JPS5598622A - Electromagnetic valve driving circuit - Google Patents
Electromagnetic valve driving circuitInfo
- Publication number
- JPS5598622A JPS5598622A JP605579A JP605579A JPS5598622A JP S5598622 A JPS5598622 A JP S5598622A JP 605579 A JP605579 A JP 605579A JP 605579 A JP605579 A JP 605579A JP S5598622 A JPS5598622 A JP S5598622A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- high voltage
- voltage
- driving circuit
- electromagnetic valve
- 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
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To enable to protect an electromagnetic coil driving transistor, by positively disconnecting the transistor when an extraordinary high voltage is produced.
CONSTITUTION: In case that an extraordinarily high voltage is applied in power- source line 305 and the voltage becmes higher than the Zener voltage determined by Zener diode 304, current is passed to the base of control transistor 6 via resistance 302 and Zener diode 304 and transistor 6 is turned On, so that driving transistor 3 is turned OFF. Therefore, overcurrent is not passed in transistor 3 so that it is protected from rupture. When application of the extraordinary high voltage in power-source line 305 is removed, transistor 3 returns to its ordinary operation by the output pulse of function generator 200.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP605579A JPS5598622A (en) | 1979-01-24 | 1979-01-24 | Electromagnetic valve driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP605579A JPS5598622A (en) | 1979-01-24 | 1979-01-24 | Electromagnetic valve driving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5598622A true JPS5598622A (en) | 1980-07-26 |
Family
ID=11627916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP605579A Pending JPS5598622A (en) | 1979-01-24 | 1979-01-24 | Electromagnetic valve driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5598622A (en) |
-
1979
- 1979-01-24 JP JP605579A patent/JPS5598622A/en active Pending
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