CN204244466U - A kind of vehicle audio muting control circuit - Google Patents
A kind of vehicle audio muting control circuit Download PDFInfo
- Publication number
- CN204244466U CN204244466U CN201420727733.0U CN201420727733U CN204244466U CN 204244466 U CN204244466 U CN 204244466U CN 201420727733 U CN201420727733 U CN 201420727733U CN 204244466 U CN204244466 U CN 204244466U
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- vehicle audio
- control circuit
- resistance
- power amplifier
- triode
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Abstract
The utility model relates to vehicle electronic circuit, specifically a kind of vehicle audio muting control circuit, be connected with automobile storage battery power electric, this circuit comprises vehicle audio power amplifier, vehicle audio MCU and loud speaker, it is characterized in that, also comprise dropping resistor, key switch and control circuit, described automobile storage battery power supply is electrically connected dropping resistor and vehicle audio power amplifier respectively; Described dropping resistor, vehicle audio power amplifier and loudspeaker in series connect; The output of described key switch connects the input of vehicle audio MCU, and the output connection control circuit of vehicle audio MCU, the output of control circuit also connects the input of vehicle audio power amplifier.The utility model is improvements over the prior art, thus achieves the quiet handoff functionality of low cost.
Description
Technical field
The utility model relates to a kind of vehicle electronic circuit, specifically a kind of vehicle audio muting control circuit.
Background technology
Along with the prosperity of traffic, all be seen everywhere bus, large mini bus, coach throughout the country, and usually vehicle audio is all provided with on these traffic automobiles, vehicle audio is specially bus, the large vehicles such as mini bus, coach and the vehicular amusement apparatus that designs.In the design process of vehicle audio, need the function determining required for vehicle audio according to the applicable cases of reality, wherein mute function just belongs to the requisite function of vehicle audio.Such as, when driver or passenger receive calls, or when bus arrival reports platform, vehicle audio all needs quiet.The audio signal of vehicle audio is through and outputs to loud speaker after power amplifier amplifies, and therefore the quiet of vehicle audio is exactly quiet to power amplifier enforcement in fact.
Early stage vehicle audio power amplifier integrated level is high, muting control circuit is contained in power amplifier, to realize quiet for this power amplifier, only need to input a high level at its quiet control end just passable, input a zero level and just can cancel quiet.Although this power amplifier integrated level is high, easy to use, also costly, therefore current vehicle audio is less selects this power amplifier to price, and selects and do not comprise muting control circuit, the power amplifier that price comparison is cheap.For this power amplifier, need to realize mute function by additional muting control circuit, although can reduce costs, it is very inconvenient to use.
Summary of the invention
The purpose of this utility model is exactly for existing not containing the defect that the power amplifier of muting control circuit exists in background technology, propose a kind of vehicle audio muting control circuit, this circuit, based on existing vehicle audio power amplifier, can realize the mute function of low cost in power amplifier.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of vehicle audio muting control circuit, be connected with automobile storage battery power electric, this circuit comprises vehicle audio power amplifier, vehicle audio MCU and loud speaker, it is characterized in that, also comprise dropping resistor, key switch and control circuit, described automobile storage battery power supply is electrically connected dropping resistor and vehicle audio power amplifier respectively; Described dropping resistor, vehicle audio power amplifier and loudspeaker in series connect; The output of described key switch connects the input of vehicle audio MCU, and the output connection control circuit of vehicle audio MCU, the output of control circuit also connects the input of vehicle audio power amplifier.
Preferred: the resistance of described dropping resistor is 15K.
Preferred: described control circuit is made up of two-way triode loop, wherein base series one resistance of a road triode, this resistance connects vehicle audio MCU, and the collector electrode of this triode connects vehicle audio power amplifier; The base stage of another road triode is also connected a resistance, this resistance also connects vehicle audio MCU, the grounded emitter of this triode, the collector electrode of this triode is connected two resistance ground connection, and two resistance of connecting with collector electrode are also connected in parallel with the emitter being connected vehicle audio power amplifier triode.
Preferred further: the resistance of the resistance of the base series of described two-way triode is identical, and its resistance is 4.7K.
Another is preferred: the resistance of two resistance of the collector electrode series connection of another road triode described is identical, and its resistance is 12K.
The beneficial effects of the utility model are: this vehicle audio muting control circuit is not containing the improvement that the power amplifier of muting control circuit carries out to existing, the basis of existing power amplifier increases the components and parts of the low cost such as dropping resistor, key switch, achieve the mute function of vehicle audio, also in existing power amplifier, be namely integrated with the control circuit with mute function, compared with the power amplifier that early stage integrated level is high, greatly reduce cost, overcome the awkward defect of power amplifier of the external muting control circuit of the existing need generally used simultaneously.
Accompanying drawing explanation
Fig. 1, composition frame chart of the present utility model;
Fig. 2, the composition frame chart of preferred version in embodiment.
Embodiment
Below in conjunction with accompanying drawing and preferred scheme, embodiment of the present utility model is described in further detail.
As shown in Figure 1, be composition frame chart of the present utility model, specifically a kind of composition frame chart of vehicle audio muting control circuit.This muting control circuit comprises dropping resistor 1, vehicle audio power amplifier 2, loud speaker 3, key switch 4, vehicle audio MCU 5, control circuit 6.Described dropping resistor 1 is all connected automobile storage battery power supply 10 with vehicle audio power amplifier 2, and the voltage of automobile storage battery power supply 10 is the voltage of dropping resistor 1 and vehicle audio power amplifier 2.Described dropping resistor 1 is connected with vehicle audio power amplifier 2, and the output of vehicle audio power amplifier 2 connects loud speaker 3.The output of described key switch 4 connects the input of vehicle audio MCU 5, the output connection control circuit 6 of vehicle audio MCU 5, and the output of control circuit 6 connects vehicle audio power amplifier 2.
Embodiment: the vehicle audio muting control circuit described in the present embodiment adopts preferred scheme composition, and concrete composition frame chart as shown in Figure 2.Dropping resistor 1 in the present embodiment adopts resistance value to be the resistance of 15K, and bus, the large automobile storage battery such as mini bus, coach power supply 10 are generally 24V.Described control circuit 6 is made up of B, C two-way triode loop, wherein base series one resistance of B road triode is the resistance of 4.7K, and this resistance is connected with vehicle audio MCU 5, and tie point is B point, the collector electrode of this triode connects vehicle audio power amplifier 2, and tie point is A point; The base stage of a C road triode resistance of also connecting is the resistance of 4.7K, this resistance is also connected with vehicle audio MCU 5, tie point is C point, the grounded emitter of this triode, the collector electrode of this triode two resistances of connecting are the resistance of 12K, and the emitter of the B road triode be connected with vehicle audio power amplifier 2 and resistance are two resistor coupled in parallel of 12K and ground connection.
Operation principle: the automobile storage battery power supply 10 in the present embodiment is 24V, then the power supply of vehicle audio power amplifier 2 is also 24V.
In the electrical schematic diagram shown in Fig. 2, click key switch 4, the output B point of vehicle audio MCU 5 is set to high level, C point is set to high level, now the triode on C road is in saturation conduction state, the resistance of connecting with the collector electrode of C road triode and C road triode and the earth form path, be equivalent to the resistor coupled in parallel ground connection of emitter by two 15K of B road triode, B road triode is in amplification operating state, selection dropping resistor 1 is the resistance of 15K and two 12K, the current potential making the control end A point of vehicle audio power amplifier 2 is 15V, this current potential is less than 24V and deducts the numerical value that 6V equals 18V, vehicle audio power amplifier is in running order.Click key switch 4 again, vehicle audio MCU 5 output B point is still set to high level, C point is then set to low level, now C road triode cut-off, the emitter of B road triode is only by a 15K grounding through resistance, B road triode is in another kind of amplification operating state, the current potential making the quiet control end A point of vehicle audio power amplifier 2 is 19V, this current potential is less than 24V and deducts the numerical value that 2.5V equals 21.5V, but be greater than 24V and deduct the numerical value that 6V equals 18V, vehicle audio power amplifier is in mute state.By pressing of key switch 4, achieve the mute function of vehicle audio.
Known by the analysis of the operation principle in embodiment, vehicle audio muting control circuit of the present utility model only adds two triodes, five resistance and a key switch in existing power amplifier, these are all the components and parts of low cost, compared with early stage power amplifier, its cost reduces greatly; Only by depresses button switch, just effectively achieve vehicle audio power amplifier normally work and quiet between switching.
Claims (5)
1. a vehicle audio muting control circuit, be electrically connected with automobile storage battery power supply (10), this circuit comprises vehicle audio power amplifier (2), vehicle audio MCU(5) and loud speaker (3), it is characterized in that: also comprise dropping resistor (1), key switch (4) and control circuit (6), described automobile storage battery power supply (10) is electrically connected dropping resistor (1) and vehicle audio power amplifier (2) respectively; Described dropping resistor (1), vehicle audio power amplifier (2) and loud speaker (3) are connected in series; The output of described key switch (4) connects vehicle audio MCU(5) input, vehicle audio MCU(5) output connection control circuit (6), the output of control circuit (6) also connects the input of vehicle audio power amplifier (2).
2. vehicle audio muting control circuit according to claim 1, is characterized in that: the resistance of described dropping resistor (1) is 15K.
3. vehicle audio muting control circuit according to claim 1, it is characterized in that: described control circuit (6) is made up of two-way triode loop, wherein base series one resistance of a road triode, this resistance connects vehicle audio MCU, and the collector electrode of this triode connects vehicle audio power amplifier; The base stage of another road triode is also connected a resistance, this resistance also connects vehicle audio MCU, the grounded emitter of this triode, the collector electrode of this triode is connected two resistance ground connection, and two resistance of connecting with collector electrode are also connected in parallel with the emitter being connected vehicle audio power amplifier triode.
4. vehicle audio muting control circuit according to claim 3, is characterized in that: the resistance of the resistance of the base series of described two-way triode is identical, and its resistance is 4.7K.
5. vehicle audio muting control circuit according to claim 3, is characterized in that: the resistance of two resistance of the collector electrode series connection of another road triode described is identical, and its resistance is 12K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420727733.0U CN204244466U (en) | 2014-11-28 | 2014-11-28 | A kind of vehicle audio muting control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420727733.0U CN204244466U (en) | 2014-11-28 | 2014-11-28 | A kind of vehicle audio muting control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244466U true CN204244466U (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420727733.0U Expired - Fee Related CN204244466U (en) | 2014-11-28 | 2014-11-28 | A kind of vehicle audio muting control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204244466U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196934A (en) * | 2015-10-21 | 2015-12-30 | 重庆金宏汽车电子有限公司 | Muting circuit of navigation equipment |
| CN112153532A (en) * | 2020-09-27 | 2020-12-29 | 上海博泰悦臻网络技术服务有限公司 | Vehicle, vehicle machine with vehicle machine, vehicle machine circuit adaptive to external power amplifier and control method |
-
2014
- 2014-11-28 CN CN201420727733.0U patent/CN204244466U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196934A (en) * | 2015-10-21 | 2015-12-30 | 重庆金宏汽车电子有限公司 | Muting circuit of navigation equipment |
| CN105196934B (en) * | 2015-10-21 | 2017-09-29 | 重庆金宏汽车电子有限公司 | The mute circuit of navigation equipment |
| CN112153532A (en) * | 2020-09-27 | 2020-12-29 | 上海博泰悦臻网络技术服务有限公司 | Vehicle, vehicle machine with vehicle machine, vehicle machine circuit adaptive to external power amplifier and control method |
| CN112153532B (en) * | 2020-09-27 | 2022-07-19 | 上海博泰悦臻网络技术服务有限公司 | Vehicle, vehicle machine with vehicle machine, vehicle machine circuit adaptive to external power amplifier and control method |
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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: 20150401 Termination date: 20181128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |