CN203661017U - Comparator realization circuit - Google Patents
Comparator realization circuit Download PDFInfo
- Publication number
- CN203661017U CN203661017U CN201420000980.0U CN201420000980U CN203661017U CN 203661017 U CN203661017 U CN 203661017U CN 201420000980 U CN201420000980 U CN 201420000980U CN 203661017 U CN203661017 U CN 203661017U
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- China
- Prior art keywords
- reference voltage
- divider resistance
- resistance
- comparator
- current
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- Expired - Fee Related
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Abstract
The utility model discloses a comparator realization circuit. The comparator realization circuit is characterized in that no external constant current source is required, and the functions can be realized only by employing three resistors and one adjustable shunting reference voltage source chip. The comparator realization circuit has advantages of simple structure, low cost and stable and reliable performance.
Description
Technical field
The utility model has related to a kind of circuit of realizing of comparator, is particularly related to basic electronic circuit field.
Background technology
Tradition comparator needs external constant-current source could realize its function, and circuit structure is comparatively complicated, and this just needs a kind of simple and practical comparator circuit.
Summary of the invention
The utility model provides a kind of circuit of realizing of comparator, and its feature is not need external constant-current source, only needs three resistance and an adjustable shunt reference voltage source chip just can realize its function.The advantages such as this circuit possesses simple in structure, with low cost, reliable and stable.
This circuit comprises adjustable shunt reference voltage source chip U1, divider resistance R1 and R2, current-limiting resistance R3, wherein: the reference voltage end REF of adjustable shunt reference voltage source chip U1 connects the common port of divider resistance R1 and R2, plus earth, negative electrode is connected to one end and the output end vo ut of current-limiting resistance R3; The input Vin of another termination power of divider resistance R1; Divider resistance R2 other end ground connection; Described current-limiting resistance R3 other end welding system power supply VCC.
Brief description of the drawings
Accompanying drawing 1 is comparator circuit structure chart.
Embodiment
Circuit as shown in the figure, can arrange reference voltage by the value of configuration divider resistance R1 and R2.In the time that input voltage vin is lower, the voltage of divider resistance R1 and R2 common port is less than adjustable shunt reference voltage source chip U1 internal reference voltage, between the negative electrode of adjustable shunt reference voltage source chip U1 and anode, be now high-impedance state, so be output as VCC, when input voltage reaches certain numerical value, the voltage of divider resistance R1 and R2 common port is greater than or equal to adjustable shunt reference voltage source chip U1 internal reference voltage, now conducting between the negative electrode of adjustable shunt reference voltage source chip U1 and anode, is output as 0V.Owing to requiring adjustable shunt reference voltage source chip On current to be greater than 1mA, thus require the resistance R 3 can not be excessive, and also divider resistance R1 and R2 use the precision resistance of 1% precision.
In sum, the structure of a kind of the comparator circuit above embodiment of the present invention being provided is described in detail, applied part specific case herein principle of the present invention and implementation method are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept; For one of ordinary skill in the art, according to thought of the present invention, all have in specific embodiments and applications certain change, this description should not be construed as limitation of the present invention simultaneously.
Claims (1)
- A comparator realize circuit, comprise adjustable shunt reference voltage source chip U1, divider resistance R1 and R2, current-limiting resistance R3, it is characterized in that: the reference voltage end REF of described adjustable shunt reference voltage source chip U1 connects the common port of divider resistance R1 and R2, plus earth, negative electrode is connected to one end and the output end vo ut of current-limiting resistance R3; The input Vin of described another termination power of divider resistance R1; Described divider resistance R2 other end ground connection; Described current-limiting resistance R3 other end welding system power supply VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420000980.0U CN203661017U (en) | 2014-01-02 | 2014-01-02 | Comparator realization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420000980.0U CN203661017U (en) | 2014-01-02 | 2014-01-02 | Comparator realization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203661017U true CN203661017U (en) | 2014-06-18 |
Family
ID=50927365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420000980.0U Expired - Fee Related CN203661017U (en) | 2014-01-02 | 2014-01-02 | Comparator realization circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203661017U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356741A (en) * | 2015-12-07 | 2016-02-24 | 合肥巨一动力系统有限公司 | Enabling signal control circuit of electric automobile DCDC Converter |
-
2014
- 2014-01-02 CN CN201420000980.0U patent/CN203661017U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356741A (en) * | 2015-12-07 | 2016-02-24 | 合肥巨一动力系统有限公司 | Enabling signal control circuit of electric automobile DCDC Converter |
| CN105356741B (en) * | 2015-12-07 | 2019-02-05 | 一巨自动化装备（上海）有限公司 | A kind of enable signal control circuit of electric car DCDC Converter |
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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: 20140618 Termination date: 20180102 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |