JPS5580125A - Constant-voltage power circuit - Google Patents

Constant-voltage power circuit

Info

Publication number
JPS5580125A
JPS5580125A JP15349678A JP15349678A JPS5580125A JP S5580125 A JPS5580125 A JP S5580125A JP 15349678 A JP15349678 A JP 15349678A JP 15349678 A JP15349678 A JP 15349678A JP S5580125 A JPS5580125 A JP S5580125A
Authority
JP
Japan
Prior art keywords
voltage
power circuit
constant
diode
lamp
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
JP15349678A
Other languages
Japanese (ja)
Inventor
Toshio Kanai
Shigeru Yamaguchi
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 JP15349678A priority Critical patent/JPS5580125A/en
Publication of JPS5580125A publication Critical patent/JPS5580125A/en
Pending legal-status Critical Current

Links

Landscapes

  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE:To make it possible to set instantaneously an operation state by turning a power switch ON, by interposing a diode between a connection point between a load and resistance and the output terminal of a series control transistor. CONSTITUTION:Series control transistor Tr1 is connected in series between an astable power circuit and load 2 including components small in resistance value such as lamp 8 while it is cold. On the basis of variation in output voltage, the conductivity of Tr1 is controlled by error amplifying Tr4 and diode 10 is inserted between the connection point between load 2 and resistance 9 and the output terminal of Tr1. Consequently, when a constant-voltage power circuit gets stationary, the across voltage of lamp 8 is equivalent to a difference between the output voltage of a radio voltage and the constant forward voltage of diode 10 and lamp 8 is applied with a stabilized voltage. Therefore, an operation state can instantaneously be set by turning the power switch ON.
JP15349678A 1978-12-11 1978-12-11 Constant-voltage power circuit Pending JPS5580125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15349678A JPS5580125A (en) 1978-12-11 1978-12-11 Constant-voltage power circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15349678A JPS5580125A (en) 1978-12-11 1978-12-11 Constant-voltage power circuit

Publications (1)

Publication Number Publication Date
JPS5580125A true JPS5580125A (en) 1980-06-17

Family

ID=15563820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15349678A Pending JPS5580125A (en) 1978-12-11 1978-12-11 Constant-voltage power circuit

Country Status (1)

Country Link
JP (1) JPS5580125A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4818330U (en) * 1971-07-09 1973-03-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4818330U (en) * 1971-07-09 1973-03-01

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