (en) * | 2018-01-25 | 2018-05-04 | 东莞市源康电子有限公司 | A kind of audio amplifier circuit of negative and positive dual power power supply |
| CN107995564B (en) * | 2018-01-25 | 2023-08-08 | 东莞市源康电子有限公司 | Audio amplifying circuit powered by positive and negative dual power supplies |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20180129 |