JPS55162127A - Actuating circuit of digital unit - Google Patents

Actuating circuit of digital unit

Info

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
Application number
JP6861179A
Other languages
Japanese (ja)
Inventor
Yasuo Nakai
Yoshikatsu Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP6861179A priority Critical patent/JPS55162127A/en
Publication of JPS55162127A publication Critical patent/JPS55162127A/en
Pending legal-status Critical Current

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
JP6861179A 1979-05-31 1979-05-31 Actuating circuit of digital unit Pending JPS55162127A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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