JPS6412719A - Initial value setting circuit - Google Patents
Initial value setting circuitInfo
- Publication number
- JPS6412719A JPS6412719A JP16902287A JP16902287A JPS6412719A JP S6412719 A JPS6412719 A JP S6412719A JP 16902287 A JP16902287 A JP 16902287A JP 16902287 A JP16902287 A JP 16902287A JP S6412719 A JPS6412719 A JP S6412719A
- Authority
- JP
- Japan
- Prior art keywords
- initial value
- output terminal
- value setting
- setting circuit
- level
- 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
- Electronic Switches (AREA)
Abstract
PURPOSE:To surely output an initial value even when a source voltage drops in a moment due to momentary power failure, etc., by connecting a P-channel MOS transistor whose gate is connected to a power source line to a capacitor in parallel. CONSTITUTION:The source of the P-channel MOS transistor is connected to the output terminal of an initial value setting circuit, and its gate to the power source line, and its drain to the ground, and the output terminal 4 is connected to the input terminal of an inverter 5. When the source voltage drops in a moment due to the momentary power failure, etc., the P-channel MOS transistor 9 is energized, and electric charge accumulated in the capacitor 3 is discharged, then, the level of the output terminal of the initial value setting circuit goes to a low level. Next, when the source voltage begins to increase again, the P-channel MOS transistor 9 is cut off, thereby, the level of the output terminal of the initial value setting circuit goes to the low level, and it is possible to set the level of the output terminal 8 in an OR circuit 6 at a high level uniquely.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16902287A JPS6412719A (en) | 1987-07-07 | 1987-07-07 | Initial value setting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16902287A JPS6412719A (en) | 1987-07-07 | 1987-07-07 | Initial value setting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6412719A true JPS6412719A (en) | 1989-01-17 |
Family
ID=15878873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16902287A Pending JPS6412719A (en) | 1987-07-07 | 1987-07-07 | Initial value setting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6412719A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005091503A1 (en) * | 2004-03-19 | 2005-09-29 | Renesas Technology Corp. | Semiconductor integrated circuit device |
-
1987
- 1987-07-07 JP JP16902287A patent/JPS6412719A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005091503A1 (en) * | 2004-03-19 | 2005-09-29 | Renesas Technology Corp. | Semiconductor integrated circuit device |
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