JPS62139018A - Current limiting circuit - Google Patents

Current limiting circuit

Info

Publication number
JPS62139018A
JPS62139018A JP28136885A JP28136885A JPS62139018A JP S62139018 A JPS62139018 A JP S62139018A JP 28136885 A JP28136885 A JP 28136885A JP 28136885 A JP28136885 A JP 28136885A JP S62139018 A JPS62139018 A JP S62139018A
Authority
JP
Japan
Prior art keywords
power supply
collector
current
limiting circuit
current limiting
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
JP28136885A
Other languages
Japanese (ja)
Inventor
Akio Kawada
Original Assignee
Matsushita Electric Ind 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 Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to JP28136885A priority Critical patent/JPS62139018A/en
Publication of JPS62139018A publication Critical patent/JPS62139018A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To limit the power consumption of a power supply transistor and to facilitate the easy protection of a current limiting circuit, by detecting the collector-emitter voltage of the power supply transistor together with the collector current.
CONSTITUTION: A Zener diode D is turned on and a current IZ flows via a resistance r1, the diode D and a resistance r2 when the load impedance is reduced and at the same time the collector-emitter voltage VCE of a power supply transistor TR1 is higher than the forward voltage VZ of the diode D. Thus the collector current IC of the TR1 is reduced in response to the power supply IZ.
COPYRIGHT: (C)1987,JPO&Japio
JP28136885A 1985-12-13 1985-12-13 Current limiting circuit Pending JPS62139018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28136885A JPS62139018A (en) 1985-12-13 1985-12-13 Current limiting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28136885A JPS62139018A (en) 1985-12-13 1985-12-13 Current limiting circuit

Publications (1)

Publication Number Publication Date
JPS62139018A true JPS62139018A (en) 1987-06-22

Family

ID=17638144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28136885A Pending JPS62139018A (en) 1985-12-13 1985-12-13 Current limiting circuit

Country Status (1)

Country Link
JP (1) JPS62139018A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1265347A3 (en) * 2001-06-08 2005-12-28 Grundfos A/S Bootstrap voltage supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1265347A3 (en) * 2001-06-08 2005-12-28 Grundfos A/S Bootstrap voltage supply

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