CN207473455U - A kind of voltage clamp circuit - Google Patents
A kind of voltage clamp circuit Download PDFInfo
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- CN207473455U CN207473455U CN201721385070.9U CN201721385070U CN207473455U CN 207473455 U CN207473455 U CN 207473455U CN 201721385070 U CN201721385070 U CN 201721385070U CN 207473455 U CN207473455 U CN 207473455U
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- voltage
- triode
- zener diode
- clamp circuit
- current
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- 238000000034 method Methods 0.000 abstract description 4
- 230000003750 conditioning effect Effects 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 description 8
- 239000003381 stabilizer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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Abstract
The utility model discloses a kind of voltage clamp circuit, including：Triode Q1, zener diode DZ1, current-limiting resistance R1, input voltage VB, output voltage VCC；The base stage of the triode Q1 is grounded by current-limiting resistance R1 connection input voltages VB, the emitter connection output voltage VCC of collector connection the input voltage VB, triode Q1 of the triode Q1, the base stage of the triode Q1 by zener diode DZ1.The utility model uses the method that current-limiting resistance and zener diode make clamp circuit, adding in triode does Current amplifier simultaneously, by inputting the voltage for being more than zener diode and being connected, zener diode is output voltage stabilization in setting range, reaching can burning voltage, the purpose of increase output impedance that again will not be too much provides a reliable and stable voltage signal for subsequent conditioning circuit.
Description
Technical field
The utility model is related to regulator circuit technical field more particularly to a kind of voltage clamp circuits.
Background technology
In circuit, often there is very big fluctuation, be sometimes very short arteries and veins in the power input of device or signal input
Saltus step is rushed, sometimes power supply or signal inherently change in a wide range, when pressure voltage of the input more than certain devices
When, it is possible to lead to device failure, therefore add in clamp circuit, it appears is increasingly important.
Voltage clamping, in the prior art, most common method are to increase voltage-stabiliser tube, and input signal clamper is closed at some
Suitable value.Voltage-stabiliser tube does clamper, needs series limiting resistor, if current-limiting resistance is too small, it is possible to beyond the power of voltage-stabiliser tube,
Resistance is too big, the electric current of subsequent conditioning circuit is supplied, and be possible to deficiency.
Therefore, the technical problem that those skilled in the art urgently solve is needed to be exactly at present：How innovatively
It proposes a kind of effective measures, a kind of voltage clamp circuit is designed, with meet demand.
Utility model content
To solve the above problems, the utility model discloses a kind of voltage clamp circuit, including：Triode Q1, voltage stabilizing two
Grade pipe DZ1, current-limiting resistance R1, input voltage VB, output voltage VCC；
The base stage of the triode Q1 is connected by current-limiting resistance R1 connection input voltages VB, the collector of the triode Q1
Input voltage VB, the emitter connection output voltage VCC of triode Q1 are met, the base stage of the triode Q1 passes through zener diode
DZ1 is grounded；
When the voltage value of the input voltage VB is less than the conducting voltage of the zener diode DZ1, the voltage stabilizing two
Pole pipe DZ1 ends, and the voltage of the input voltage VB is supplied to output voltage VCC to use, and output voltage VCC is input voltage VB
Voltage value subtract the base emitter drop value of triode Q1；
When the voltage value of the input voltage VB is more than the conducting voltage of the zener diode DZ1, the voltage stabilizing two
Pole pipe DZ1 is connected, and the base voltage of the triode Q1 is the conducting voltage of zener diode DZ1, and output voltage VCC is voltage stabilizing
The turn-on voltage of diode DZ1 subtracts the base emitter drop value of triode Q1.
In another embodiment of voltage clamp circuit based on the utility model, the conducting of the zener diode DZ1
Voltage value is 5.1V.
In another embodiment of voltage clamp circuit based on the utility model, the voltage value of the input voltage VB is
3V to 4.2V, voltage spikes 10V.
In another embodiment of voltage clamp circuit based on the utility model, the Base-Emitter of the triode Q1
Voltage drop value is 0.6V.
In another embodiment of voltage clamp circuit based on the utility model, the resistance value of the current-limiting resistance R1 is 47
Kilohm.
Compared with prior art, the utility model includes advantages below：
The utility model does the method for clamp circuit, while add in triode and do electricity using current-limiting resistance and zener diode
It banishes greatly, by inputting the voltage for being more than zener diode and being connected, zener diode is output voltage stabilization in setting model
In enclosing, reach can burning voltage and too many increases output impedance purpose, provide one reliably surely for subsequent conditioning circuit
Fixed voltage signal.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or the attached drawing used in description of the prior art does one and simply introduces, it should be apparent that, the accompanying drawings in the following description is this reality
With some novel embodiments, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of circuit diagram of one embodiment of voltage clamp circuit of the utility model.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiments obtained without making creative work all belong to
In the range of the utility model protection.
Fig. 1 is a kind of structure diagram of one embodiment of voltage clamp circuit of the utility model, as shown in Figure 1,
The voltage clamp circuit, including：
Triode Q1, zener diode DZ1, current-limiting resistance R1, input voltage VB, output voltage VCC；
The base stage of the triode Q1 is connected by current-limiting resistance R1 connection input voltages VB, the collector of the triode Q1
Input voltage VB, the emitter connection output voltage VCC of triode Q1 are met, the base stage of the triode Q1 passes through zener diode
DZ1 is grounded；
When the voltage value of the input voltage VB is less than the conducting voltage of the zener diode DZ1, the voltage stabilizing two
Pole pipe DZ1 ends, and the voltage of the input voltage VB is supplied to output voltage VCC to use, and output voltage VCC is input voltage VB
Voltage value subtract the base emitter drop value of triode Q1；
When the voltage value of the input voltage VB is more than the conducting voltage of the zener diode DZ1, the voltage stabilizing two
Pole pipe DZ1 is connected, and the base voltage of the triode Q1 is the conducting voltage of zener diode DZ1, and output voltage VCC is voltage stabilizing
The turn-on voltage of diode DZ1 subtracts the base emitter drop value of triode Q1.
The turn-on voltage of the zener diode DZ1 is 5.1V, and the voltage value of the input voltage VB is 3V to 4.2V,
Its voltage spikes is 10V, and the base emitter drop value of the triode Q1 is 0.6V, and the resistance value of the current-limiting resistance R1 is
47 kilohms.
Therefore, when input voltage VB is in normal range, output voltage VCC is VB-Vbe, because of zener diode
DZ1 is not turned on, and will not increase additional power consumption, and input voltage VB is acted on by the Current amplifier of triode Q1, will not be because of
The current limliting of current-limiting resistance R1 makes output impedance increase too many.
When input voltage VB is due to voltage spikes 10V, zener diode DZ1 reverse breakdowns, the base stage voltage stabilizing of triode Q1
In 5.1V, output voltage VCC subtracts Vbe, i.e. 4.5V for 5.1V at this time, protection chip will not overvoltage and be damaged, energy normal table
Work.
A kind of voltage clamp circuit provided by the utility model is described in detail above, tool used herein
Body example is expounded the principle and embodiment of the utility model, and the explanation of above example is only intended to help to understand
The method and its core concept of the utility model；Meanwhile for those of ordinary skill in the art, the think of according to the utility model
Think, in specific embodiments and applications there will be changes, in conclusion the content of the present specification should not be construed as pair
The limitation of the utility model.
Finally it should be noted that：The above descriptions are merely preferred embodiments of the present invention, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical solution recorded in foregoing embodiments or to which part technical characteristic
Equivalent replacement is carried out, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of voltage clamp circuit, which is characterized in that including：
Triode Q1, zener diode DZ1, current-limiting resistance R1, input voltage VB, output voltage VCC；
For the base stage of the triode Q1 by current-limiting resistance R1 connection input voltages VB, the collector connection of the triode Q1 is defeated
Enter voltage VB, the emitter connection output voltage VCC of triode Q1, the base stage of the triode Q1 passes through zener diode DZ1
Ground connection.
2. voltage clamp circuit according to claim 1, which is characterized in that the conducting voltage of the zener diode DZ1
It is worth for 5.1V.
3. voltage clamp circuit according to claim 2, which is characterized in that the voltage value of the input voltage VB for 3V extremely
4.2V, voltage spikes 10V.
4. the voltage clamp circuit according to Claims 2 or 3, which is characterized in that the Base-Emitter of the triode Q1
Voltage drop value is 0.6V.
5. voltage clamp circuit according to claim 1, which is characterized in that the resistance value of the current-limiting resistance R1 is 47 kilo-ohms
Nurse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721385070.9U CN207473455U (en) | 2017-10-25 | 2017-10-25 | A kind of voltage clamp circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721385070.9U CN207473455U (en) | 2017-10-25 | 2017-10-25 | A kind of voltage clamp circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207473455U true CN207473455U (en) | 2018-06-08 |
Family
ID=62264962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721385070.9U Expired - Fee Related CN207473455U (en) | 2017-10-25 | 2017-10-25 | A kind of voltage clamp circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207473455U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921400A (en) * | 2019-04-03 | 2019-06-21 | 昆山通达测科电子科技有限公司 | High-speed high-power surge voltage-suppressing circuit |
| CN111555397A (en) * | 2020-05-21 | 2020-08-18 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during lithium battery charging |
-
2017
- 2017-10-25 CN CN201721385070.9U patent/CN207473455U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921400A (en) * | 2019-04-03 | 2019-06-21 | 昆山通达测科电子科技有限公司 | High-speed high-power surge voltage-suppressing circuit |
| CN109921400B (en) * | 2019-04-03 | 2021-08-17 | 昆山通达测科电子科技有限公司 | High-speed high-power surge voltage suppression circuit |
| CN111555397A (en) * | 2020-05-21 | 2020-08-18 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during lithium battery charging |
| CN111555397B (en) * | 2020-05-21 | 2024-06-04 | 广东博力威科技股份有限公司 | Control circuit for turning off discharge output during charging of lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 523000 Tongsha New Industrial Park, Dongcheng Street, Dongguan City, Guangdong Province Patentee after: Guangdong Boliwei Technology Co.,Ltd. Address before: 523000 new industrial zone, Dongcheng District, Guangdong, Dongguan Patentee before: DONGGUAN GREENWAY BATTERY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 |