CN202353462U - Voltage conversion circuit - Google Patents
Voltage conversion circuit Download PDFInfo
- Publication number
- CN202353462U CN202353462U CN2011205229381U CN201120522938U CN202353462U CN 202353462 U CN202353462 U CN 202353462U CN 2011205229381 U CN2011205229381 U CN 2011205229381U CN 201120522938 U CN201120522938 U CN 201120522938U CN 202353462 U CN202353462 U CN 202353462U
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- circuit
- voltage
- conversion circuit
- resistance
- voltage conversion
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Abstract
The utility model relates to a conversion circuit, in particular to a voltage conversion circuit. The voltage conversion circuit comprises a comparison amplification circuit and a variable resistor control circuit. A positive power supply is connected with one input end of a comparator of the comparison amplification circuit; a sampling circuit is connected with another input end of the comparator of the comparison amplification circuit; and an output signal of the comparison amplification circuit is connected with a variable resistor for controlling a final output effect voltage. The voltage conversion circuit has a simple structure and ingenuous design idea and is stable and reliable to operate. A suitable voltage is output by comparing a power supply voltage with a sampling voltage. By the control of the variable resistor, the effect that the output voltage can be a wanted random value is finally achieved. The voltage conversion circuit can be widely applied to a charger.
Description
Technical field
The utility model relates to a kind of change-over circuit, relates in particular to a kind of voltage conversion circuit.
Background technology
Along with the expansion day by day in application of electronic technology field, the high efficiency of electronic product is the selection of many affect people's more and more, and in order to satisfy people's needs easily, the circuit design of electronic product is conveniently more and more tended to actual demand.The general charger that occurs in the market can only be a kind of voltage of output, can be different to its rated voltage of different power consumption equipments, and at this moment a charger just can not be accomplished, to current allegro life style, this problem has to be solved.
Summary of the invention
The utility model is exactly to the problems referred to above, and a kind of brand-new voltage conversion circuit is provided.
The technical scheme that the utility model provides is:
Voltage conversion circuit; Comprise comparison amplifying circuit, variable resistance control circuit; Cathode power supply connects the relatively input of the comparator of amplifying circuit; Sample circuit connects relatively another input of comparator of amplifying circuit, and relatively amplifying circuit output signal connects the variable resistance of the last output effect voltage of control.
Concrete; Cathode power supply connects relatively amplifying circuit through voltage stabilizing circuit, and said voltage stabilizing circuit is made up of two resistance, two electric capacity and a diode, and two resistance string connect ground; Two respectively parallelly connected electric capacity in resistance two ends, diode then is connected in parallel on two electric capacity two ends.
Concrete, said relatively amplifying circuit comprises comparator and triode, and transistor base connects comparator output terminal, and collector electrode connects variable resistance, grounded emitter.
Concrete, variable resistance of tap after resistance of sample circuit serial connection comes out is to regulate the size of sampling voltage.
The utility model is simple in structure; Design concept is ingenious; Circuit operates steadily reliably, and supply power voltage and sampling voltage are relatively exported a suitable voltage, again through variable-resistance control; Realized that finally output voltage can be the numerical value of wanting arbitrarily, the utility model can be widely used in the charger.
Description of drawings
Fig. 1 is the novel structural representation of this use.
Embodiment
Voltage conversion circuit mainly comprises a voltage stabilizing circuit, comparison amplifying circuit, variable resistance control circuit.Resistance of 15V cathode power supply serial connection connects the relatively comparator of amplifying circuit through voltage stabilizing circuit through another resistance; Resistance of sample circuit serial connection connects relatively another input of comparator of amplifying circuit; Relatively amplifying circuit output signal connects variable resistance, controls last output effect voltage by variable resistance.
Voltage stabilizing circuit is that two resistance string connect ground, two respectively parallelly connected electric capacity in resistance two ends, and diode then is connected in parallel on two electric capacity two ends, and diode cathode ground connection.
Relatively amplifying circuit comprises comparator and triode, and transistor base connects comparator output terminal, and collector electrode connects variable resistance, grounded emitter.Variable resistance of tap after resistance of sampling voltage serial connection comes out is to regulate the size of sampling voltage.Form one group of relatively amplifying circuit by a comparator and a triode, many groups relatively amplifying circuit parallel connection form new comparison amplifying circuit.The adjustable range of new comparison amplifying circuit is bigger.
Claims (4)
1. voltage conversion circuit; It is characterized in that; Comprise comparison amplifying circuit, variable resistance control circuit; Cathode power supply connects the relatively input of the comparator of amplifying circuit, and sample circuit connects relatively another input of comparator of amplifying circuit, and relatively amplifying circuit output signal connects the variable resistance of the last output effect voltage of control.
2. according to the said voltage conversion circuit of claim 1; It is characterized in that; Cathode power supply connects relatively amplifying circuit through voltage stabilizing circuit, and said voltage stabilizing circuit is made up of two resistance, two electric capacity and a diode, and two resistance string connect ground; Two respectively parallelly connected electric capacity in resistance two ends, diode then is connected in parallel on two electric capacity two ends.
3. according to the said voltage conversion circuit of claim 1, it is characterized in that said relatively amplifying circuit comprises comparator and triode, transistor base connects comparator output terminal, and collector electrode connects variable resistance, grounded emitter.
4. according to the said voltage conversion circuit of claim 1, it is characterized in that variable resistance of regulating the sampling voltage size of tap after resistance of sample circuit serial connection comes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205229381U CN202353462U (en) | 2011-12-15 | 2011-12-15 | Voltage conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205229381U CN202353462U (en) | 2011-12-15 | 2011-12-15 | Voltage conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202353462U true CN202353462U (en) | 2012-07-25 |
Family
ID=46542424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205229381U Expired - Fee Related CN202353462U (en) | 2011-12-15 | 2011-12-15 | Voltage conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202353462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522888A (en) * | 2011-12-15 | 2012-06-27 | 濮阳三友电器有限公司 | Circuit and method for converting voltage |
-
2011
- 2011-12-15 CN CN2011205229381U patent/CN202353462U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522888A (en) * | 2011-12-15 | 2012-06-27 | 濮阳三友电器有限公司 | Circuit and method for converting voltage |
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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: 20120725 Termination date: 20141215 |
|
| EXPY | Termination of patent right or utility model |