JPS5871814U - constant current power supply circuit - Google Patents

constant current power supply circuit

Info

Publication number
JPS5871814U
JPS5871814U JP16505581U JP16505581U JPS5871814U JP S5871814 U JPS5871814 U JP S5871814U JP 16505581 U JP16505581 U JP 16505581U JP 16505581 U JP16505581 U JP 16505581U JP S5871814 U JPS5871814 U JP S5871814U
Authority
JP
Japan
Prior art keywords
power supply
constant current
current power
supply circuit
transistor
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
JP16505581U
Other languages
Japanese (ja)
Inventor
三瓶　文雄
Original Assignee
富士通株式会社
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 富士通株式会社 filed Critical 富士通株式会社
Priority to JP16505581U priority Critical patent/JPS5871814U/en
Publication of JPS5871814U publication Critical patent/JPS5871814U/en
Pending legal-status Critical Current

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  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図および第２図は従来の定電流電源回路図例、第３
図は本考案め実施例による定電流電源回路図を示す。 図においてＴはＴＴＬ−ＩＣ回路、ＲＬは負荷、ＦＳは
ＦＥＴスイッチ、ＺＤはツェナーダイオード、ＰＩはフ
ォトアイソレータ、Ｄはダイオード、ＯＰはオペアンプ
を示す。　　　　′Figures 1 and 2 are examples of conventional constant current power supply circuit diagrams;
The figure shows a constant current power supply circuit diagram according to an embodiment of the present invention. In the figure, T is a TTL-IC circuit, RL is a load, FS is a FET switch, ZD is a Zener diode, PI is a photo isolator, D is a diode, and OP is an operational amplifier. ′

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] アースとトランジスタのコレクタ間に負荷が接続され、
電源と該トランジスタのエミッタ間に抵抗を、また電源
と該トランジスタのベース間にツェナーダイオードとダ
イオードの直列回路を接続し、該トランジスタのベース
をフォトアイソレータでドライブすることを特徴とする
定電流電源回路。A load is connected between ground and the collector of the transistor,
A constant current power supply circuit characterized in that a resistor is connected between a power supply and the emitter of the transistor, a series circuit of a Zener diode and a diode is connected between the power supply and the base of the transistor, and the base of the transistor is driven by a photo-isolator. .
JP16505581U 1981-11-05 1981-11-05 constant current power supply circuit Pending JPS5871814U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16505581U JPS5871814U (en) 1981-11-05 1981-11-05 constant current power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16505581U JPS5871814U (en) 1981-11-05 1981-11-05 constant current power supply circuit

Publications (1)

Publication Number Publication Date
JPS5871814U true JPS5871814U (en) 1983-05-16

Family

ID=29957264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16505581U Pending JPS5871814U (en) 1981-11-05 1981-11-05 constant current power supply circuit

Country Status (1)

Country Link
JP (1) JPS5871814U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01120608A (en) * 1987-11-05 1989-05-12 Honda Motor Co Ltd Power driving circuit with current control function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249445A (en) * 1975-10-17 1977-04-20 Hitachi Ltd D.c. constant current source
JPS5318549B1 (en) * 1972-01-17 1978-06-15
JPS5635226A (en) * 1979-08-31 1981-04-07 Canon Inc Power supply control device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5318549B1 (en) * 1972-01-17 1978-06-15
JPS5249445A (en) * 1975-10-17 1977-04-20 Hitachi Ltd D.c. constant current source
JPS5635226A (en) * 1979-08-31 1981-04-07 Canon Inc Power supply control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01120608A (en) * 1987-11-05 1989-05-12 Honda Motor Co Ltd Power driving circuit with current control function

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