JPS6451510A - Constant current generating circuit - Google Patents

Constant current generating circuit

Info

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
Application number
JP20758887A
Other languages
Japanese (ja)
Inventor
Minoru Tanaka
Takashi Sakaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP20758887A priority Critical patent/JPS6451510A/en
Publication of JPS6451510A publication Critical patent/JPS6451510A/en
Pending legal-status Critical Current

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.
JP20758887A 1987-08-21 1987-08-21 Constant current generating circuit Pending JPS6451510A (en)

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)

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