JPS55162127A - Actuating circuit of digital unit - Google Patents
Actuating circuit of digital unitInfo
- Publication number
- JPS55162127A JPS55162127A JP6861179A JP6861179A JPS55162127A JP S55162127 A JPS55162127 A JP S55162127A JP 6861179 A JP6861179 A JP 6861179A JP 6861179 A JP6861179 A JP 6861179A JP S55162127 A JPS55162127 A JP S55162127A
- Authority
- JP
- Japan
- Prior art keywords
- power
- circuit
- signal
- failure
- unit
- 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 make it possible to secure power-ON resetting operation even in case of the memontary power failure of a unit power source, by exercising control over the power-ON resetting operation by the power-failure detecting signal of the unit power source.
CONSTITUTION: Power-failure detecting circuit 4 and reset stabilizing circuit 5 are newly provided. Once a momentary power failure happens to unit power source V(24V) and input voltage Va of power circuit 2 becomes less than a power-failure detection level, any current does not flow through photodiode PD any more, and phototransistor PT turns OFF to hold power-failure detection signal PN at "H". Next, signal PN turns ON transistor Q1 of circuit 5 to discharge capacitor C1 of power-ON resetting circuit 3 and as a charging voltage across capacitor C1 decreases down to zero, reset signal RS of digital unit 1 appears at the output of inverter IV. This signal RS continues until the charging voltage reaches the threshold voltage of inverter IV.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6861179A JPS55162127A (en) | 1979-05-31 | 1979-05-31 | Actuating circuit of digital unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6861179A JPS55162127A (en) | 1979-05-31 | 1979-05-31 | Actuating circuit of digital unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55162127A true JPS55162127A (en) | 1980-12-17 |
Family
ID=13378727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6861179A Pending JPS55162127A (en) | 1979-05-31 | 1979-05-31 | Actuating circuit of digital unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55162127A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57161034U (en) * | 1981-03-30 | 1982-10-09 | ||
JPS59138925U (en) * | 1983-03-03 | 1984-09-17 | 株式会社チノ− | Printed board |
JPS60192024U (en) * | 1984-05-25 | 1985-12-20 | 松下電工株式会社 | Power supply for microprocessor |
-
1979
- 1979-05-31 JP JP6861179A patent/JPS55162127A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57161034U (en) * | 1981-03-30 | 1982-10-09 | ||
JPH0313783Y2 (en) * | 1981-03-30 | 1991-03-28 | ||
JPS59138925U (en) * | 1983-03-03 | 1984-09-17 | 株式会社チノ− | Printed board |
JPH0318988Y2 (en) * | 1983-03-03 | 1991-04-22 | ||
JPS60192024U (en) * | 1984-05-25 | 1985-12-20 | 松下電工株式会社 | Power supply for microprocessor |
JPH0530192Y2 (en) * | 1984-05-25 | 1993-08-02 |
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