CN205039785U - Portable instrument's power amplification circuit - Google Patents
Portable instrument's power amplification circuit Download PDFInfo
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- CN205039785U CN205039785U CN201520612659.2U CN201520612659U CN205039785U CN 205039785 U CN205039785 U CN 205039785U CN 201520612659 U CN201520612659 U CN 201520612659U CN 205039785 U CN205039785 U CN 205039785U
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- resistance
- circuit
- electric capacity
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- power
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Abstract
The utility model discloses a portable instrument's power amplification circuit, it is provided with preamplification circuit and inverter circuit, preamplification circuit connection inverter circuit, be provided with amplifier chip IC1, the enlarged input bias circuit of front end in the preamplification circuit, the front end enlargies the input that input bias circuit connects amplifier chip IC1, the front end enlargies input bias circuit and includes resistance R1 and resistance R2, resistance R1 and resistance R2 all connect amplifier chip IC1's negative pole input, resistance R2 connects amplifier chip IC1's output, amplifier chip IC1's positive input terminal passes through electric capacity C2 ground connection, adopts BTL audio power amplifier principles of design's a power amplification circuit, only needs few component to make and forms, and distinctive park mode can further reduce the consumption, and has the characteristic that output does not need external coupling capacitance or bootstrapping electric capacity and buffer network.
Description
Technical field
The utility model relates to electronic circuit technology field, specifically, is a kind of power amplification circuit of portable set.
Background technology
Power amplifier is called for short power amplifier, and being commonly called as " sound amplifier ", is equipment the most basic in sound system, and its task is that the ultra-weak electronic signal from signal source (being then from sound console in professional sound system) is carried out amplifying to drive loud speaker to sound.
The effect of power amplifier is exactly the small signals amplification from source of sound or pre-amplifier, promotes audio amplifier sound reproduction.The effect of a set of good sound system power amplifier is performed meritorious deeds never to be obliterated.
Power amplifier is a family maximum in all kinds of sound appliances, its effect mainly source of sound equipment is inputted after comparatively small-signal is amplified, produce enough large electric current and go to promote the playback that loud speaker carries out sound.Owing to considering power, impedance, distortion, the dynamic and different scopes of application and regulating and controlling function, also different in the signal transacting of different power amplifiers in inside, line design and production technology.
And a small and exquisite and power amplifier that power is powerful is real in needed for urgently in some portable sets.
Utility model content
The purpose of this utility model is the power amplification circuit providing a kind of portable set, solve needed for portable set power amplifier, adopt a power amplification circuit of BTL audio frequency power amplifier principle design, when designing and producing, few element is only needed to be made, in use, its distinctive park mode, power consumption can be reduced further, and there is the characteristic that output do not need external coupling capacitance or bootstrap capacitor and buffer network.
The utility model is achieved through the following technical solutions: a kind of power amplification circuit of portable set, and it is provided with pre-amplification circuit and inverter circuit, and described pre-amplification circuit connects inverter circuit.
Further, for better realizing the utility model, be arranged to following structure especially: be provided with amplifier chip IC1, front end amplification input biasing circuit in described pre-amplification circuit, the input that input biasing circuit connects amplifier chip IC1 is amplified in described front end; Described front end is amplified input biasing circuit and is comprised resistance R1 and resistance R2, and described resistance R1 and resistance R2 all connects the negative input of amplifier chip IC1; Described resistance R2 connects the output of amplifier chip IC1; The electrode input end of described amplifier chip IC1 is by electric capacity C2 ground connection.
Further, for better realizing the utility model, be arranged to following structure especially: described inverter circuit comprises inverter chip IC 2, negative pole input biasing circuit and positive pole input biasing circuit, described positive pole input biasing circuit comprises resistance R4 and resistance R7, described resistance R4 and resistance R7 is all connected on the electrode input end of inverter chip IC 2, described resistance R7 ground connection, described resistance R4 meets power vd D, and power vd D is also by electric capacity C3 ground connection; Described negative pole input biasing circuit comprises resistance R5, and the output of described amplifier chip IC1 is connected with the negative input of inverter chip IC 2 by resistance R5.
Further, for better realizing the utility model, be arranged to following structure especially: between the negative input and output of described inverter chip IC 2, be also provided with resistance R6.
Further, for better realizing the utility model, be arranged to following structure especially: described power vd D is also connected with the electrode input end of inverter chip IC 2 by resistance R3, and is provided with K switch between resistance R3 and ground.
Further, for better realizing the utility model, be arranged to following structure especially: also comprise the electric capacity C1 for input filter, described electric capacity C1 is connected with resistance R1.
Further, for better realizing the utility model, be arranged to following structure especially: described electric capacity C1 adopts the electric capacity of 0.39 μ, described resistance R1, resistance R2 all adopt the resistance of 20K Ω, described electric capacity C2 adopts the electric capacity of 1.0 μ, described electric capacity C3 adopts the electric capacity of 0.1 μ, and described resistance R4 and resistance R7 adopts the resistance of 100K Ω, and described resistance R5 and resistance R6 adopts the resistance of 40K Ω.
Further, for better realizing the utility model, be arranged to following structure especially: described power vd D adopts 5v power supply.
The utility model compared with prior art, has the following advantages and beneficial effect:
The utility model solves needed for portable set power amplifier, adopt a power amplification circuit of BTL audio frequency power amplifier principle design, when designing and producing, few element is only needed to be made, in use, its distinctive park mode, can reduce power consumption further, and has the characteristic that output do not need external coupling capacitance or bootstrap capacitor and buffer network.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment 1:
A kind of power amplification circuit of portable set, solve needed for portable set power amplifier, adopt a power amplification circuit of BTL audio frequency power amplifier principle design, when designing and producing, few element is only needed to be made, in use, its distinctive park mode, power consumption can be reduced further, and there is the characteristic that output do not need external coupling capacitance or bootstrap capacitor and buffer network, be provided with following structure especially: it is provided with pre-amplification circuit and inverter circuit, described pre-amplification circuit connects inverter circuit.
Embodiment 2:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, for better realizing the utility model, as shown in Figure 1, be arranged to following structure especially: be provided with amplifier chip IC1, front end amplification input biasing circuit in described pre-amplification circuit, the input that input biasing circuit connects amplifier chip IC1 is amplified in described front end; Described front end is amplified input biasing circuit and is comprised resistance R1 and resistance R2, and described resistance R1 and resistance R2 all connects the negative input of amplifier chip IC1; Described resistance R2 connects the output of amplifier chip IC1; The electrode input end of described amplifier chip IC1 is by electric capacity C2 ground connection.
Embodiment 3:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, for better realizing the utility model, as shown in Figure 1, be arranged to following structure especially: described inverter circuit comprises inverter chip IC 2, negative pole input biasing circuit and positive pole input biasing circuit, described positive pole input biasing circuit comprises resistance R4 and resistance R7, described resistance R4 and resistance R7 is all connected on the electrode input end of inverter chip IC 2, described resistance R7 ground connection, described resistance R4 meets power vd D, and power vd D is also by electric capacity C3 ground connection; Described negative pole input biasing circuit comprises resistance R5, and the output of described amplifier chip IC1 is connected with the negative input of inverter chip IC 2 by resistance R5.
Embodiment 4:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, for better realizing the utility model, as shown in Figure 1, following structure is arranged to especially: between the negative input and output of described inverter chip IC 2, be also provided with resistance R6.
Embodiment 5:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, for better realizing the utility model, as shown in Figure 1, be arranged to following structure especially: described power vd D is also connected with the electrode input end of inverter chip IC 2 by resistance R3, and is provided with K switch between resistance R3 and ground.
Embodiment 6:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 2-5 any embodiment, further, for better realizing the utility model, as shown in Figure 1, be arranged to following structure especially: also comprise the electric capacity C1 for input filter, described electric capacity C1 is connected with resistance R1.
Embodiment 7:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, for better realizing the utility model, as shown in Figure 1, be arranged to following structure especially: described electric capacity C1 adopts the electric capacity of 0.39 μ, described resistance R1, resistance R2 all adopt the resistance of 20K Ω, described electric capacity C2 adopts the electric capacity of 1.0 μ, described electric capacity C3 adopts the electric capacity of 0.1 μ, and described resistance R4 and resistance R7 adopts the resistance of 100K Ω, and described resistance R5 and resistance R6 adopts the resistance of 40K Ω.
Embodiment 8:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, for better realizing the utility model, is arranged to following structure especially: described power vd D adopts 5v power supply.
In use, the load RL of 8 Ω is connected between amplifier chip IC1 output (out) and inverter chip IC 2 output (out), switch on power and input audio signal to be amplified is introduced by electric capacity C1, after enlarge leadingly, promoting load RL by the audio system after inverter circuit carry out work.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present utility model, all falls within protection range of the present utility model.
Claims (7)
1. a power amplification circuit for portable set, is characterized in that: it is provided with pre-amplification circuit and inverter circuit, and described pre-amplification circuit connects inverter circuit; Be provided with amplifier chip IC1, front end amplification input biasing circuit in described pre-amplification circuit, the input that input biasing circuit connects amplifier chip IC1 is amplified in described front end; Described front end is amplified input biasing circuit and is comprised resistance R1 and resistance R2, and described resistance R1 and resistance R2 all connects the negative input of amplifier chip IC1; Described resistance R2 connects the output of amplifier chip IC1; The electrode input end of described amplifier chip IC1 is by electric capacity C2 ground connection.
2. the power amplification circuit of a kind of portable set according to claim 1, it is characterized in that: described inverter circuit comprises inverter chip IC 2, negative pole input biasing circuit and positive pole input biasing circuit, described positive pole input biasing circuit comprises resistance R4 and resistance R7, described resistance R4 and resistance R7 is all connected on the electrode input end of inverter chip IC 2, described resistance R7 ground connection, described resistance R4 meets power vd D, and power vd D is also by electric capacity C3 ground connection; Described negative pole input biasing circuit comprises resistance R5, and the output of described amplifier chip IC1 is connected with the negative input of inverter chip IC 2 by resistance R5.
3. the power amplification circuit of a kind of portable set according to claim 2, is characterized in that: between the negative input and output of described inverter chip IC 2, be also provided with resistance R6.
4. the power amplification circuit of a kind of portable set according to claim 3, is characterized in that: described power vd D is also connected with the electrode input end of inverter chip IC 2 by resistance R3, and is provided with K switch between resistance R3 and ground.
5. the power amplification circuit of a kind of portable set according to any one of claim 1-4, is characterized in that: also comprise the electric capacity C1 for input filter, and described electric capacity C1 is connected with resistance R1.
6. the power amplification circuit of a kind of portable set according to claim 5, it is characterized in that: described electric capacity C1 adopts the electric capacity of 0.39 μ, described resistance R1, resistance R2 all adopt the resistance of 20K Ω, described electric capacity C2 adopts the electric capacity of 1.0 μ, described electric capacity C3 adopts the electric capacity of 0.1 μ, described resistance R4 and resistance R7 adopts the resistance of 100K Ω, and described resistance R5 and resistance R6 adopts the resistance of 40K Ω.
7. the power amplification circuit of a kind of portable set according to claim 6, is characterized in that: described power vd D adopts 5v power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520612659.2U CN205039785U (en) | 2015-08-14 | 2015-08-14 | Portable instrument's power amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520612659.2U CN205039785U (en) | 2015-08-14 | 2015-08-14 | Portable instrument's power amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205039785U true CN205039785U (en) | 2016-02-17 |
Family
ID=55298653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520612659.2U Expired - Fee Related CN205039785U (en) | 2015-08-14 | 2015-08-14 | Portable instrument's power amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205039785U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024659A (en) * | 2015-08-14 | 2015-11-04 | 成都易思科科技有限公司 | Power amplifying circuit of portable equipment |
-
2015
- 2015-08-14 CN CN201520612659.2U patent/CN205039785U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024659A (en) * | 2015-08-14 | 2015-11-04 | 成都易思科科技有限公司 | Power amplifying circuit of portable equipment |
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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: 20160217 Termination date: 20160814 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |