JPS5547520A - Constant current circuit - Google Patents

Constant current circuit

Info

Publication number
JPS5547520A
JPS5547520A JP12058078A JP12058078A JPS5547520A JP S5547520 A JPS5547520 A JP S5547520A JP 12058078 A JP12058078 A JP 12058078A JP 12058078 A JP12058078 A JP 12058078A JP S5547520 A JPS5547520 A JP S5547520A
Authority
JP
Japan
Prior art keywords
transistor
collector current
voltage
current
collector
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
JP12058078A
Other languages
Japanese (ja)
Inventor
Takashi Katayanagi
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.)
Meiji National Industrial Co Ltd
Original Assignee
Meiji National Industrial 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 Meiji National Industrial Co Ltd filed Critical Meiji National Industrial Co Ltd
Priority to JP12058078A priority Critical patent/JPS5547520A/en
Publication of JPS5547520A publication Critical patent/JPS5547520A/en
Pending legal-status Critical Current

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  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE: To make the output current substantially constant irrespective of the pulsation of the voltage by controlling the series transistor in which the resistance is connected between the emitter bases by the transistor which is turned ON at more than a predetermined value of the pulsating voltage.
CONSTITUTION: The pulsating voltage impressed between the input terminals 1, 2 becomes larger than a predetermined value, the period of ON of the transistor 3 is longer, the dropping time width of the collector current of the transistor 10 is lengthened, and the collector current is made substantially constant. When the pulsating voltage exceeds a predetermined limit and becomes larger, the dropping of the collector current becomes much larger, however, the dropping time width is not enlarged, so that the collector current is reduced. In order to correct this reduction, the resistance 12 is provided ans when the voltage between the collector emitters of the transistor 8 is high, the base current is supplied to the transistor 10.
COPYRIGHT: (C)1980,JPO&Japio
JP12058078A 1978-09-30 1978-09-30 Constant current circuit Pending JPS5547520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12058078A JPS5547520A (en) 1978-09-30 1978-09-30 Constant current circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12058078A JPS5547520A (en) 1978-09-30 1978-09-30 Constant current circuit

Publications (1)

Publication Number Publication Date
JPS5547520A true JPS5547520A (en) 1980-04-04

Family

ID=14789790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12058078A Pending JPS5547520A (en) 1978-09-30 1978-09-30 Constant current circuit

Country Status (1)

Country Link
JP (1) JPS5547520A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9909326B2 (en) 2010-02-25 2018-03-06 John Clement Preston Scaffolding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9909326B2 (en) 2010-02-25 2018-03-06 John Clement Preston Scaffolding

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