JPS5422550A - Overvoltage protective circuit - Google Patents
Overvoltage protective circuitInfo
- Publication number
- JPS5422550A JPS5422550A JP8736577A JP8736577A JPS5422550A JP S5422550 A JPS5422550 A JP S5422550A JP 8736577 A JP8736577 A JP 8736577A JP 8736577 A JP8736577 A JP 8736577A JP S5422550 A JPS5422550 A JP S5422550A
- Authority
- JP
- Japan
- Prior art keywords
- protective circuit
- overvoltage protective
- load
- overvoltage
- 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.)
- Pending
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To protect load from overvoltage breakdown by detecting the power voltage with zener diodes and transistors when it rises and immediately cutting off the transistor connected between the power source and load.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8736577A JPS5422550A (en) | 1977-07-22 | 1977-07-22 | Overvoltage protective circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8736577A JPS5422550A (en) | 1977-07-22 | 1977-07-22 | Overvoltage protective circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5422550A true JPS5422550A (en) | 1979-02-20 |
Family
ID=13912858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8736577A Pending JPS5422550A (en) | 1977-07-22 | 1977-07-22 | Overvoltage protective circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5422550A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007142015A1 (en) * | 2006-06-06 | 2007-12-13 | Ricoh Company, Ltd. | Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection ciruit |
-
1977
- 1977-07-22 JP JP8736577A patent/JPS5422550A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007142015A1 (en) * | 2006-06-06 | 2007-12-13 | Ricoh Company, Ltd. | Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection ciruit |
US7864495B2 (en) | 2006-06-06 | 2011-01-04 | Ricoh Company, Ltd. | Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection circuit |
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