CN203251234U - Switch power supply voltage stabilizing circuit - Google Patents
Switch power supply voltage stabilizing circuit Download PDFInfo
- Publication number
- CN203251234U CN203251234U CN 201320245393 CN201320245393U CN203251234U CN 203251234 U CN203251234 U CN 203251234U CN 201320245393 CN201320245393 CN 201320245393 CN 201320245393 U CN201320245393 U CN 201320245393U CN 203251234 U CN203251234 U CN 203251234U
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- CN
- China
- Prior art keywords
- switch power
- output end
- stabilizing circuit
- output
- triode
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Abstract
The utility model provides a switch power supply voltage stabilizing circuit which is provided with an alternating current input end, a direct current output end, a first transformer connected with the alternating current input end, and a full wave bridge rectifier connected with the first transformer. A filter capacitor which is connected with two output ends of the full wave bridge rectifier, first and second triodes, first and second diodes which are connected in series and a sliding resistor are comprised. First and second triodes use PNP type germanium tubes. The base electrode of the first triode is connected with a grounding end through a first capacitor. The emitter electrode of the second triode is connected with the grounding end through the series branch circuit of first and second diodes. The positive electrode of the direct current output end is connected with the grounding end, and the output voltage is negative.
Description
Technical field
The utility model relates to a kind of power circuit, relates in particular to a kind of switch power voltage-stabilizing circuit that has.
Background technology
Each electronic equipment has again a power circuit of supplying with energy.Majority will be used DC power supply in the common household electrical appliance, and the simplest supply power mode of DC power supply is battery, but the battery cost is too high, and volume is large, and these batteries can not recycle in addition, even if chargeable battery still needs power source charges.
Common power supply all is rectifier power source generally, and civil power is changed into direct voltage, and commonly used will pass through AC transformation, rectification, filtering, the basic functional units such as voltage stabilizing.
Common typical rectification has the switching and rectifying method, and common method for stabilizing voltage has the diode voltage stabilizing.Concerning the circuit that output is had relatively high expectations, adopt the circuit structure more complicated of above method for one, and particularly higher to the requirement of voltage stabilizing didoe, and cost is relatively large.
The utility model content
The purpose of this utility model is to provide a kind of switch power voltage-stabilizing circuit by the tandem type voltage stabilizing of two triodes and the application of polar capacitor and earth terminal, to make stable negative value direct voltage of this switch power voltage-stabilizing circuit output.
The utility model provides a kind of switch power voltage-stabilizing circuit for achieving the above object, has ac input end, dc output end, the first transformer that is connected with this ac input end, the full wave bridge rectifier that is connected with the first transformer, comprise: the filter capacitor that is connected to described full wave bridge rectifier two outputs, first and second triode, first and second diode that is one another in series, one swept resistance, described first and second triode adopts the positive-negative-positive germanium tube, described the first transistor base is connected with earth terminal by the first electric capacity, described the second transistor emitter is connected to described earth terminal by described first and second diode series arm, described dc output end is anodal to be connected with earth terminal, and its output voltage is for negative.
The positive output end sub-connection of the output of described full wave bridge rectifier is to earth terminal, and the negative output terminal is connected to the first transistor collector by the first resistance.
Described filter capacitor and the first electric capacity are polar capacitor, and its positive pole all is connected with earth terminal.
Described the first transistor base is connected to the first electric capacity negative pole, and emitter is connected to described dc output end cathode output end, and is connected to described the second transistor collector by described the second resistance.
Described the second transistor collector is connected to described filter capacitor negative pole by described the 3rd resistance, base stage is connected to described swept resistance control end, this swept resistance is connected in parallel between two lead-out terminals of described dc output end at two ends in addition, also is parallel with one second electric capacity between two lead-out terminals of described dc output end.
In order further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, the utility model is limited.
Description of drawings
Below in conjunction with accompanying drawing, by embodiment of the present utility model is described in detail, will make the technical solution of the utility model and other beneficial effect apparent.
In the accompanying drawing,
Fig. 1 is the connection diagram of the utility model switch power voltage-stabilizing circuit.
Embodiment
Technological means and the effect thereof taked for further setting forth the utility model are described in detail below in conjunction with preferred embodiment of the present utility model and accompanying drawing thereof.
See also Fig. 1, the utility model provides a kind of switch power voltage-stabilizing circuit, has ac input end V
i, dc output end V
o, with this ac input end V
iThe the first transformer T that connects
1, the full wave bridge rectifier D with the first transformer T1 is connected comprises: be connected to described full wave bridge rectifier D two outputs 1,3 filter capacitor C
0, first and second triode VT
1, VT
2, first and second diode VD of being one another in series
5, VD
6, a swept resistance R
p, described first and second triode VT
1, VT
2Adopt the positive-negative-positive germanium tube, described the first triode VT
1Base stage b is by the first capacitor C
1GND is connected with earth terminal, described the second triode VT
2Emitter e is by described first and second diode VD
5, VD
6Series arm is connected to described earth terminal GND, described dc output end V
oPositive pole is connected with earth terminal GND, and its output voltage is for negative.
The positive output terminal 3 of the output of described full wave bridge rectifier D is connected to earth terminal GND, and negative output terminal 1 is by the first resistance R
1Be connected to the first triode VT
1Collector electrode c.
Described filter capacitor C
0And the first capacitor C
1Be polar capacitor, its positive pole all is connected with earth terminal GND.
Described the first triode VT
1Base stage b is connected to the first capacitor C
1Negative pole, emitter e are connected to described dc output end cathode output end, and by described the second resistance R
2Be connected to described the second triode VT
2Collector electrode c.Described the second triode VT
2Collector electrode c is by described the 3rd resistance R
3Be connected to described filter capacitor negative pole, base stage b is connected to described swept resistance R
pControl end, this swept resistance R
pTwo ends are connected in parallel on described dc output end V in addition
oTwo lead-out terminals between, described dc output end V
oTwo lead-out terminals between also be parallel with one second capacitor C
2
The utility model switch power voltage-stabilizing circuit operation principle with above-mentioned connected mode is:
Direct voltage that changes through the amplitude of conversion of described full wave bridge rectifier D output, this voltage is added in described the first triode VT
1Collector electrode c on, guaranteeing this first triode VT
1This voltage is as output voltage output valve dc voltage output end in the situation of conducting, simultaneously described the second triode VT
2By being connected to the swept resistance R of its base stage b
pVariation control described the second triode VT
2, and with described this second triode VT
2Voltage Feedback on the emitter e is given described the first triode VT
1Thereby the fluctuation of offsetting output voltage reaches the purpose of voltage stabilizing.In addition, the triode that described this switch power voltage-stabilizing circuit adopts is the positive-negative-positive triode, simultaneously described filter capacitor C
0And the first capacitor C
1All be that polar capacitor can guarantee that the voltage of exporting is negative value.Negative output voltage will be more stable.
In the switch power voltage-stabilizing circuit of this utility model the canonical parameter of each element or element choose as shown in table 1 below:
| R 1 | 10Ω | C 1 | 100μ | R p | 1KΩ |
| R 2 | 680Ω | C 2 | 100μ | VD 5 | 2CZ82A |
| R 3 | 150Ω | VT 1 | 3AX61 | VD 6 | 2CZ82A |
| C 0 | 500μ | VT 2 | 3AX22 | ? | ? |
Table 1: each component parameters of the utility model switch power voltage-stabilizing circuit and element are chosen form
In sum, the utility model provides a kind of switch power voltage-stabilizing circuit, this switch power voltage-stabilizing circuit can by the serial Feedback voltage stabilizing of two positive-negative-positive triodes and the application of polar capacitor and earth terminal, make stable negative value direct voltage of this switch power voltage-stabilizing circuit output.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model claim.
Claims (5)
1. switch power voltage-stabilizing circuit, has ac input end, dc output end, the first transformer that is connected with this ac input end, the full wave bridge rectifier that is connected with the first transformer, it is characterized in that, comprise: the filter capacitor that is connected to described full wave bridge rectifier two outputs, first and second triode, first and second diode that is one another in series, one swept resistance, described first and second triode adopts the positive-negative-positive germanium tube, described the first transistor base is connected with earth terminal by the first electric capacity, described the second transistor emitter is connected to described earth terminal by described first and second diode series arm, described dc output end is anodal to be connected with earth terminal, and its output voltage is for negative.
2. switch power voltage-stabilizing circuit as claimed in claim 1 is characterized in that, the positive output end sub-connection of the output of described full wave bridge rectifier is to earth terminal, and the negative output terminal is connected to the first transistor collector by the first resistance.
3. switch power voltage-stabilizing circuit as claimed in claim 1 is characterized in that, described filter capacitor and the first electric capacity are polar capacitor, and its positive pole all is connected with earth terminal.
4. switch power voltage-stabilizing circuit as claimed in claim 1, it is characterized in that, described the first transistor base is connected to the first electric capacity negative pole, and emitter is connected to described dc output end cathode output end, and is connected to described the second transistor collector by described the second resistance.
5. switch power voltage-stabilizing circuit as claimed in claim 1, it is characterized in that, described the second transistor collector is connected to described filter capacitor negative pole by described the 3rd resistance, base stage is connected to described swept resistance control end, this swept resistance is connected in parallel between two lead-out terminals of described dc output end at two ends in addition, also is parallel with one second electric capacity between two lead-out terminals of described dc output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320245393 CN203251234U (en) | 2013-05-07 | 2013-05-07 | Switch power supply voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320245393 CN203251234U (en) | 2013-05-07 | 2013-05-07 | Switch power supply voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203251234U true CN203251234U (en) | 2013-10-23 |
Family
ID=49377648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320245393 Expired - Fee Related CN203251234U (en) | 2013-05-07 | 2013-05-07 | Switch power supply voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203251234U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104619071A (en) * | 2013-11-05 | 2015-05-13 | 深圳市海洋王照明工程有限公司 | Lighting control circuit and lamp |
| CN109451218A (en) * | 2018-11-20 | 2019-03-08 | 安徽奕甲文化传媒有限责任公司 | Video camera |
-
2013
- 2013-05-07 CN CN 201320245393 patent/CN203251234U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104619071A (en) * | 2013-11-05 | 2015-05-13 | 深圳市海洋王照明工程有限公司 | Lighting control circuit and lamp |
| CN104619071B (en) * | 2013-11-05 | 2019-06-25 | 深圳市海洋王照明工程有限公司 | A kind of illumination control circuit and lamps and lanterns |
| CN109451218A (en) * | 2018-11-20 | 2019-03-08 | 安徽奕甲文化传媒有限责任公司 | Video camera |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20160507 |