CN204808096U - Self -starting electric current source - Google Patents
Self -starting electric current source Download PDFInfo
- Publication number
- CN204808096U CN204808096U CN201520489427.2U CN201520489427U CN204808096U CN 204808096 U CN204808096 U CN 204808096U CN 201520489427 U CN201520489427 U CN 201520489427U CN 204808096 U CN204808096 U CN 204808096U
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- Prior art keywords
- pipe
- collector
- base stage
- npn
- pnp
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Abstract
The utility model discloses a self -starting electric current source. Self -starting electric current source includes first resistance, second resistance, a PNP pipe, a NPN pipe, the 2nd NPN pipe, the 2nd PNP pipe, the 3rd PNP pipe, the 3rd NPN pipe, fourth NPN pipe, third resistance and fourth PNP pipe.
Description
Technical field
The utility model relates to current source, refers more particularly to self-starting current source.
Background technology
Devise a kind of self-starting current source.
Summary of the invention
The utility model aims to provide a kind of self-starting current source.
A kind of self-starting current source, comprises the first resistance, the second resistance, the first PNP pipe, a NPN pipe, the 2nd NPN pipe, the second PNP pipe, the 3rd PNP pipe, the 3rd NPN pipe, the 4th NPN pipe, the 3rd resistance and the 4th PNP pipe:
One termination supply voltage VCC of described first resistance, the collector of one end of the second resistance described in another termination and the base stage of a described NPN pipe and described 2nd NPN pipe;
The collector of one end of the first resistance described in one termination of described second resistance and the base stage of a described NPN pipe and described 2nd NPN pipe, other end ground connection;
The base stage of described first PNP pipe connects the collector of a described NPN pipe, and collector connects the base stage of the collector of described second PNP pipe and the base stage of described 3rd NPN pipe and collector and described 4th NPN pipe, and emitter meets supply voltage VCC;
The base stage of a described NPN pipe connects the collector of one end of described first resistance and one end of described second resistance and described 2nd NPN pipe, and collector connects the base stage of described first PNP pipe, grounded emitter;
The base stage of described 2nd NPN pipe connects the base stage of the collector of described first PNP pipe and the collector of described second PNP pipe and described 3rd NPN pipe and the base stage of collector and described 4th NPN pipe, collector connects the base stage of one end of described first resistance and one end of described second resistance and a described NPN pipe, grounded emitter;
The base stage of described second PNP pipe connects the collector of the base stage of described 3rd PNP pipe and the base stage of collector and described 4th PNP pipe and described 4th NPN pipe, collector connects the base stage of the collector of described first PNP pipe and the base stage of described 3rd NPN pipe and collector and described 4th NPN pipe, and emitter meets supply voltage VCC;
The base stage of described 3rd PNP pipe and collector are connected together the base stage and the base stage of described 4th PNP pipe and the collector of described 4th NPN pipe that connect described 3rd PNP pipe again, and emitter meets supply voltage VCC;
The base stage of described 3rd NPN pipe and collector are connected together the base stage of the collector that connects described first PNP pipe again and the collector of described second PNP pipe and the base stage of described 2nd NPN pipe and described 4th NPN pipe, grounded emitter;
The base stage of described 4th NPN pipe connects the base stage of the collector of described first PNP pipe and the collector of described second PNP pipe and described 2nd NPN pipe and the base stage of described 3rd NPN pipe and collector, collector connects the base stage of the base stage of described second PNP pipe and the base stage of described 3rd PNP pipe and collector and described 4th PNP pipe, and emitter connects one end of the 3rd resistance;
The emitter of the 4th NPN pipe described in one termination of described 3rd resistance, other end ground connection;
The base stage of described 4th PNP pipe connects the collector of the base stage of described second PNP pipe and the base stage of described 3rd PNP pipe and collector and described 4th NPN pipe, and collector is as current output terminal IOUT, and emitter meets supply voltage VCC.
Determine the base voltage of a described NPN pipe by described first resistance and described second electric resistance partial pressure and make a described NPN pipe conducting, the collector that base stage due to described first PNP pipe is connected to a described NPN pipe can make the base stage of described first PNP pipe have electric current and make the collector of described first PNP pipe have electric current to flow to described 3rd NPN to manage mirror image to described 2nd NPN pipe and described 4th NPN again and manage, after described 2nd NPN pipe conducting, collector voltage will be dragged down and cause a described NPN pipe to be closed, described like this first PNP pipe would not have outflow of bus current, starting current is closed, the BE junction voltage of described 3rd NPN pipe is added in generation current on described 3rd resistance and flows out electric current I OUT by described 3rd PNP pipe mirror image to described 4th PNP pipe.
Accompanying drawing explanation
Fig. 1 is the circuit diagram in a kind of self-starting current source of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is further illustrated.
A kind of self-starting current source, as shown in Figure 1, the first resistance 101, second resistance 102, first PNP pipe 103, a NPN pipe 104, the 2nd NPN pipe 105, second PNP pipe 106, the 3rd PNP pipe 107, the 3rd NPN pipe 108, the 4th NPN pipe 109, the 3rd resistance 110 and the 4th PNP pipe 111 is comprised:
One termination supply voltage VCC of described first resistance 101, the collector of one end of the second resistance 102 described in another termination and the base stage of a described NPN pipe 104 and described 2nd NPN pipe 105;
The collector of one end of the first resistance 101 described in one termination of described second resistance 102 and the base stage of a described NPN pipe 104 and described 2nd NPN pipe 105, other end ground connection;
The base stage of described first PNP pipe 103 connects the collector of a described NPN pipe 104, and collector connects the base stage of the collector of described second PNP pipe 106 and the base stage of described 3rd NPN pipe 108 and collector and described 4th NPN pipe 109, and emitter meets supply voltage VCC;
The base stage of a described NPN pipe 104 connects the collector of one end of described first resistance 101 and one end of described second resistance 102 and described 2nd NPN pipe 105, and collector connects the base stage of described first PNP pipe 103, grounded emitter;
The base stage of described 2nd NPN pipe 105 connects the base stage of the collector of described first PNP pipe 103 and the collector of described second PNP pipe 106 and described 3rd NPN pipe 108 and the base stage of collector and described 4th NPN pipe 109, collector connects the base stage of one end of described first resistance 101 and one end of described second resistance 102 and a described NPN pipe 104, grounded emitter;
The base stage of described second PNP pipe 106 connects the collector of the base stage of described 3rd PNP pipe 107 and the base stage of collector and described 4th PNP pipe 111 and described 4th NPN pipe 109, collector connects the base stage of the collector of described first PNP pipe 103 and the base stage of described 3rd NPN pipe 108 and collector and described 4th NPN pipe 109, and emitter meets supply voltage VCC;
The base stage of described 3rd PNP pipe 107 and collector are connected together the base stage and the base stage of described 4th PNP pipe 111 and the collector of described 4th NPN pipe 109 that connect described 3rd PNP pipe 106 again, and emitter meets supply voltage VCC;
The base stage of described 3rd NPN pipe 108 and collector are connected together the base stage of the collector that connects described first PNP pipe 103 again and the collector of described second PNP pipe 106 and the base stage of described 2nd NPN pipe 105 and described 4th NPN pipe 109, grounded emitter;
The base stage of described 4th NPN pipe 109 connects the base stage of the collector of described first PNP pipe 103 and the collector of described second PNP pipe 106 and described 2nd NPN pipe 105 and the base stage of described 3rd NPN pipe 108 and collector, collector connects the base stage of the base stage of described second PNP pipe 106 and the base stage of described 3rd PNP pipe 107 and collector and described 4th PNP pipe 111, and emitter connects one end of the 3rd resistance 110;
The emitter of the 4th NPN pipe 109 described in one termination of described 3rd resistance 110, other end ground connection;
The base stage of described 4th PNP pipe 111 connects the collector of the base stage of described second PNP pipe 106 and the base stage of described 3rd PNP pipe 107 and collector and described 4th NPN pipe 109, and collector is as current output terminal IOUT, and emitter meets supply voltage VCC.
Determine the base voltage of a described NPN pipe 104 by described first resistance 101 and described second resistance 102 dividing potential drop and make described NPN pipe 104 conducting, the collector that base stage due to described first PNP pipe 103 is connected to a described NPN pipe 104 base stage of described first PNP pipe 103 can be made to have electric current and make the collector of described first PNP pipe 103 have electric current flow to described 3rd NPN pipe 108 again mirror image to described 2nd NPN pipe 105 and described 4th NPN pipe 109, after described 2nd NPN pipe 105 conducting, collector voltage will be dragged down and cause a described NPN pipe 104 to be closed, described like this first PNP pipe 103 would not have outflow of bus current, starting current is closed, the BE junction voltage of described 3rd NPN pipe 108 is added in generation current on described 3rd resistance 110 and flows out electric current I OUT by described 3rd PNP pipe 107 mirror image to described 4th PNP pipe 111.
Claims (1)
1. a self-starting current source, is characterized in that: comprise the first resistance, the second resistance, the first PNP pipe, a NPN pipe, the 2nd NPN pipe, the second PNP pipe, the 3rd PNP pipe, the 3rd NPN pipe, the 4th NPN pipe, the 3rd resistance and the 4th PNP pipe;
One termination supply voltage VCC of described first resistance, the collector of one end of the second resistance described in another termination and the base stage of a described NPN pipe and described 2nd NPN pipe;
The collector of one end of the first resistance described in one termination of described second resistance and the base stage of a described NPN pipe and described 2nd NPN pipe, other end ground connection;
The base stage of described first PNP pipe connects the collector of a described NPN pipe, and collector connects the base stage of the collector of described second PNP pipe and the base stage of described 3rd NPN pipe and collector and described 4th NPN pipe, and emitter meets supply voltage VCC;
The base stage of a described NPN pipe connects the collector of one end of described first resistance and one end of described second resistance and described 2nd NPN pipe, and collector connects the base stage of described first PNP pipe, grounded emitter;
The base stage of described 2nd NPN pipe connects the base stage of the collector of described first PNP pipe and the collector of described second PNP pipe and described 3rd NPN pipe and the base stage of collector and described 4th NPN pipe, collector connects the base stage of one end of described first resistance and one end of described second resistance and a described NPN pipe, grounded emitter;
The base stage of described second PNP pipe connects the collector of the base stage of described 3rd PNP pipe and the base stage of collector and described 4th PNP pipe and described 4th NPN pipe, collector connects the base stage of the collector of described first PNP pipe and the base stage of described 3rd NPN pipe and collector and described 4th NPN pipe, and emitter meets supply voltage VCC;
The base stage of described 3rd PNP pipe and collector are connected together the base stage and the base stage of described 4th PNP pipe and the collector of described 4th NPN pipe that connect described 3rd PNP pipe again, and emitter meets supply voltage VCC;
The base stage of described 3rd NPN pipe and collector are connected together the base stage of the collector that connects described first PNP pipe again and the collector of described second PNP pipe and the base stage of described 2nd NPN pipe and described 4th NPN pipe, grounded emitter;
The base stage of described 4th NPN pipe connects the base stage of the collector of described first PNP pipe and the collector of described second PNP pipe and described 2nd NPN pipe and the base stage of described 3rd NPN pipe and collector, collector connects the base stage of the base stage of described second PNP pipe and the base stage of described 3rd PNP pipe and collector and described 4th PNP pipe, and emitter connects one end of the 3rd resistance;
The emitter of the 4th NPN pipe described in one termination of described 3rd resistance, other end ground connection;
The base stage of described 4th PNP pipe connects the collector of the base stage of described second PNP pipe and the base stage of described 3rd PNP pipe and collector and described 4th NPN pipe, and collector is as current output terminal IOUT, and emitter meets supply voltage VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520489427.2U CN204808096U (en) | 2015-07-03 | 2015-07-03 | Self -starting electric current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520489427.2U CN204808096U (en) | 2015-07-03 | 2015-07-03 | Self -starting electric current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204808096U true CN204808096U (en) | 2015-11-25 |
Family
ID=54592885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520489427.2U Expired - Fee Related CN204808096U (en) | 2015-07-03 | 2015-07-03 | Self -starting electric current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204808096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115617116A (en) * | 2022-12-19 | 2023-01-17 | 深圳市思远半导体有限公司 | Current source circuit, system, chip and electronic equipment |
-
2015
- 2015-07-03 CN CN201520489427.2U patent/CN204808096U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115617116A (en) * | 2022-12-19 | 2023-01-17 | 深圳市思远半导体有限公司 | Current source circuit, system, chip and electronic equipment |
| CN115617116B (en) * | 2022-12-19 | 2023-03-10 | 深圳市思远半导体有限公司 | Current source circuit, system, chip and electronic equipment |
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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: 20151125 Termination date: 20160703 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |