JPS5580128A - Switching type constant-voltage circuit - Google Patents

Switching type constant-voltage circuit

Info

Publication number
JPS5580128A
JPS5580128A JP15540678A JP15540678A JPS5580128A JP S5580128 A JPS5580128 A JP S5580128A JP 15540678 A JP15540678 A JP 15540678A JP 15540678 A JP15540678 A JP 15540678A JP S5580128 A JPS5580128 A JP S5580128A
Authority
JP
Japan
Prior art keywords
resistance
transistor
terminal
bias
voltage circuit
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.)
Granted
Application number
JP15540678A
Other languages
Japanese (ja)
Other versions
JPS5624289B2 (en
Inventor
Genzo Otani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15540678A priority Critical patent/JPS5580128A/en
Publication of JPS5580128A publication Critical patent/JPS5580128A/en
Publication of JPS5624289B2 publication Critical patent/JPS5624289B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to operate a transistor immediately when a power switch is turned OFF and then ON soon, by connecting one terminal of the bias resistance of a control transistor to the output terminal of a starting transistor.
CONSTITUTION: One terminal of resistance 21 between base bias resistances 21 and 9 of control transistor Tr7 is connected to the emitter of starting Tr4. Consequently, charging currents flow from the emitter of Tr4 to resistance 9 and capacitor 10 via resistance 21 and Tr4 operates staying nearly cut off to flow a little current, so that a low-power resistance can be used as bias resistance 9. Further, when the power switch is turned OFF and then ON soon, capacitor 10 is instantaneously discharged by way of resistance 21, reverse-current preventive diode 20 and control circuit 12, so that Tr4 can be operated immediately.
COPYRIGHT: (C)1980,JPO&Japio
JP15540678A 1978-12-13 1978-12-13 Switching type constant-voltage circuit Granted JPS5580128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15540678A JPS5580128A (en) 1978-12-13 1978-12-13 Switching type constant-voltage circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15540678A JPS5580128A (en) 1978-12-13 1978-12-13 Switching type constant-voltage circuit

Publications (2)

Publication Number Publication Date
JPS5580128A true JPS5580128A (en) 1980-06-17
JPS5624289B2 JPS5624289B2 (en) 1981-06-05

Family

ID=15605274

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15540678A Granted JPS5580128A (en) 1978-12-13 1978-12-13 Switching type constant-voltage circuit

Country Status (1)

Country Link
JP (1) JPS5580128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953690U (en) * 1982-09-30 1984-04-09 日本電気ホームエレクトロニクス株式会社 power circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953690U (en) * 1982-09-30 1984-04-09 日本電気ホームエレクトロニクス株式会社 power circuit

Also Published As

Publication number Publication date
JPS5624289B2 (en) 1981-06-05

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