CN204244080U - A kind of power switch circuit of radio-frequency card - Google Patents
A kind of power switch circuit of radio-frequency card Download PDFInfo
- Publication number
- CN204244080U CN204244080U CN201420667605.1U CN201420667605U CN204244080U CN 204244080 U CN204244080 U CN 204244080U CN 201420667605 U CN201420667605 U CN 201420667605U CN 204244080 U CN204244080 U CN 204244080U
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- China
- Prior art keywords
- effect transistor
- field effect
- electric capacity
- diode
- resistance
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Abstract
The utility model discloses a kind of power switch circuit of radio-frequency card, comprise the first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first field effect transistor, second field effect transistor, 3rd field effect transistor, 4th field effect transistor, first resistance, second resistance, first diode, second diode, 3rd diode, 4th diode and coil, compared with prior art, the utility model induces alternating current by the electromagnetic coupled of coil at its two ends, direct voltage is produced in one end of storage capacitor after rectification, storage capacitor is charged, for radio-frequency card improves galvanic current source, and structure is simple, cost of manufacture is lower, there is the value of higher penetration and promotion.
Description
Technical field
The utility model relates to a kind of power switch circuit, particularly relates to a kind of power switch circuit of radio-frequency card.
Background technology
In recent years, along with wireless communication technology, the development of microelectric technique, Technology of Radio Frequency Card is flourish, and in various fields, obtain universal and popularization rapidly, when radio-frequency card enters reader magnetic field, from magnetic field, obtain energy by electromagnetic induction, the power switch circuit job stability of radio-frequency card is now poor, reduces the operating efficiency of radio-frequency card.
Utility model content
The purpose of this utility model is just the power switch circuit providing a kind of radio-frequency card in order to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises the first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first field effect transistor, second field effect transistor, 3rd field effect transistor, 4th field effect transistor, first resistance, second resistance, first diode, second diode, 3rd diode, 4th diode and coil, the first end of described second resistance is connected with the first end of described 4th electric capacity and as the supply voltage output of described power switch circuit, second end ground connection of described 4th electric capacity, second end of described second resistance is connected with the negative pole of described 4th diode and the negative pole of described 3rd diode simultaneously, the positive pole of described 4th diode simultaneously with the negative pole of described first diode, the source electrode of described first field effect transistor, the grid of described second field effect transistor is connected with the first end of described first electric capacity, the drain electrode of described second field effect transistor is connected with the drain electrode of described first field effect transistor and ground connection, the positive pole of described 3rd diode simultaneously with the negative pole of described second diode, the source electrode of described second field effect transistor, the grid of described first field effect transistor is connected with the first end of described second electric capacity, the positive pole of described first diode simultaneously with the positive pole of described second diode, the first end of described first resistance is connected with the first end of described 3rd electric capacity, second end of described 3rd electric capacity is connected with the source electrode of described 3rd field effect transistor and ground connection, the drain electrode of described 3rd field effect transistor is connected with the second end of described first resistance and the drain electrode of described 4th field effect transistor simultaneously, the source electrode of described 4th field effect transistor is connected with the grid of described 3rd field effect transistor and as the first control signal input of described power switch circuit, the grid of described 4th field effect transistor is the second control signal input of described power switch circuit, second end of described first electric capacity is connected with the first end of described coil, second end of described coil is connected with the second end of the electric capacity of described second.
The beneficial effects of the utility model are:
The power switch circuit of a kind of radio-frequency card described in the utility model, alternating current is induced at its two ends by the electromagnetic coupled of coil, direct voltage is produced in one end of storage capacitor after rectification, storage capacitor is charged, for radio-frequency card improves galvanic current source, and structure is simple, cost of manufacture is lower, has the value of higher penetration and promotion.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model comprises the first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, first field effect transistor VT1, second field effect transistor VT2, 3rd field effect transistor VT3, 4th field effect transistor VT4, first resistance R1, second resistance R2, first diode D1, second diode D2, 3rd diode D3, 4th diode D4 and coil L, the first end of the second resistance R2 is connected with the first end of the 4th electric capacity C4 and as the supply voltage output of power switch circuit, the second end ground connection of the 4th electric capacity C4, second end of the second resistance R2 is connected with the negative pole of the 4th diode D4 and the negative pole of the 3rd diode D3 simultaneously, the positive pole of the 4th diode D4 simultaneously with the negative pole of the first diode D1, the source electrode of the first field effect transistor VT1, the grid of the second field effect transistor VT2 is connected with the first end of the first electric capacity C1, the drain electrode of the second field effect transistor VT2 is connected with the drain electrode of the first field effect transistor VT1 and ground connection, the positive pole of the 3rd diode D3 simultaneously with the negative pole of the second diode D2, the source electrode of the second field effect transistor VT2, the grid of the first field effect transistor VT1 is connected with the first end of the second electric capacity C2, the positive pole of the first diode D1 simultaneously with the positive pole of the second diode D2, the first end of the first resistance R1 is connected with the first end of the 3rd electric capacity C3, second end of the 3rd electric capacity C3 is connected with the source electrode of the 3rd field effect transistor VT3 and ground connection, the drain electrode of the 3rd field effect transistor VT3 is connected with second end of the first resistance R1 and the drain electrode of the 4th field effect transistor VT4 simultaneously, the source electrode of the 4th field effect transistor VT4 is connected with the grid of the 3rd field effect transistor VT3 and as the first control signal input of power switch circuit, the grid of the 4th field effect transistor VT4 is the second control signal input of power switch circuit, second end of the first electric capacity C1 is connected with the first end of coil L, second end of coil L is connected with second end of the second electric capacity C2.
The power switch circuit of a kind of radio-frequency card described in the utility model, alternating current is induced at its two ends by the electromagnetic coupled of coil L, direct voltage is produced in one end of storage capacitor (the 4th electric capacity C4) after rectification, pressure regulation electric capacity (the 3rd electric capacity C3) forms discharge loop after the second field effect transistor VT2 conducting, the electric current on coil L two ends is made to start charge to the 3rd electric capacity C3 and stop charging to the 4th electric capacity C4, the 4th electric capacity C4 both end voltage is made to keep stable, be the supply voltage that load circuit provides stable, the utility model structure is simple, cost of manufacture is lower, there is the value of higher penetration and promotion.
Claims (1)
1. the power switch circuit of a radio-frequency card, it is characterized in that: comprise the first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first field effect transistor, second field effect transistor, 3rd field effect transistor, 4th field effect transistor, first resistance, second resistance, first diode, second diode, 3rd diode, 4th diode and coil, the first end of described second resistance is connected with the first end of described 4th electric capacity and as the supply voltage output of described power switch circuit, second end ground connection of described 4th electric capacity, second end of described second resistance is connected with the negative pole of described 4th diode and the negative pole of described 3rd diode simultaneously, the positive pole of described 4th diode simultaneously with the negative pole of described first diode, the source electrode of described first field effect transistor, the grid of described second field effect transistor is connected with the first end of described first electric capacity, the drain electrode of described second field effect transistor is connected with the drain electrode of described first field effect transistor and ground connection, the positive pole of described 3rd diode simultaneously with the negative pole of described second diode, the source electrode of described second field effect transistor, the grid of described first field effect transistor is connected with the first end of described second electric capacity, the positive pole of described first diode simultaneously with the positive pole of described second diode, the first end of described first resistance is connected with the first end of described 3rd electric capacity, second end of described 3rd electric capacity is connected with the source electrode of described 3rd field effect transistor and ground connection, the drain electrode of described 3rd field effect transistor is connected with the second end of described first resistance and the drain electrode of described 4th field effect transistor simultaneously, the source electrode of described 4th field effect transistor is connected with the grid of described 3rd field effect transistor and as the first control signal input of described power switch circuit, the grid of described 4th field effect transistor is the second control signal input of described power switch circuit, second end of described first electric capacity is connected with the first end of described coil, second end of described coil is connected with the second end of described second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667605.1U CN204244080U (en) | 2014-11-10 | 2014-11-10 | A kind of power switch circuit of radio-frequency card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667605.1U CN204244080U (en) | 2014-11-10 | 2014-11-10 | A kind of power switch circuit of radio-frequency card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244080U true CN204244080U (en) | 2015-04-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420667605.1U Expired - Fee Related CN204244080U (en) | 2014-11-10 | 2014-11-10 | A kind of power switch circuit of radio-frequency card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204244080U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200856A (en) * | 2016-08-30 | 2016-12-07 | 深圳市富满电子集团股份有限公司 | A kind of portable set and power management chip thereof |
-
2014
- 2014-11-10 CN CN201420667605.1U patent/CN204244080U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200856A (en) * | 2016-08-30 | 2016-12-07 | 深圳市富满电子集团股份有限公司 | A kind of portable set and power management chip thereof |
| CN106200856B (en) * | 2016-08-30 | 2023-01-20 | 富满微电子集团股份有限公司 | Portable equipment and power management chip thereof |
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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: 20150401 Termination date: 20151110 |
|
| EXPY | Termination of patent right or utility model |