JPS5696306A - Direct current regulated power supply device - Google Patents

Direct current regulated power supply device

Info

Publication number
JPS5696306A
JPS5696306A JP17277479A JP17277479A JPS5696306A JP S5696306 A JPS5696306 A JP S5696306A JP 17277479 A JP17277479 A JP 17277479A JP 17277479 A JP17277479 A JP 17277479A JP S5696306 A JPS5696306 A JP S5696306A
Authority
JP
Japan
Prior art keywords
voltage
power supply
constant
output
fet18
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
JP17277479A
Other languages
Japanese (ja)
Inventor
Suwao Sato
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.)
SANWA DENKI KK
Original Assignee
SANWA DENKI KK
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 SANWA DENKI KK filed Critical SANWA DENKI KK
Priority to JP17277479A priority Critical patent/JPS5696306A/en
Publication of JPS5696306A publication Critical patent/JPS5696306A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent fluctuation of the reference power source from appearing in the output voltage, by taking out the charging voltage of the capacitor, which is charged for a prescribed time by the reference power source of the constant-voltage characteristic, as the reference voltage of the regulated power supply circuit through a buffer.
CONSTITUTION: The AC power to terminals 8 and 9 is subjected to full-wave rectification to output a DC voltage to terminals 10 and 11, and the constant voltage output of Zener diode ZD14 connected to these terminals through resistance R4 is connected to switch SW16 of timer relay 15. At the AC power supply time, SW16 is turned on, and the constant voltage of ZD14 charges capacitor (C)17. After a prescribed time constant, relay 15 is operated to turn off SW16, and the charging voltage of C17 is supplied to the gate of FET18 of the buffer stage. The terminal voltage of resistance R5 connected to the drain of FET18 is supplied as the reference voltage of differential amplifier 19, and amplifier 19 is so operated that the error between the regulated voltage across resistances R6 and R7 and the reference voltage is cancelled through amplifier 20. The potential of C17 is connected for a long time because the gate of FET18 is high-resistance, and fluctuation of ZD is not generated in the output voltage.
COPYRIGHT: (C)1981,JPO&Japio
JP17277479A 1979-12-28 1979-12-28 Direct current regulated power supply device Pending JPS5696306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17277479A JPS5696306A (en) 1979-12-28 1979-12-28 Direct current regulated power supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17277479A JPS5696306A (en) 1979-12-28 1979-12-28 Direct current regulated power supply device

Publications (1)

Publication Number Publication Date
JPS5696306A true JPS5696306A (en) 1981-08-04

Family

ID=15948083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17277479A Pending JPS5696306A (en) 1979-12-28 1979-12-28 Direct current regulated power supply device

Country Status (1)

Country Link
JP (1) JPS5696306A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961496A (en) * 1982-09-29 1984-04-07 Royal Seisakusho:Kk Rotating speed control circuit for dental dc motor
US6052987A (en) * 1997-11-14 2000-04-25 Trw Inc. Non-propellant fluid cooled space craft rocket engine
JP2008165286A (en) * 2006-12-27 2008-07-17 Semiconductor Energy Lab Co Ltd Constant-voltage circuit and semiconductor device equipped with the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961496A (en) * 1982-09-29 1984-04-07 Royal Seisakusho:Kk Rotating speed control circuit for dental dc motor
US6052987A (en) * 1997-11-14 2000-04-25 Trw Inc. Non-propellant fluid cooled space craft rocket engine
JP2008165286A (en) * 2006-12-27 2008-07-17 Semiconductor Energy Lab Co Ltd Constant-voltage circuit and semiconductor device equipped with the same

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