JPH0262106A - Operational amplifier - Google Patents

Operational amplifier

Info

Publication number
JPH0262106A
JPH0262106A JP63213959A JP21395988A JPH0262106A JP H0262106 A JPH0262106 A JP H0262106A JP 63213959 A JP63213959 A JP 63213959A JP 21395988 A JP21395988 A JP 21395988A JP H0262106 A JPH0262106 A JP H0262106A
Authority
JP
Japan
Prior art keywords
output
terminal
positive
current
negative
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
JP63213959A
Other languages
Japanese (ja)
Other versions
JP2900373B2 (en
Inventor
Toshihiko Ichise
Original Assignee
Matsushita Electric Ind Co 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to JP63213959A priority Critical patent/JP2900373B2/en
Publication of JPH0262106A publication Critical patent/JPH0262106A/en
Application granted granted Critical
Publication of JP2900373B2 publication Critical patent/JP2900373B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a sufficient output voltage for operation by outputting from a positive power source to an output terminal, when the output voltage is positive, by a first current mirror circuit and outputting from an output edge terminal to a negative power source by a second current mirror circuit when the output voltage is negative.
CONSTITUTION: By the function of a polarity identifying circuit, and when the output electric power positive, by the function of a first current mirror circuit 9, the current flows from a supply voltage VDD to an output terminal. When the output voltage is negative, the current flows from output terminal to a negative input terminal VSS by the function of a second mirror circuit. When the potential of a positive input terminal 1 is higher than the potential of a negative input terminal 2, a transistor TR Q15 is conducted, TR Q17 is off and an output terminal 3 is lifted up to a positive supply voltage VDD side. At this time, TR Q7 is on, and through a resistance R16 to the circuit 9, the current flows. At the collector of TR Q22, the current of the product of the emitter area ratio of TR Q21 and Q22 and the collector current of TR Q21 flows, and the output terminal 3 is also lifted up to a VDD side. In the same way, when the potential of the negative input terminal 2 is higher than the potential of the terminal 1, the output is shifted to the VSS side.
COPYRIGHT: (C)1990,JPO&Japio
JP63213959A 1988-08-29 1988-08-29 Operational amplifier Expired - Fee Related JP2900373B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63213959A JP2900373B2 (en) 1988-08-29 1988-08-29 Operational amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63213959A JP2900373B2 (en) 1988-08-29 1988-08-29 Operational amplifier

Publications (2)

Publication Number Publication Date
JPH0262106A true JPH0262106A (en) 1990-03-02
JP2900373B2 JP2900373B2 (en) 1999-06-02

Family

ID=16647895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63213959A Expired - Fee Related JP2900373B2 (en) 1988-08-29 1988-08-29 Operational amplifier

Country Status (1)

Country Link
JP (1) JP2900373B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04117709A (en) * 1990-09-03 1992-04-17 Nec Ic Microcomput Syst Ltd Constant current circuit
US6064525A (en) * 1997-03-25 2000-05-16 Glaverbel Optical device including a dichromatic mirror
JP2014175983A (en) * 2013-03-12 2014-09-22 Toyota Central R&D Labs Inc Amplification circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04117709A (en) * 1990-09-03 1992-04-17 Nec Ic Microcomput Syst Ltd Constant current circuit
US6064525A (en) * 1997-03-25 2000-05-16 Glaverbel Optical device including a dichromatic mirror
JP2014175983A (en) * 2013-03-12 2014-09-22 Toyota Central R&D Labs Inc Amplification circuit

Also Published As

Publication number Publication date
JP2900373B2 (en) 1999-06-02

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees