JPS6451510A - Constant current generating circuit - Google Patents
Constant current generating circuitInfo
- Publication number
- JPS6451510A JPS6451510A JP20758887A JP20758887A JPS6451510A JP S6451510 A JPS6451510 A JP S6451510A JP 20758887 A JP20758887 A JP 20758887A JP 20758887 A JP20758887 A JP 20758887A JP S6451510 A JPS6451510 A JP S6451510A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- terminal
- resistance
- inverted input
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE:To widen the operation range of an output terminal in a constant current power and to obtain an accurate output current only by one pin at the time of integrating a semiconductor by biasing an inverted input terminal and connecting a non-inverted input terminal with a voltage power through a current power or resistances. CONSTITUTION:The output terminal of an operand amplifier A1 is connected with respective bases of transistors Q1 and Q2, and the emitter of the transistor Q1 is connected with a resistance R2 whose end terminal is connected with a power VEE. The emitter of the transistor Q2 is connected with a resistance R3 whose one end is connected with the power VEE. The inverted input terminal is earthed and the non-inverted input terminal is connected with one end of a resistance R1 and the collector of the transistor Q1 through a terminal P1. The voltage power VIN whose one end is earthed is connected with one end of a resistance R1. With setting the values of the resistances R2 and R3 small in a circuit thus connected, the base potential of the transistor Q2 can be reduced and the operation range of the collector of the transistor Q2, namely, the output terminal can be widened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20758887A JPS6451510A (en) | 1987-08-21 | 1987-08-21 | Constant current generating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20758887A JPS6451510A (en) | 1987-08-21 | 1987-08-21 | Constant current generating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6451510A true JPS6451510A (en) | 1989-02-27 |
Family
ID=16542252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20758887A Pending JPS6451510A (en) | 1987-08-21 | 1987-08-21 | Constant current generating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6451510A (en) |
-
1987
- 1987-08-21 JP JP20758887A patent/JPS6451510A/en active Pending
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