JPS55108018A - Power supply unit - Google Patents

Power supply unit

Info

Publication number
JPS55108018A
JPS55108018A JP1473479A JP1473479A JPS55108018A JP S55108018 A JPS55108018 A JP S55108018A JP 1473479 A JP1473479 A JP 1473479A JP 1473479 A JP1473479 A JP 1473479A JP S55108018 A JPS55108018 A JP S55108018A
Authority
JP
Japan
Prior art keywords
power supply
circuit
voltage
output voltage
fed
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
JP1473479A
Other languages
Japanese (ja)
Other versions
JPS6357804B2 (en
Inventor
Masami Kawamoto
Shigehisa Uchida
Noboru Amatsuya
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 JP1473479A priority Critical patent/JPS55108018A/en
Publication of JPS55108018A publication Critical patent/JPS55108018A/en
Publication of JPS6357804B2 publication Critical patent/JPS6357804B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Television Receiver Circuits (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To achieve the selection means of power supply to the load circuit suitable for the remote control with a simple constitution, by effectively using the regulated power supply circuit having the switching element for control use.
CONSTITUTION: The power input unregulated is switched and smoothed with the switching transistor Tr6 controlling the regulated power supply circuit 1, and the output voltage is fed to the reception circuit. The output voltage is divided with the resistors 15, 16 and fed to the base of Tr17 for error detection, it is compared with the reference voltage set with the Zener diode 14 in advance, the conduction period of Tr6 is controlled with the result of comparison to regulate the output voltage. The output voltage is detected with Tr28, 29 of the power supply selection circuit 2 and the remote control reception circuit 27, and control voltage is fed to the protection circuit 20 when the voltage is less than a given voltage, Tr6 is interrupted with the protection circuit 20 to simplify the selection of the power supply to the reception circuit.
COPYRIGHT: (C)1980,JPO&Japio
JP1473479A 1979-02-09 1979-02-09 Power supply unit Granted JPS55108018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1473479A JPS55108018A (en) 1979-02-09 1979-02-09 Power supply unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1473479A JPS55108018A (en) 1979-02-09 1979-02-09 Power supply unit

Publications (2)

Publication Number Publication Date
JPS55108018A true JPS55108018A (en) 1980-08-19
JPS6357804B2 JPS6357804B2 (en) 1988-11-14

Family

ID=11869346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1473479A Granted JPS55108018A (en) 1979-02-09 1979-02-09 Power supply unit

Country Status (1)

Country Link
JP (1) JPS55108018A (en)

Also Published As

Publication number Publication date
JPS6357804B2 (en) 1988-11-14

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