JPS56104508A - Protective circuit - Google Patents
Protective circuitInfo
- Publication number
- JPS56104508A JPS56104508A JP686980A JP686980A JPS56104508A JP S56104508 A JPS56104508 A JP S56104508A JP 686980 A JP686980 A JP 686980A JP 686980 A JP686980 A JP 686980A JP S56104508 A JPS56104508 A JP S56104508A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- transistor
- discharge
- aso
- transistors
- 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
Links
Landscapes
- Protection Of Static Devices (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To avoid the breakdown of an output transistor, by increasing the sucking current which performs a discharge of an output short-circuit capacitor using a transistor of Darlington constitution as the detection output of a safe working region (ASO).
CONSTITUTION: The ASO detection signal obtained from the transistor Q17 forms the sucking current which discharges the capacitor C1 by the Darlington-connected transistors Q20 and Q21. A Schmitt trigger circuit consists of the transistors Q22 and Q23, the emitter resistance R16 plus the collector resistances R17 and R18. When the capacitor C1 is discharged with the ASO detection signal in the Schmitt trigger circuit, the discharge is carried out by a large sucking current produced by the transistors Q20 and Q21. Thus a high-speed discharge is possible by increasing the capacity of the capacitor C1. As a result, the breaking strength can be increased for an output transistor.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP686980A JPS56104508A (en) | 1980-01-25 | 1980-01-25 | Protective circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP686980A JPS56104508A (en) | 1980-01-25 | 1980-01-25 | Protective circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56104508A true JPS56104508A (en) | 1981-08-20 |
JPS6324322B2 JPS6324322B2 (en) | 1988-05-20 |
Family
ID=11650233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP686980A Granted JPS56104508A (en) | 1980-01-25 | 1980-01-25 | Protective circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56104508A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112071833A (en) * | 2019-11-05 | 2020-12-11 | 友达光电股份有限公司 | Chip and method for manufacturing the same |
-
1980
- 1980-01-25 JP JP686980A patent/JPS56104508A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112071833A (en) * | 2019-11-05 | 2020-12-11 | 友达光电股份有限公司 | Chip and method for manufacturing the same |
CN112071833B (en) * | 2019-11-05 | 2023-05-09 | 友达光电股份有限公司 | Chip |
Also Published As
Publication number | Publication date |
---|---|
JPS6324322B2 (en) | 1988-05-20 |
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