JPS5647815A - Stabilized electric power supply unit - Google Patents

Stabilized electric power supply unit

Info

Publication number
JPS5647815A
JPS5647815A JP12348479A JP12348479A JPS5647815A JP S5647815 A JPS5647815 A JP S5647815A JP 12348479 A JP12348479 A JP 12348479A JP 12348479 A JP12348479 A JP 12348479A JP S5647815 A JPS5647815 A JP S5647815A
Authority
JP
Japan
Prior art keywords
voltage
output
conducts
power supply
electric power
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
JP12348479A
Other languages
Japanese (ja)
Inventor
Masuo Nakajima
Kyoichi Ito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12348479A priority Critical patent/JPS5647815A/en
Publication of JPS5647815A publication Critical patent/JPS5647815A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prevent a malfunction when the electric power supply is turned on, by separating the control electric supply circuit one by one, and also controlling the making time adequately.
CONSTITUTION: When voltage E(v) is applied, a current starts to flow immediately into the light emission diode 621, and a phototransistor 611 conducts, therefore a transistor 31 also conducts, and the output voltage e1(v) equal to Zener voltage of a Zener diode 41 is output. On the other hand, a current i3 flowing in the light emission diode 622 is increased slowly by the influence of a capacitor connected in parallel, therefore the phototransistor 612 does not conduct instantaneously but conducts after a prescribed period of time decided by the capacitor 71 and the resistor 23. Accordingly, the voltage e2(v) which is output to the terminal 52 is output, being delayed by a prescribed period of time after the input voltage E(v) has been applied.
COPYRIGHT: (C)1981,JPO&Japio
JP12348479A 1979-09-26 1979-09-26 Stabilized electric power supply unit Pending JPS5647815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12348479A JPS5647815A (en) 1979-09-26 1979-09-26 Stabilized electric power supply unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12348479A JPS5647815A (en) 1979-09-26 1979-09-26 Stabilized electric power supply unit

Publications (1)

Publication Number Publication Date
JPS5647815A true JPS5647815A (en) 1981-04-30

Family

ID=14861765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12348479A Pending JPS5647815A (en) 1979-09-26 1979-09-26 Stabilized electric power supply unit

Country Status (1)

Country Link
JP (1) JPS5647815A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63110920U (en) * 1986-12-30 1988-07-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63110920U (en) * 1986-12-30 1988-07-16

Similar Documents

Publication Publication Date Title
JPS57124946A (en) Pulse detection circuit
AU538517B2 (en) Power supply apparatus
JPS5537610A (en) Microcomputer reset circuit
JPS57204630A (en) Control circuit of pulse width
JPS56116135A (en) Electric power supply circuit
JPS5647815A (en) Stabilized electric power supply unit
JPS57103522A (en) Power supply device
JPS551653A (en) Switching unit
JPS6485572A (en) Starting circuit for switching power source
JPS5735422A (en) Semiconductor circuit
JPS56159716A (en) Direct-current electric power device
JPS6430430A (en) Power source circuit
JPS5710820A (en) Constant voltage power supply device
NO830473L (en) POWER SUPPLY CIRCUIT FOR A CONTROL CONTACT.
JPS55123716A (en) Malfunction prevention unit of control system
KR840006422A (en) Power supply control circuit
JPS54555A (en) Automatic gain control unit
JPS57196623A (en) Output controlling circuit
JPS54136619A (en) Dc voltage stabilized power unit
JPS6438664A (en) Holding circuit
JPS5518710A (en) Positive and negative follow-up power circuit
JPS6444861A (en) Electric current detector
JPS57182120A (en) Photocoupler device
JPS5724123A (en) Reset circuit
JPS5765926A (en) Output controlling circuit