JPS55149854A - Current detecting circuit for parallel-operated transistor circuit - Google Patents

Current detecting circuit for parallel-operated transistor circuit

Info

Publication number
JPS55149854A
JPS55149854A JP4068679A JP4068679A JPS55149854A JP S55149854 A JPS55149854 A JP S55149854A JP 4068679 A JP4068679 A JP 4068679A JP 4068679 A JP4068679 A JP 4068679A JP S55149854 A JPS55149854 A JP S55149854A
Authority
JP
Japan
Prior art keywords
resistors
current
common node
parallel
circuit
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
JP4068679A
Other languages
Japanese (ja)
Inventor
Hideo Yokoyama
Fumiaki Ihara
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 Telecom Networks Ltd
Original Assignee
Fujitsu Telecom Networks 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 Telecom Networks Ltd filed Critical Fujitsu Telecom Networks Ltd
Priority to JP4068679A priority Critical patent/JPS55149854A/en
Publication of JPS55149854A publication Critical patent/JPS55149854A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect an electric current at a high accuracy with a small loss, by connecting resistors to current-balance emitter resistors, and using a common node of the former resistors and a common node of the latter resistors as detecting terminals.
CONSTITUTION: Resistors Ra1WRan are connected to current-balance emitter resistors Rb1WRbn in parallel-connected transistors Q1WQn. A common node of the resistors Ra1WRan and a common node of the resistors Rb1WRbn are used as current detecting terminals, by which voltages E are measured. A load current I can be determined at a high accuracy on the basis of the voltages E. The resistors Ra1WRan may have a value sufficiently larger than that of the resistors Rb1WRbn so that a power loss is never increased.
COPYRIGHT: (C)1980,JPO&Japio
JP4068679A 1979-04-04 1979-04-04 Current detecting circuit for parallel-operated transistor circuit Pending JPS55149854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4068679A JPS55149854A (en) 1979-04-04 1979-04-04 Current detecting circuit for parallel-operated transistor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4068679A JPS55149854A (en) 1979-04-04 1979-04-04 Current detecting circuit for parallel-operated transistor circuit

Publications (1)

Publication Number Publication Date
JPS55149854A true JPS55149854A (en) 1980-11-21

Family

ID=12587420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4068679A Pending JPS55149854A (en) 1979-04-04 1979-04-04 Current detecting circuit for parallel-operated transistor circuit

Country Status (1)

Country Link
JP (1) JPS55149854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001035519A1 (en) * 1999-11-09 2001-05-17 Koninklijke Philips Electronics N.V. Dc-dc converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001035519A1 (en) * 1999-11-09 2001-05-17 Koninklijke Philips Electronics N.V. Dc-dc converter
US6285171B1 (en) 1999-11-09 2001-09-04 U.S. Philips Corporation DC-DC converter

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