JPS5739423A - Regulated power supply circuit - Google Patents

Regulated power supply circuit

Info

Publication number
JPS5739423A
JPS5739423A JP11310480A JP11310480A JPS5739423A JP S5739423 A JPS5739423 A JP S5739423A JP 11310480 A JP11310480 A JP 11310480A JP 11310480 A JP11310480 A JP 11310480A JP S5739423 A JPS5739423 A JP S5739423A
Authority
JP
Japan
Prior art keywords
current
output
load
constant
case
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
JP11310480A
Other languages
Japanese (ja)
Inventor
Chikayuki Okamoto
Isao Fukushima
Yoshinori Okada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11310480A priority Critical patent/JPS5739423A/en
Publication of JPS5739423A publication Critical patent/JPS5739423A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/18—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using Zener diodes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE:To save electric power, by controlling an inflow current to a voltage stabilizing element, being proportional to an output of a load current detecting circuit. CONSTITUTION:A load current signal detected by a load current detecting circuit 9 is shifted to DC by a level shifter 10, is amplified by an amplifier 14, and controls a current of a constant-current source transistor TR13 by a signal being proportional to this output signal. In this case, a TR11 and a TR12 are used for amplifying an output of the amplifier 14, and compensating a temperature of the TR13, respectively. In this constitution, in case when a current flowing to a load 6 is a little, as for an output TR3, a little current will do, as well, therefore, an output of the amplifier 14 for amplifying a signal of the load current detecting circuit 9 is made small, and a current of the constant-current source TR13 is reduced. In case when a load current is increased, a current of the constant-current TR13 is increased by its increased portion, a current of a Zener diode 4 and base voltage of the output TR3 are made constant, and also output voltage 5 is made constant, by which electric power in case of usual light load is reduced.
JP11310480A 1980-08-18 1980-08-18 Regulated power supply circuit Pending JPS5739423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11310480A JPS5739423A (en) 1980-08-18 1980-08-18 Regulated power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11310480A JPS5739423A (en) 1980-08-18 1980-08-18 Regulated power supply circuit

Publications (1)

Publication Number Publication Date
JPS5739423A true JPS5739423A (en) 1982-03-04

Family

ID=14603579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11310480A Pending JPS5739423A (en) 1980-08-18 1980-08-18 Regulated power supply circuit

Country Status (1)

Country Link
JP (1) JPS5739423A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01136560A (en) * 1987-11-19 1989-05-29 Tokyo Electric Co Ltd Dc power supply switching circuit
JPH0436615U (en) * 1990-07-25 1992-03-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01136560A (en) * 1987-11-19 1989-05-29 Tokyo Electric Co Ltd Dc power supply switching circuit
JPH0436615U (en) * 1990-07-25 1992-03-27

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