JPS5629727A - Reset signal generating circuit - Google Patents
Reset signal generating circuitInfo
- Publication number
- JPS5629727A JPS5629727A JP10633879A JP10633879A JPS5629727A JP S5629727 A JPS5629727 A JP S5629727A JP 10633879 A JP10633879 A JP 10633879A JP 10633879 A JP10633879 A JP 10633879A JP S5629727 A JPS5629727 A JP S5629727A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- reset signal
- terminal
- transistors
- power source
- 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
Abstract
PURPOSE: To ensure a simple and assured generation of the reset signal during the ON and OFF of the power source and thus prevent the faulty operation, by providing three units of transistors and then performing the detection of the reset signal while the power source is on as well as the detection of the short break while the power source is off each through the combinations of the three transistors.
CONSTITUTION: Three transistors TR6, 9 and 10 are provided. The emitter of each transistor is connected to the output terminal B of the 2nd voltage 15V in the power supply circuit 1 via the resistance 11. And the collectors of the TR6 and 9 are connected to the reset terminal D of the integrated circuit 25 via the serial resistor 23, the time constant circuit 22 and then the TR20 each. The capacitor 3 is charged a little after the circuit 1 is switched on, and this charging voltage becomes higher than the base voltage of the TR10. At the same time, the TR6 is turned off, and the reset signal of the terminal D does not exist any more. On the other hand, the 1st power supply voltage 5V has a quick rise when the circuit 1 is switched off. And the TR9 is turned on with the TR20's collector biased negative each. Thus the terminal D is biased negative to prevent the faulty operation of the circuit 25.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54106338A JPS5826049B2 (en) | 1979-08-20 | 1979-08-20 | Reset signal generation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54106338A JPS5826049B2 (en) | 1979-08-20 | 1979-08-20 | Reset signal generation circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5629727A true JPS5629727A (en) | 1981-03-25 |
JPS5826049B2 JPS5826049B2 (en) | 1983-05-31 |
Family
ID=14431059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54106338A Expired JPS5826049B2 (en) | 1979-08-20 | 1979-08-20 | Reset signal generation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5826049B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6426748U (en) * | 1987-08-07 | 1989-02-15 |
-
1979
- 1979-08-20 JP JP54106338A patent/JPS5826049B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5826049B2 (en) | 1983-05-31 |
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