CN204808089U - Can judge electric current source of voltage height - Google Patents
Can judge electric current source of voltage height Download PDFInfo
- Publication number
- CN204808089U CN204808089U CN201520489443.1U CN201520489443U CN204808089U CN 204808089 U CN204808089 U CN 204808089U CN 201520489443 U CN201520489443 U CN 201520489443U CN 204808089 U CN204808089 U CN 204808089U
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- pipe
- collector
- base stage
- connects
- pnp
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Abstract
The utility model discloses a can judge electric current source of voltage height. Can judge electric current source of voltage height includes an operational amplifier, a PNP pipe, a NPN pipe, first resistance, the 2nd PNP pipe, the 2nd NNP pipe, the 3rd NPN pipe, the 2nd operational amplifier, the 3rd PNP pipe, fourth NPN pipe, second resistance, fourth PNP pipe, a LED lamp and the 2nd LED lamp.
Description
Technical field
The utility model relates to current source, refers more particularly to the current source that can judge voltage levels.
Background technology
Devise the current source that can judge voltage levels.
Summary of the invention
The utility model aims to provide a kind of current source that can judge voltage levels.
The current source of voltage levels can be judged, comprise the first operational amplifier, the first PNP pipe, a NPN pipe, the first resistance, the second PNP pipe, the 2nd NNP pipe, the 3rd NPN pipe, the second operational amplifier, the 3rd PNP pipe, the 4th NPN pipe, the second resistance, the 4th PNP pipe, the first LED and the second LED:
The positive input termination voltage V1 of described first operational amplifier, the emitter of a NPN pipe described in negative input termination and one end of described first resistance, export the base stage of a NPN pipe described in termination;
The base stage of described first PNP pipe and collector are connected together and connect the collector of a described NPN pipe and the base stage of described second PNP pipe again, and emitter meets supply voltage VCC;
The base stage of a described NPN pipe connects the output terminal of described first operational amplifier, collector connects the base stage of described first PNP pipe and the base stage of collector and described second PNP pipe, and emitter connects the negative input end of described first operational amplifier and one end of described first resistance;
The negative input end of the first operational amplifier described in one termination of described first resistance and the emitter of a described NPN pipe, other end ground connection;
The base stage of described second PNP pipe connects the base stage of described first PNP pipe and the collector of collector and a described NPN pipe, and collector connects the base stage of described 2nd NPN pipe and the base stage of collector and described 3rd NPN pipe, and emitter meets supply voltage VCC;
The base stage of described 2nd NNP pipe and collector are connected together the base stage of the collector that connects described second PNP pipe again and described 3rd NPN pipe, grounded emitter;
The base stage of described 3rd NPN pipe connects the collector of described second PNP pipe and the base stage of described 2nd NPN pipe and collector, and collector connects the P pole of the collector of described 4th PNP pipe and the N pole of described first LED and described second LED, grounded emitter;
The positive input termination voltage V2 of described second operational amplifier, the emitter of the 4th NPN pipe described in negative input termination and one end of described second resistance, export the base stage of the 4th NPN pipe described in termination;
The base stage of described 3rd PNP pipe and collector are connected together the base stage of the collector that connects described 4th NPN pipe again and described 4th PNP pipe, and emitter meets supply voltage VCC;
The base stage of described 4th NPN pipe connects the output terminal of described second operational amplifier, collector connects the base stage of described 3rd PNP pipe and the base stage of collector and described 4th PNP pipe, and emitter connects the negative input end of described second operational amplifier and one end of described second resistance;
The negative input end of the second operational amplifier described in one termination of described second resistance and the emitter of described 4th NPN pipe, other end ground connection;
The base stage of described 4th PNP pipe connects the base stage of described 3rd PNP pipe and the collector of collector and described 4th NPN pipe, collector connects the P pole of the collector of described 3rd NPN pipe and the N pole of described first LED and described second LED, and emitter meets supply voltage VCC;
The P pole of described first LED meets supply voltage VCC, and N pole connects the collector of described 3rd NPN pipe and the collector of described 4th PNP pipe and the P pole of described second LED;
The P pole of described second LED connects the collector of described 3rd NPN pipe and the collector of described 4th PNP pipe and the N pole of described first LED, N pole ground connection.
The resistance value of described first operational amplifier and the parameter of described second operational amplifier, described first resistance and described second resistance and type, a described NPN pipe and described 4th NPN pipe, described first PNP pipe and described 3rd PNP pipe, described second PNP pipe and described 4th PNP pipe, described 2nd NPN pipe are all the same with described 3rd NPN pipe pipe type with parameter; Described first operational amplifier and a described NPN pipe form follower, and described first ohmically voltage equals voltage V1, and described first ohmically electric current equals voltage V1 divided by described first resistance value, and this electric current is exactly I11; I13 is obtained again by twice mirror image; Described second operational amplifier and described 4th NPN pipe form follower, and described second ohmically voltage equals voltage V2, and described second ohmically electric current equals voltage V2 divided by described second resistance value, and this electric current is exactly I21; I22 is obtained again by a mirror image; If V1 equals V2, electric current I 22 is equal with electric current I 13, and just do not have electric current to flow through described first LED and described second LED, described first LED and described second LED would not be bright; When voltage V1 is greater than V2, electric current I 13 is just greater than electric current I 22, and so just have unnecessary electric current to flow through described first LED 301, described first LED will be bright, and described second LED does not work; When voltage V1 is less than V2, electric current I 13 is just less than electric current I 22, and so just have unnecessary electric current to flow through described second LED, described second LED will be bright, and described first LED does not work; Bright or do not work and judge the voltage levels of voltage V1 and V2 by LED.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that can judge the current source of voltage levels of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is further illustrated.
The current source of voltage levels can be judged, as shown in Figure 1, the first operational amplifier 101, first PNP pipe 102, NPN pipe 103, first resistance 104, second PNP pipe 105, the 2nd NNP pipe 106, the 3rd NPN pipe 107, second operational amplifier 201, the 3rd PNP pipe 202, the 4th NPN pipe 203, second resistance 204, the 4th PNP pipe 205, first LED 301 and the second LED 302 is comprised:
The positive input termination voltage V1 of described first operational amplifier 101, the emitter of a NPN pipe 103 described in negative input termination and one end of described first resistance 104, export the base stage of a NPN pipe 103 described in termination;
The base stage of described first PNP pipe 102 and collector are connected together the base stage of the collector that connects a described NPN pipe 103 again and described second PNP pipe 105, and emitter meets supply voltage VCC;
The base stage of a described NPN pipe 103 connects the output terminal of described first operational amplifier 101, collector connects the base stage of described first PNP pipe 102 and the base stage of collector and described second PNP pipe 105, and emitter connects the negative input end of described first operational amplifier 101 and one end of described first resistance 104;
The negative input end of the first operational amplifier 101 described in one termination of described first resistance 104 and the emitter of a described NPN pipe 103, other end ground connection;
The base stage of described second PNP pipe 105 connects the base stage of described first PNP pipe 102 and the collector of collector and a described NPN pipe 103, collector connects the base stage of described 2nd NPN pipe 106 and the base stage of collector and described 3rd NPN pipe 107, and emitter meets supply voltage VCC;
The base stage of described 2nd NNP pipe 106 and collector are connected together the base stage of the collector that connects described second PNP pipe 105 again and described 3rd NPN pipe 107, grounded emitter;
The base stage of described 3rd NPN pipe 107 connects the collector of described second PNP pipe 105 and the base stage of described 2nd NPN pipe 106 and collector, collector connects the P pole of the collector of described 4th PNP pipe 205 and the N pole of described first LED 301 and described second LED 302, grounded emitter;
The positive input termination voltage V2 of described second operational amplifier 201, the emitter of the 4th NPN pipe 203 described in negative input termination and one end of described second resistance 204, export the base stage of the 4th NPN pipe 203 described in termination;
The base stage of described 3rd PNP pipe 202 and collector are connected together the base stage of the collector that connects described 4th NPN pipe 203 again and described 4th PNP pipe 205, and emitter meets supply voltage VCC;
The base stage of described 4th NPN pipe 203 connects the output terminal of described second operational amplifier 201, collector connects the base stage of described 3rd PNP pipe 202 and the base stage of collector and described 4th PNP pipe 205, and emitter connects the negative input end of described second operational amplifier 201 and one end of described second resistance 204;
The negative input end of the second operational amplifier 201 described in one termination of described second resistance 204 and the emitter of described 4th NPN pipe 203, other end ground connection;
The base stage of described 4th PNP pipe 205 connects the base stage of described 3rd PNP pipe 202 and the collector of collector and described 4th NPN pipe 203, collector connects the P pole of the collector of described 3rd NPN pipe 107 and the N pole of described first LED 301 and described second LED 302, and emitter meets supply voltage VCC;
The P pole of described first LED 301 meets supply voltage VCC, and N pole connects the P pole of the collector of described 3rd NPN pipe 107 and the collector of described 4th PNP pipe 205 and described second LED 302;
The P pole of described second LED 302 connects the N pole of the collector of described 3rd NPN pipe 107 and the collector of described 4th PNP pipe 205 and described first LED 301, N pole ground connection.
The resistance value of described first operational amplifier 101 and the parameter of described second operational amplifier 201, described first resistance 104 and described second resistance 204 is all the same with type, a described NPN pipe 103 and described 4th NPN pipe 203, described first PNP pipe 102 and described 3rd PNP pipe 202, described second PNP pipe 105 and described 4th PNP pipe 205, described 2nd NPN pipe 106 and described 3rd NPN pipe 107 pipe type with parameter; Described first operational amplifier 101 and a described NPN pipe 103 form follower, and the voltage on described first resistance 104 equals voltage V1, and the electric current on described first resistance 104 equals voltage V1 divided by described first resistance 104 resistance value, and this electric current is exactly I11; I13 is obtained again by twice mirror image; Described second operational amplifier 201 and described 4th NPN pipe 203 form follower, and the voltage on described second resistance 204 equals voltage V2, and the electric current on described second resistance 204 equals voltage V2 divided by described second resistance 204 resistance value, and this electric current is exactly I21; I22 is obtained again by a mirror image; If V1 equals V2, electric current V22 is equal with electric current V13, and just do not have electric current to flow through described first LED 301 and described second LED 302, described first LED 301 and described second LED 302 would not be bright; When voltage V1 is greater than V2, electric current I 13 is just greater than electric current I 22, and so just have unnecessary electric current to flow through described first LED 301, described first LED 301 will be bright, and described second LED 302 does not work; When voltage V1 is less than V2, electric current I 13 is just less than electric current I 22, and so just have unnecessary electric current to flow through described second LED 302, described second LED 302 will be bright, and described first LED 301 does not work; Bright or do not work and judge the voltage levels of voltage V1 and V2 by LED.
Claims (1)
1. can judge the current source of voltage levels, it is characterized in that: comprise the first operational amplifier, the first PNP pipe, a NPN pipe, the first resistance, the second PNP pipe, the 2nd NNP pipe, the 3rd NPN pipe, the second operational amplifier, the 3rd PNP pipe, the 4th NPN pipe, the second resistance, the 4th PNP pipe, the first LED and the second LED;
The positive input termination voltage V1 of described first operational amplifier, the emitter of a NPN pipe described in negative input termination and one end of described first resistance, export the base stage of a NPN pipe described in termination;
The base stage of described first PNP pipe and collector are connected together and connect the collector of a described NPN pipe and the base stage of described second PNP pipe again, and emitter meets supply voltage VCC;
The base stage of a described NPN pipe connects the output terminal of described first operational amplifier, collector connects the base stage of described first PNP pipe and the base stage of collector and described second PNP pipe, and emitter connects the negative input end of described first operational amplifier and one end of described first resistance;
The negative input end of the first operational amplifier described in one termination of described first resistance and the emitter of a described NPN pipe, other end ground connection;
The base stage of described second PNP pipe connects the base stage of described first PNP pipe and the collector of collector and a described NPN pipe, and collector connects the base stage of described 2nd NPN pipe and the base stage of collector and described 3rd NPN pipe, and emitter meets supply voltage VCC;
The base stage of described 2nd NNP pipe and collector are connected together the base stage of the collector that connects described second PNP pipe again and described 3rd NPN pipe, grounded emitter;
The base stage of described 3rd NPN pipe connects the collector of described second PNP pipe and the base stage of described 2nd NPN pipe and collector, and collector connects the P pole of the collector of described 4th PNP pipe and the N pole of described first LED and described second LED, grounded emitter;
The positive input termination voltage V2 of described second operational amplifier, the emitter of the 4th NPN pipe described in negative input termination and one end of described second resistance, export the base stage of the 4th NPN pipe described in termination;
The base stage of described 3rd PNP pipe and collector are connected together the base stage of the collector that connects described 4th NPN pipe again and described 4th PNP pipe, and emitter meets supply voltage VCC;
The base stage of described 4th NPN pipe connects the output terminal of described second operational amplifier, collector connects the base stage of described 3rd PNP pipe and the base stage of collector and described 4th PNP pipe, and emitter connects the negative input end of described second operational amplifier and one end of described second resistance;
The negative input end of the second operational amplifier described in one termination of described second resistance and the emitter of described 4th NPN pipe, other end ground connection;
The base stage of described 4th PNP pipe connects the base stage of described 3rd PNP pipe and the collector of collector and described 4th NPN pipe, collector connects the P pole of the collector of described 3rd NPN pipe and the N pole of described first LED and described second LED, and emitter meets supply voltage VCC;
The P pole of described first LED meets supply voltage VCC, and N pole connects the collector of described 3rd NPN pipe and the collector of described 4th PNP pipe and the P pole of described second LED;
The P pole of described second LED connects the collector of described 3rd NPN pipe and the collector of described 4th PNP pipe and the N pole of described first LED, N pole ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520489443.1U CN204808089U (en) | 2015-07-03 | 2015-07-03 | Can judge electric current source of voltage height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520489443.1U CN204808089U (en) | 2015-07-03 | 2015-07-03 | Can judge electric current source of voltage height |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204808089U true CN204808089U (en) | 2015-11-25 |
Family
ID=54592878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520489443.1U Expired - Fee Related CN204808089U (en) | 2015-07-03 | 2015-07-03 | Can judge electric current source of voltage height |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204808089U (en) |
-
2015
- 2015-07-03 CN CN201520489443.1U patent/CN204808089U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20160703 |