JPS64807A - Current mirror circuit - Google Patents

Current mirror circuit

Info

Publication number
JPS64807A
JPS64807A JP62154488A JP15448887A JPS64807A JP S64807 A JPS64807 A JP S64807A JP 62154488 A JP62154488 A JP 62154488A JP 15448887 A JP15448887 A JP 15448887A JP S64807 A JPS64807 A JP S64807A
Authority
JP
Japan
Prior art keywords
voltage
input
terminal
current
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.)
Granted
Application number
JP62154488A
Other languages
Japanese (ja)
Other versions
JPH01807A (en
JPH0547124B2 (en
Inventor
Kazuo Kato
Hideo Sato
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62-154488A priority Critical patent/JPH01807A/en
Priority claimed from JP62-154488A external-priority patent/JPH01807A/en
Publication of JPS64807A publication Critical patent/JPS64807A/en
Publication of JPH01807A publication Critical patent/JPH01807A/en
Publication of JPH0547124B2 publication Critical patent/JPH0547124B2/ja
Granted legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To operate an input signal with a high precision by detecting the difference between the voltage of an input terminal and a preliminarily set reference voltage and performing the control in accordance with the difference output so that the voltage of the input terminal is constant.
CONSTITUTION: A negative feedback circuit 200 adjusts the current of a transistor TR 220 so that the voltage of a current mirror operation circuit input terminal 115 is equal to that of a reference input 211 of an amplifier 210. As the result, not only the voltage of the terminal 115 but also voltages of input terminals 111∼114 where forward voltages are approximately equal are controlled to the same reference value. Consequently, if a voltage V5 which is an approximate average value of operation input voltage V1∼V4 of operation inputs 111∼114 is impressed to the terminal 115, an arithmetic circuit 100 and an output current I0 are not dependent upon the variation of temperature or the like, and the output current I0 is given by I0=f(V1, V2, V3, V4) determined with inputs V1∼V4.
COPYRIGHT: (C)1989,JPO&Japio
JP62-154488A 1987-06-23 current mirror circuit Granted JPH01807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-154488A JPH01807A (en) 1987-06-23 current mirror circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-154488A JPH01807A (en) 1987-06-23 current mirror circuit

Publications (3)

Publication Number Publication Date
JPS64807A true JPS64807A (en) 1989-01-05
JPH01807A JPH01807A (en) 1989-01-05
JPH0547124B2 JPH0547124B2 (en) 1993-07-15

Family

ID=

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6261410A (en) * 1985-09-11 1987-03-18 Toshiba Corp Current mirror circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6261410A (en) * 1985-09-11 1987-03-18 Toshiba Corp Current mirror circuit

Also Published As

Publication number Publication date
JPH0547124B2 (en) 1993-07-15

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