JPS5583461A - Power supply circuit - Google Patents

Power supply circuit

Info

Publication number
JPS5583461A
JPS5583461A JP15803178A JP15803178A JPS5583461A JP S5583461 A JPS5583461 A JP S5583461A JP 15803178 A JP15803178 A JP 15803178A JP 15803178 A JP15803178 A JP 15803178A JP S5583461 A JPS5583461 A JP S5583461A
Authority
JP
Japan
Prior art keywords
oscillator
mutual interference
regulator
power supply
timings
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
JP15803178A
Other languages
Japanese (ja)
Inventor
Fumio Asano
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15803178A priority Critical patent/JPS5583461A/en
Publication of JPS5583461A publication Critical patent/JPS5583461A/en
Pending legal-status Critical Current

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  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To prevent the chopper transistor from malfunctioning and reduce the leakage of noise by shifting the timings of two switching operations to avoid the mutual interference therebetween.
CONSTITUTION: As a control circuit for preventing the mutual interference, an oscillator 1 and flip-flops 2, 3 are attached to a switching regulator which consists of a pre-regulator and a separately excited inverter. Chopper circuits Tr1, Tr2 and a switch of an inverter 6 are controlled through the oscillator 1, namely actuated by rising of an output from the oscillator and falling thereof, respectively. In addition, duty ratio of the oscillating output is set other than 1 to obtain the unsymmetrical pulse wave form. By so doing, it is positively prevented that two switching operations are performed at the same timings.
COPYRIGHT: (C)1980,JPO&Japio
JP15803178A 1978-12-19 1978-12-19 Power supply circuit Pending JPS5583461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15803178A JPS5583461A (en) 1978-12-19 1978-12-19 Power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15803178A JPS5583461A (en) 1978-12-19 1978-12-19 Power supply circuit

Publications (1)

Publication Number Publication Date
JPS5583461A true JPS5583461A (en) 1980-06-23

Family

ID=15662753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15803178A Pending JPS5583461A (en) 1978-12-19 1978-12-19 Power supply circuit

Country Status (1)

Country Link
JP (1) JPS5583461A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58220397A (en) * 1982-06-15 1983-12-21 松下電工株式会社 Device for firing discharge lamp
JPS6135162A (en) * 1984-07-13 1986-02-19 ジーメンス・アクチエンゲゼルシヤフト A circuit device that supplies power to an electrical load via a switching regulator
JPS61139265A (en) * 1984-12-07 1986-06-26 Hitachi Ltd Multiple power source system
US4805078A (en) * 1986-07-03 1989-02-14 Siemens Aktiengesellschaft Switched power supply for generating a plurality of isolated power voltage for a pulse converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58220397A (en) * 1982-06-15 1983-12-21 松下電工株式会社 Device for firing discharge lamp
JPS6135162A (en) * 1984-07-13 1986-02-19 ジーメンス・アクチエンゲゼルシヤフト A circuit device that supplies power to an electrical load via a switching regulator
JPS61139265A (en) * 1984-12-07 1986-06-26 Hitachi Ltd Multiple power source system
US4805078A (en) * 1986-07-03 1989-02-14 Siemens Aktiengesellschaft Switched power supply for generating a plurality of isolated power voltage for a pulse converter

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