JPS57132408A - Protecting circuit for output of operational amplifier - Google Patents

Protecting circuit for output of operational amplifier

Info

Publication number
JPS57132408A
JPS57132408A JP56017724A JP1772481A JPS57132408A JP S57132408 A JPS57132408 A JP S57132408A JP 56017724 A JP56017724 A JP 56017724A JP 1772481 A JP1772481 A JP 1772481A JP S57132408 A JPS57132408 A JP S57132408A
Authority
JP
Japan
Prior art keywords
operational amplifier
diodes
electric power
terminal
output
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
JP56017724A
Other languages
Japanese (ja)
Inventor
Takanori Seki
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.)
Ando Electric Co Ltd
Original Assignee
Ando Electric 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 Ando Electric Co Ltd filed Critical Ando Electric Co Ltd
Priority to JP56017724A priority Critical patent/JPS57132408A/en
Publication of JPS57132408A publication Critical patent/JPS57132408A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To exert no influence on an output of an operational amplifier in a normal state, by providing plural diodes connected to the operational amplifier, and opening a circuit so that an excessive input provided from the outside is not provided to the operational amplifier.
CONSTITUTION: Diodes 2, 3 are connected in series so that the polarity is opposite to each other. An electric power source 4 supplies electric power to a connecting point 6a of the diodes 2, 3, and an electric power source 5 supplies electric power to connecting points 6b, 6c. In this state, the diodes 2, 3 are made to conduct by the electric power sources 4, 5. An input signal of a terminal 7 is amplified by an operational amplifier 1, and reaches a terminal 8 through the diodes 2, 3. The diodes 2, 3 are always in an on-state since they are connected in series between an output of the operational amplifier 1 and the terminal 8, and electric power is supplied from the electric power sources 4, 5. Accordingly, the output of the operational amplifier can be fetched from the terminal 8 in a state that there is scarcely loss. If an excessive input is provided to the terminal 8, one of the diodes 2, 3 cuts the excessive input by the polarity of this excessive input, and prevents the excessive input from reaching the operational amplifier 1.
COPYRIGHT: (C)1982,JPO&Japio
JP56017724A 1981-02-09 1981-02-09 Protecting circuit for output of operational amplifier Pending JPS57132408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56017724A JPS57132408A (en) 1981-02-09 1981-02-09 Protecting circuit for output of operational amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56017724A JPS57132408A (en) 1981-02-09 1981-02-09 Protecting circuit for output of operational amplifier

Publications (1)

Publication Number Publication Date
JPS57132408A true JPS57132408A (en) 1982-08-16

Family

ID=11951688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56017724A Pending JPS57132408A (en) 1981-02-09 1981-02-09 Protecting circuit for output of operational amplifier

Country Status (1)

Country Link
JP (1) JPS57132408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645417A1 (en) * 1995-11-07 1997-05-15 Tektronix Inc Input protection for wide bandwidth amplifiers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4328598Y1 (en) * 1964-09-03 1968-11-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4328598Y1 (en) * 1964-09-03 1968-11-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645417A1 (en) * 1995-11-07 1997-05-15 Tektronix Inc Input protection for wide bandwidth amplifiers
DE19645417C2 (en) * 1995-11-07 1998-10-08 Tektronix Inc Input protection for wide bandwidth amplifiers

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