JPS57132408A - Protecting circuit for output of operational amplifier - Google Patents
Protecting circuit for output of operational amplifierInfo
- 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
Links
Landscapes
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4328598Y1 (en) * | 1964-09-03 | 1968-11-25 |
-
1981
- 1981-02-09 JP JP56017724A patent/JPS57132408A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4328598Y1 (en) * | 1964-09-03 | 1968-11-25 |
Cited By (2)
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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