CN203896181U - Voltage stabilizing circuit - Google Patents
Voltage stabilizing circuit Download PDFInfo
- Publication number
- CN203896181U CN203896181U CN201420226930.4U CN201420226930U CN203896181U CN 203896181 U CN203896181 U CN 203896181U CN 201420226930 U CN201420226930 U CN 201420226930U CN 203896181 U CN203896181 U CN 203896181U
- Authority
- CN
- China
- Prior art keywords
- voltage stabilizing
- voltage
- stabilizing circuit
- triode
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The utility model relates to a voltage stabilizing circuit. The voltage stabilizing circuit comprises a resistor R, a voltage stabilizing diode D and a triode Q, which are connected in series at two ends of an input voltage; a base electrode of the triode is connected with a negative electrode of the voltage stabilizing diode, a collector electrode is connected with the end of the input voltage, and an emitting electrode is connected with the end of an output voltage; and the voltage stabilizing circuit also comprises a capacitor C connected in parallel with the voltage stabilizing diode D. The voltage stabilizing circuit provided by the utility model plays a role of filtering and removing the coupling passing a power supply so as to stabilize the voltage, and is simple in structure and low in cost.
Description
Technical field
The utility model relates to electronic circuit technology field, especially a kind of voltage stabilizing circuit.
Background technology
Can be used for driving corresponding load just electric main all needs to become suitable direct current through the multistep treatment such as over commutation, filtering in use, in order to obtain more stable VD, it is necessary before direct current output, it being carried out to voltage stabilizing.The voltage stabilizing IC that has professional integrated circuit on market, can protect output short-circuit, but price is higher and will change different voltage stabilizing IC as exported different magnitudes of voltage.Adopting triode, to build voltage stabilizing circuit cost relatively low, but as while there is output short-circuit, can burn triode and outlet line, there is security risk.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of simple in structure, voltage stabilizing circuit that cost is low.
For achieving the above object, the utility model is by the following technical solutions: a kind of voltage stabilizing circuit comprises the resistance R and voltage stabilizing didoe D, the triode Q that are connected in series at input voltage two ends, described transistor base is connected with the negative pole of voltage stabilizing didoe, collector electrode is connected on input voltage one end, emitter is connected on output voltage one end, also comprises the capacitor C in parallel with voltage stabilizing didoe D.
Preferably, capacitor C is tantalum electric capacity.
Preferably, triode Q is NPN type.
By above-mentioned technical scheme, voltage stabilizing circuit of the present utility model couples together above element, and electric capacity plays filtering, eliminates by the effect of the coupling of power supply, and voltage is become to more steady.
Brief description of the drawings
Fig. 1 is the utility model circuit connection diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, electric current provides bias current through resistance R to voltage stabilizing didoe D, make voltage stabilizing didoe D reverse-conducting and terminal voltage constant in voltage stabilizing value, the base stage of triode Q also accesses this voltage stabilizing point simultaneously, so the base voltage of Q " is stablized ", because the base of triode-penetrate conducting voltage is also a steady state value (0.6-0.7V), and emitter voltage is subject to base stage control; Therefore emitter voltage is just stabilized in: voltage stabilizing didoe voltage stabilizing value deducts triode base and penetrates in the stationary value of conducting voltage (0.6-0.7V).
Capacitor C plays filtering, eliminates by the coupling of power supply, and voltage is become to steady.
The disclosed technological means of the utility model scheme is not limited only to the disclosed technological means of above-mentioned execution mode, also comprises the technical scheme being made up of above technical characterictic combination in any.
Claims (3)
1. a voltage stabilizing circuit, comprise the resistance R and voltage stabilizing didoe D, the triode Q that are connected in series at input voltage two ends, described transistor base is connected with the negative pole of voltage stabilizing didoe, collector electrode is connected on input voltage one end, emitter is connected on output voltage one end, it is characterized in that: also comprise the capacitor C in parallel with voltage stabilizing didoe D.
2. voltage stabilizing circuit as claimed in claim 1, is characterized in that: described capacitor C is tantalum electric capacity.
3. voltage stabilizing circuit as claimed in claim 1, is characterized in that: described triode Q is NPN type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226930.4U CN203896181U (en) | 2014-05-06 | 2014-05-06 | Voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226930.4U CN203896181U (en) | 2014-05-06 | 2014-05-06 | Voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203896181U true CN203896181U (en) | 2014-10-22 |
Family
ID=51722533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420226930.4U Expired - Fee Related CN203896181U (en) | 2014-05-06 | 2014-05-06 | Voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203896181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429461A (en) * | 2015-11-05 | 2016-03-23 | 北京动力源科技股份有限公司 | Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit |
-
2014
- 2014-05-06 CN CN201420226930.4U patent/CN203896181U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429461A (en) * | 2015-11-05 | 2016-03-23 | 北京动力源科技股份有限公司 | Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104244527A (en) | LED overcurrent protection circuit based on negative temperature coefficient thermistor | |
| CN206524614U (en) | A kind of current-limiting protection controls circuit | |
| CN108233169B (en) | Semiconductor laser adjustable constant current drive circuit based on three-stage voltage stabilizer | |
| CN203896181U (en) | Voltage stabilizing circuit | |
| CN104754800B (en) | A kind of control device of LED modules inrush current | |
| CN204517690U (en) | Regulator rectifier circuit | |
| CN204993098U (en) | Computer adapter power | |
| JP2013196697A (en) | Voltage stabilizing circuit and electronic device including the same | |
| CN207473455U (en) | A kind of voltage clamp circuit | |
| US20110235219A1 (en) | Protecting device | |
| CN202797873U (en) | Light-emitting diode (LED) short-circuit protection circuit | |
| CN202996717U (en) | Relay drive circuit in resistance-capacitance voltage drop-down circuit | |
| CN204517686U (en) | Voltage stabilizing full-wave rectifying circuit | |
| CN203313057U (en) | Power supply circuit | |
| CN203691701U (en) | Device for controlling input surge current of LED module | |
| CN203338345U (en) | Tablet personal computer power port having overheating overvoltage protective function | |
| CN104836316A (en) | Current-adjustable constant current charging circuit | |
| CN207410318U (en) | Improve the exciting circuit of power field effect pipe driving voltage | |
| CN204858531U (en) | Excess temperature protection circuit of high accuracy | |
| CN204681147U (en) | A kind of constant-current charging circuit of adjustable current | |
| CN204243720U (en) | A kind of output short circuit protection circuit | |
| CN204068688U (en) | A kind of power supply automatic shutdown circuitry of commercial vehicle instrument | |
| CN204289267U (en) | Relay low voltage start circuit and electronic equipment | |
| CN105305822A (en) | Voltage stabilizing circuit with short-circuit protection function | |
| CN204808094U (en) | Utilize stabilivolt generate current's electric current source |
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: 20141022 Termination date: 20200506 |