JPS6144698U - Light emitting diode drive circuit - Google Patents

Light emitting diode drive circuit

Info

Publication number
JPS6144698U
JPS6144698U JP12889084U JP12889084U JPS6144698U JP S6144698 U JPS6144698 U JP S6144698U JP 12889084 U JP12889084 U JP 12889084U JP 12889084 U JP12889084 U JP 12889084U JP S6144698 U JPS6144698 U JP S6144698U
Authority
JP
Japan
Prior art keywords
light emitting
emitting diode
resistor
drive circuit
diode drive
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
JP12889084U
Other languages
Japanese (ja)
Other versions
JPH0540550Y2 (en
Inventor
正男 長島
健次 前川
Original Assignee
ソニー株式会社
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 ソニー株式会社 filed Critical ソニー株式会社
Priority to JP12889084U priority Critical patent/JPS6144698U/en
Publication of JPS6144698U publication Critical patent/JPS6144698U/en
Application granted granted Critical
Publication of JPH0540550Y2 publication Critical patent/JPH0540550Y2/ja
Granted legal-status Critical Current

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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図は本考案に斯かる発光ダイオード駆動回一路の一
例の基本構成を示す構成図、第２図は第１図に示される
基本構成を具体化する回路構成の一例を示す構成図、第
３図及び第４図は発光ダイオードの一般的特性の説明に
供される特性図である。 図中、１は演算増幅器、２，３及び４は夫々第１、第２
及び第３の抵抗、５は可変電圧源、６及−び７は発光ダ
イオードである。FIG. 1 is a block diagram showing the basic structure of an example of a light emitting diode drive circuit according to the present invention, FIG. 2 is a block diagram showing an example of a circuit structure embodying the basic structure shown in FIG. 3 and 4 are characteristic diagrams for explaining general characteristics of light emitting diodes. In the figure, 1 is an operational amplifier, 2, 3, and 4 are first and second amplifiers, respectively.
and a third resistor, 5 is a variable voltage source, and 6 and 7 are light emitting diodes.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 負入力端子と出力端子との間に比較的大なる抵抗値を有
する第１の抵抗が接続されるとともにミ上記負入力端子
に比較的大なる抵抗値を有する第２の抵抗の一端が接続
された演算増幅器と、該演算増幅器の出力端子と上記第
２の抵抗の他端との間に接続された、上記第１及び第２
の抵抗の夫々の抵抗値に比して充分小なる抵抗値を有す
る第３の抵抗と、上記第２の抵抗の他端に接続された発
光ダイオードと、上記演算増幅器の正入力端子に接続さ
れた電圧供給部とを備えて構成された発光ダイオード駆
動回路。A first resistor having a relatively large resistance value is connected between the negative input terminal and the output terminal, and one end of a second resistor having a relatively large resistance value is connected to the negative input terminal. an operational amplifier; and the first and second resistors connected between the output terminal of the operational amplifier and the other end of the second resistor.
a third resistor having a resistance value sufficiently smaller than the respective resistance values of the resistors; a light emitting diode connected to the other end of the second resistor; and a light emitting diode connected to the positive input terminal of the operational amplifier. A light emitting diode drive circuit comprising: a voltage supply section;
JP12889084U 1984-08-25 1984-08-25 Light emitting diode drive circuit Granted JPS6144698U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12889084U JPS6144698U (en) 1984-08-25 1984-08-25 Light emitting diode drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12889084U JPS6144698U (en) 1984-08-25 1984-08-25 Light emitting diode drive circuit

Publications (2)

Publication Number Publication Date
JPS6144698U true JPS6144698U (en) 1986-03-25
JPH0540550Y2 JPH0540550Y2 (en) 1993-10-14

Family

ID=30687515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12889084U Granted JPS6144698U (en) 1984-08-25 1984-08-25 Light emitting diode drive circuit

Country Status (1)

Country Link
JP (1) JPS6144698U (en)

Also Published As

Publication number Publication date
JPH0540550Y2 (en) 1993-10-14

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