JPS59192970A - Detecting circuit for voltage variation - Google Patents

Detecting circuit for voltage variation

Info

Publication number
JPS59192970A
JPS59192970A JP6724883A JP6724883A JPS59192970A JP S59192970 A JPS59192970 A JP S59192970A JP 6724883 A JP6724883 A JP 6724883A JP 6724883 A JP6724883 A JP 6724883A JP S59192970 A JPS59192970 A JP S59192970A
Authority
JP
Japan
Prior art keywords
voltage
varies
resistance
voltage variation
variation
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
JP6724883A
Other languages
Japanese (ja)
Inventor
Hideki Nishikura
Original Assignee
Matsushita 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP6724883A priority Critical patent/JPS59192970A/en
Publication of JPS59192970A publication Critical patent/JPS59192970A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect variation in power voltage over a wide range by using a semiconductor element which varies in resistance value freely as an equivalent resistance between output terminals of a diode bridge.
CONSTITUTION: The semiconductor element 1 which varies in internal resistance value freely is used as the equivalent resistance between output terminals of the diode bridge DB formed of diodes D1WD4 connected to a power source through a capacitor C1. This element 1 is controlled to increase the internal resistance of the element 1, and then the time constant determined by this resistance and capacity of the capacitor C1 increases; even when a source voltage varies slowly, a corresponding detection voltage is developed across the element 1 and rises above a reference voltage, so that a comparator 2 outputs a detection signal for the source voltage variation. Therefore, the source voltage variation such as a rise and a fall over a wide range is detected.
COPYRIGHT: (C)1984,JPO&Japio
JP6724883A 1983-04-15 1983-04-15 Detecting circuit for voltage variation Pending JPS59192970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6724883A JPS59192970A (en) 1983-04-15 1983-04-15 Detecting circuit for voltage variation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6724883A JPS59192970A (en) 1983-04-15 1983-04-15 Detecting circuit for voltage variation

Publications (1)

Publication Number Publication Date
JPS59192970A true JPS59192970A (en) 1984-11-01

Family

ID=13339427

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6724883A Pending JPS59192970A (en) 1983-04-15 1983-04-15 Detecting circuit for voltage variation

Country Status (1)

Country Link
JP (1) JPS59192970A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5953765A (en) * 1996-02-21 1999-09-21 Aisin Seiki Kabushiki Kaisha Sanitary device having commonly driven washing and drying devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5953765A (en) * 1996-02-21 1999-09-21 Aisin Seiki Kabushiki Kaisha Sanitary device having commonly driven washing and drying devices

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