JPS5466444A - Power source control circuit - Google Patents

Power source control circuit

Info

Publication number
JPS5466444A
JPS5466444A JP13369877A JP13369877A JPS5466444A JP S5466444 A JPS5466444 A JP S5466444A JP 13369877 A JP13369877 A JP 13369877A JP 13369877 A JP13369877 A JP 13369877A JP S5466444 A JPS5466444 A JP S5466444A
Authority
JP
Japan
Prior art keywords
positive
power source
voltage
negative
load
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
JP13369877A
Other languages
Japanese (ja)
Other versions
JPS5650500B2 (en
Inventor
Toshiro Sakane
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13369877A priority Critical patent/JPS5466444A/en
Publication of JPS5466444A publication Critical patent/JPS5466444A/en
Publication of JPS5650500B2 publication Critical patent/JPS5650500B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Direct Current Feeding And Distribution (AREA)

Abstract

PURPOSE: To permit the use of FET connected to positive and negative power source in any order in a safety range by making the positive voltage applied to load almost zero while negative voltage to be applied does not reach the fixed value.
CONSTITUTION: In supplying voltage to a load such as FET requiring positive and negative power sources, voltage is supplied to the load 20 on the negative side through the negative power source regulator 2 from the negative power source 1. The output voltage of the negative power source regulator 2 is detected by a negative voltage detection circuit consisting of the Zener diode 3, the resistors 4 and 6, and the transistor 5. When negative voltage exists, positive voltage is supplied to the load 30 on the positive side through the positive power source regulator 8 from the positive power source 7. When no negative voltage exists, the supply of positive voltage to the load 30 on the positive side is controlled so as to stop in order to protect FET as load.
COPYRIGHT: (C)1979,JPO&Japio
JP13369877A 1977-11-08 1977-11-08 Power source control circuit Granted JPS5466444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13369877A JPS5466444A (en) 1977-11-08 1977-11-08 Power source control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13369877A JPS5466444A (en) 1977-11-08 1977-11-08 Power source control circuit

Publications (2)

Publication Number Publication Date
JPS5466444A true JPS5466444A (en) 1979-05-29
JPS5650500B2 JPS5650500B2 (en) 1981-11-30

Family

ID=15110784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13369877A Granted JPS5466444A (en) 1977-11-08 1977-11-08 Power source control circuit

Country Status (1)

Country Link
JP (1) JPS5466444A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216649A (en) * 1975-07-28 1977-02-08 Sharp Corp Power sequence circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216649A (en) * 1975-07-28 1977-02-08 Sharp Corp Power sequence circuit

Also Published As

Publication number Publication date
JPS5650500B2 (en) 1981-11-30

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