JPS6450459A - Semiconductor device - Google Patents
Semiconductor deviceInfo
- Publication number
- JPS6450459A JPS6450459A JP62207683A JP20768387A JPS6450459A JP S6450459 A JPS6450459 A JP S6450459A JP 62207683 A JP62207683 A JP 62207683A JP 20768387 A JP20768387 A JP 20768387A JP S6450459 A JPS6450459 A JP S6450459A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- vcc
- gate electrode
- channel field
- effect transistor
- 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
Abstract
PURPOSE:To improve breakdown voltage against the surge of a power source voltage (Vcc) by providing a second P-channel field effect transistor on the side of gate electrode of a P-channel field-effect transistor of an input protective circuit. CONSTITUTION:Another P-channel field effect transistor 5 is added at the gate electrode of a P-channel field effect transistor 3 of a conventional input protective circuit, and the added transistor 5 is so connected at its gate electrode to a GND 2 as to always hold in an ON state. Accordingly, when a source electrode is connected to a Vcc 1, the Vcc 1 is output to a drain electrode. The drain electrode is connected to the gate electrode of the transistor 3 of the input protective circuit to turn OFF the transistor 3. Since the added transistor 5 has a diode structure, if a surge rides on the Vcc 1, it is absorbed but it is not applied to the gate electrode of the transistor 3. Thus, the surge breakdown voltage of the Vcc is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62207683A JPS6450459A (en) | 1987-08-20 | 1987-08-20 | Semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62207683A JPS6450459A (en) | 1987-08-20 | 1987-08-20 | Semiconductor device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450459A true JPS6450459A (en) | 1989-02-27 |
Family
ID=16543845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62207683A Pending JPS6450459A (en) | 1987-08-20 | 1987-08-20 | Semiconductor device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450459A (en) |
-
1987
- 1987-08-20 JP JP62207683A patent/JPS6450459A/en active Pending
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