CN101562426A - Power amplification circuit - Google Patents
Power amplification circuit Download PDFInfo
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- CN101562426A CN101562426A CNA2008103011939A CN200810301193A CN101562426A CN 101562426 A CN101562426 A CN 101562426A CN A2008103011939 A CNA2008103011939 A CN A2008103011939A CN 200810301193 A CN200810301193 A CN 200810301193A CN 101562426 A CN101562426 A CN 101562426A
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- circuit
- power amplification
- amplification circuit
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Abstract
The invention relates to a power amplification circuit, which comprises an amplifying circuit and a voltage regulator circuit; wherein the amplifying circuit is respectively connected with a direct current power supply output end and the voltage regulator circuit; after direct current power supply output electric current passes through the amplifying circuit, amplifying electrical current is output, after the direct current power supply output electric current passes through the voltage regulator circuit, rated electrical current is output; after the two electrical currents are superposed, electronic products are charged; the voltage regulator circuit also outputs the superposition of the two regulated voltages to the electronic products, thus increasing the power of the electronic products. The power amplification circuit amplifies the voltage and electrical current output by the power supply, thus increasing the power of the electronic products, and the power amplification circuit has simple structure and low cost.
Description
Technical field
The present invention relates to a kind of power amplification circuit.
Background technology
Computer, mobile phone and consumption electronic products commonly used all need the power supply power supply at present, after general civil power passes through transformer, rectifier, power to electronic product by filter capacitor and pressurizer again, because the voltage and current of pressurizer output is fixed, also fix so offer the power of electronic product.Thereby export to the power that the curtage raising power supply of electronic product offers electronic product if need to improve power supply, the power that power supply offers electronic product is amplified with regard to needing the baroque power amplifier of extra circuits.The extra power amplifier that increases must increase cost.
Summary of the invention
In view of above content, be necessary to provide a kind of power amplification circuit cheaply.
A kind of power amplification circuit, comprise an amplifying circuit and a voltage stabilizing circuit, described amplifying circuit links to each other with dc power output end and described voltage stabilizing circuit respectively, the DC power supply output current is exported an amplified current behind described amplifying circuit, output one rated current behind described voltage stabilizing circuit, two electric currents superpose the back to the electronic product power supply, and the superposition value that described voltage stabilizing circuit is also exported two burning voltages offers described electronic product, thereby offers the power of described electronic product.
Described power amplification circuit amplifies the voltage and the electric current of power supply output, improved the power that offers electronic product, and described power amplification circuit is simple in structure, cost is lower.
Description of drawings
Below in conjunction with accompanying drawing and better embodiment the present invention is described in further detail:
Fig. 1 is the circuit diagram of power amplification circuit better embodiment of the present invention.
Embodiment
Please refer to Fig. 1, power amplification circuit of the present invention comprises a transformation rectification circuit 100, an amplifying circuit 200, a voltage stabilizing circuit 300 and a filter circuit 400, described transformation rectification circuit 100 comprises a transformer M, one rectifier Z1, described amplifying circuit 200 comprises a field effect transistor T1 and a resistance R 1, described voltage stabilizing circuit 300 comprises a pressurizer W1, a resistance R 2 and a voltage stabilizing didoe D1, and described filter circuit 400 comprises some capacitor C 1, C2 and C3.Wherein, the input of described transformer M links to each other with the both positive and negative polarity of power supply, the output of described transformer M links to each other with input a and the input b of described rectifier Z1, the output c of described rectifier Z1 links to each other with the input 1 of described pressurizer W1 by described resistance R 1, also link to each other with the source electrode of described field effect transistor T1, also link to each other with the negative output terminal of described power amplification circuit by described capacitor C 1, the output d of described rectifier Z1 links to each other with the negative output terminal of described power amplification circuit.The grid of described field effect transistor T1 links to each other with the negative output terminal of described power amplification circuit by described capacitor C 2, also be connected in the input 1 of described pressurizer W1 and the node between the described resistance R 1, drain electrode links to each other with the positive output end of described power amplification circuit, also links to each other with the negative output terminal of described power amplification circuit by described resistance R 2 and described voltage stabilizing didoe D1.The output 2 of described pressurizer W1 is connected in the node between the drain electrode of described resistance R 2 and described field effect transistor T1, the output 3 of described pressurizer W1 is connected in the node between described resistance R 2 and the described voltage stabilizing didoe D1, and described capacitor C 3 is connected between the positive output end and negative output terminal of described power amplification circuit.Wherein said field effect transistor T1 is a PMOS pipe, and as other execution modes, described field effect transistor T1 can be amplifying devices such as triode.
In the power amplification circuit of the present invention, the input current of supposing described pressurizer W1 input 1 is I1, the output current of output 2 is I2 (rated current of pressurizer W1 output), the output current of output 3 is I3, the drain current of described field effect transistor T1 is Id, grid current is Ig, and the electric current on the described resistance R 1 of flowing through is Ir.Described power amplification circuit output galvanic current is pressed and is U, the direct current of output is I, the power output of described power amplification circuit is P=U*I, because electric current I 3 minimum ignoring, then can draw I2=I1=Ir+Ig=-Ugs/R1+Id/ β, β is the current amplification factor of field effect transistor T1 in the formula, and Ugs is the grid of field effect transistor T1 and the voltage between the source electrode.General Ugs=-3 volt, β=10, R1=5 ohm, the I2=1 ampere, then can calculate the Id=4 ampere, output current I=Id+I2=5 ampere, and the rated current I2=1 ampere of pressurizer W1 output, be the rated current of the electric current of power amplification circuit output of the present invention greater than pressurizer W1 output, the output current of visible power amplification circuit increases.
In the power amplification circuit of the present invention, output 2 and the voltage constant between the output 3 of described pressurizer W1 are constant, are made as UR2 (rated voltage of pressurizer W1 output), and the both end voltage of described voltage stabilizing didoe D1 is also invariable, be made as UD1, then can draw U=UR2+UD1.Be U greater than UR2, the voltage of power amplification circuit of the present invention output is greater than the rated voltage of pressurizer W1 output, the output voltage of visible described power amplification circuit increases, the power output of described like this power amplification circuit is that P=(U*I) also increases thereupon.Wherein, the currentamplificationfactor of described field effect transistor T1, the rated current of the resistance of resistance R 1, pressurizer W1 output and the voltage stabilizing value of rated voltage and voltage stabilizing didoe D1, the corresponding numerical value of different electronic components is inequality, therefore can need offer the suitable element of size selection of electronic product power according to reality, output current that obtains expecting and voltage.
Described power amplification circuit amplifies the voltage and the electric current of power supply output, improved the power that offers electronic product, and described power amplification circuit is simple in structure, cost is lower.
Above embodiment is used for illustrating the present invention, and is not to be used as limitation of the invention, as long as within connotation scope of the present invention, to appropriate change and the variation that above embodiment did, all drops within the scope of protection of present invention.
Claims (4)
1. power amplification circuit, comprise an amplifying circuit and a voltage stabilizing circuit, described amplifying circuit links to each other with dc power output end and described voltage stabilizing circuit respectively, the DC power supply output current is exported an amplified current behind described amplifying circuit, output one rated current behind described voltage stabilizing circuit, two electric currents superpose the back to the electronic product power supply, and the superposition value that described voltage stabilizing circuit is also exported two burning voltages offers described electronic product, thereby offers the power of described electronic product.
2. power amplification circuit as claimed in claim 1, it is characterized in that: described amplifying circuit comprises a field effect transistor and one first resistance, described voltage stabilizing circuit comprises a pressurizer, one second resistance and a voltage stabilizing didoe, DC power supply connects first end of described pressurizer by described first resistance, the source electrode that also connects described field effect transistor, the grid of described field effect transistor is connected in first end of described pressurizer and the node between described first resistance, drain electrode connects the positive output end of described power amplification circuit, the negative output terminal that also connects described power amplification circuit by described second resistance and described voltage stabilizing didoe, second end of described pressurizer connects described positive output end, and the 3rd end is connected in the node between described second resistance and the described voltage stabilizing didoe.
3. power amplification circuit as claimed in claim 2, it is characterized in that: described power amplification circuit also comprises a filter circuit, described filter circuit comprises one first electric capacity, one second electric capacity and one the 3rd electric capacity, one end of described first electric capacity links to each other with the negative output terminal of described power amplification circuit, the other end is connected in the node between the source electrode of described first resistance and described field effect transistor, one end of described second electric capacity is connected in the negative output terminal of described power amplification circuit, the other end is connected in the grid of described field effect transistor, node between first end of described pressurizer and described first resistance, described the 3rd electric capacity is connected between the positive output end and negative output terminal of described power amplification circuit.
4. power amplification circuit as claimed in claim 2 is characterized in that: described field effect transistor is a PMOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103011939A CN101562426A (en) | 2008-04-18 | 2008-04-18 | Power amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103011939A CN101562426A (en) | 2008-04-18 | 2008-04-18 | Power amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101562426A true CN101562426A (en) | 2009-10-21 |
Family
ID=41221076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008103011939A Pending CN101562426A (en) | 2008-04-18 | 2008-04-18 | Power amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101562426A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926965A (en) * | 2013-01-16 | 2014-07-16 | 上海华虹集成电路有限责任公司 | Self-biased constant-current voltage stabilizing circuit |
| CN108429307A (en) * | 2018-03-06 | 2018-08-21 | 海汇新能源汽车有限公司 | A kind of battery charging and discharging Adaptable System and device |
| WO2018161449A1 (en) * | 2017-03-10 | 2018-09-13 | 深圳市品川能源电气有限公司 | Electronic switch power amplifier circuit |
-
2008
- 2008-04-18 CN CNA2008103011939A patent/CN101562426A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926965A (en) * | 2013-01-16 | 2014-07-16 | 上海华虹集成电路有限责任公司 | Self-biased constant-current voltage stabilizing circuit |
| CN103926965B (en) * | 2013-01-16 | 2016-04-27 | 上海华虹集成电路有限责任公司 | Automatic biasing constant current voltage stabilizing circuit |
| WO2018161449A1 (en) * | 2017-03-10 | 2018-09-13 | 深圳市品川能源电气有限公司 | Electronic switch power amplifier circuit |
| CN108429307A (en) * | 2018-03-06 | 2018-08-21 | 海汇新能源汽车有限公司 | A kind of battery charging and discharging Adaptable System and device |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091021 |