JPS55131823A - Voltage-regulated power supply - Google Patents

Voltage-regulated power supply

Info

Publication number
JPS55131823A
JPS55131823A JP3901879A JP3901879A JPS55131823A JP S55131823 A JPS55131823 A JP S55131823A JP 3901879 A JP3901879 A JP 3901879A JP 3901879 A JP3901879 A JP 3901879A JP S55131823 A JPS55131823 A JP S55131823A
Authority
JP
Japan
Prior art keywords
voltage
load
resistance
output
resistance elements
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
JP3901879A
Other languages
Japanese (ja)
Inventor
Shuichi Uno
Shigeyoshi Igarashi
Masao Matsuda
Akira Kawaguchi
Tomonori Ishii
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3901879A priority Critical patent/JPS55131823A/en
Publication of JPS55131823A publication Critical patent/JPS55131823A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable a simply-constituted circuit to extract stably a voltage by varying it within an extremely small range, by changing an output voltage selectively to a fixed value by using an element for load voltage variation detection and resistance- value changing switch.
CONSTITUTION: Across load LD, fixed-resistance elements R1 and R2 are connected as load-voltage-variation detecting elements, and in parallel to those resistance elements R1 and R2, series circuits of resistance-value changing switches S1 and S2 and resistance elements R3 and R4 are connected respectively. Active element TR connected between input DC voltage Vi of this circuit and output DC voltage V supplying a voltage to load LD is supplied with the output of operational amplifier OPA which detects a difference between a voltage detected by resistance element R2 and reference voltage Vr. Then, voltages across resistance elements R1 and R2 are varied within an extremely small range by selectively operating switches S1 and S2 to control active element TR, thereby changing DC output voltage V applied to load LD.
COPYRIGHT: (C)1980,JPO&Japio
JP3901879A 1979-03-31 1979-03-31 Voltage-regulated power supply Pending JPS55131823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3901879A JPS55131823A (en) 1979-03-31 1979-03-31 Voltage-regulated power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3901879A JPS55131823A (en) 1979-03-31 1979-03-31 Voltage-regulated power supply

Publications (1)

Publication Number Publication Date
JPS55131823A true JPS55131823A (en) 1980-10-14

Family

ID=12541359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3901879A Pending JPS55131823A (en) 1979-03-31 1979-03-31 Voltage-regulated power supply

Country Status (1)

Country Link
JP (1) JPS55131823A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100481U (en) * 1981-12-25 1983-07-08 松下電器産業株式会社 DC power supply
JPS58159013U (en) * 1982-04-15 1983-10-24 加茂　邦宏 Constant voltage power supply with pulsating output
JPS58190003A (en) * 1982-04-30 1983-11-05 松下電器産業株式会社 Variable resistor drive device
JPH03242942A (en) * 1990-02-21 1991-10-29 Toshiba Corp Semiconductor integrated circuit
JPH042981U (en) * 1990-04-20 1992-01-10
JPH04340323A (en) * 1991-03-06 1992-11-26 Nippon Moriseru Kk Operation control circuit of power feeder

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100481U (en) * 1981-12-25 1983-07-08 松下電器産業株式会社 DC power supply
JPS58159013U (en) * 1982-04-15 1983-10-24 加茂　邦宏 Constant voltage power supply with pulsating output
JPS58190003A (en) * 1982-04-30 1983-11-05 松下電器産業株式会社 Variable resistor drive device
JPH03242942A (en) * 1990-02-21 1991-10-29 Toshiba Corp Semiconductor integrated circuit
JPH042981U (en) * 1990-04-20 1992-01-10
JPH04340323A (en) * 1991-03-06 1992-11-26 Nippon Moriseru Kk Operation control circuit of power feeder

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