JPS55107282A - Luminous element driving circuit - Google Patents

Luminous element driving circuit

Info

Publication number
JPS55107282A
JPS55107282A JP1448979A JP1448979A JPS55107282A JP S55107282 A JPS55107282 A JP S55107282A JP 1448979 A JP1448979 A JP 1448979A JP 1448979 A JP1448979 A JP 1448979A JP S55107282 A JPS55107282 A JP S55107282A
Authority
JP
Japan
Prior art keywords
luminous element
circuit
resistor
coil
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
JP1448979A
Other languages
Japanese (ja)
Inventor
Toshio Takeshi
Risuke Shimodaira
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1448979A priority Critical patent/JPS55107282A/en
Publication of JPS55107282A publication Critical patent/JPS55107282A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant

Abstract

PURPOSE:To improve rise time and fall time of photooutput wave in intensity modulation time of a luminous element, by providing a spike generation circuit between a photo communication luminous element and a transistor which drives the element. CONSTITUTION:When connecting a luminous element 38 with a luminous element driving transistor 36 having an input terminal 31, a spike generation circuit 34 is interlaid between them. This circuit 34, which is composed of a resistor 32 having a required resistance value and a capacitor 33 and also a coil 37, connects the resistance 32 to the cpapacitor 33 in series, and a circuit in which the coil 37 and the element 38 are connected with each other in parallel is connected to the circuit 34. Further, the resistor 32 and the element 38 are grounded, a collector of the transistor 35 is connected to the junction point between the capacitor 33 and the coil 37, and voltage -VBB is impressed onto an emitter through the resistor 36. It is possible, in this manner, to largely improve rise time and fall time of photoinput wave of the element.
JP1448979A 1979-02-09 1979-02-09 Luminous element driving circuit Pending JPS55107282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1448979A JPS55107282A (en) 1979-02-09 1979-02-09 Luminous element driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1448979A JPS55107282A (en) 1979-02-09 1979-02-09 Luminous element driving circuit

Publications (1)

Publication Number Publication Date
JPS55107282A true JPS55107282A (en) 1980-08-16

Family

ID=11862455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1448979A Pending JPS55107282A (en) 1979-02-09 1979-02-09 Luminous element driving circuit

Country Status (1)

Country Link
JP (1) JPS55107282A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184673A2 (en) * 1984-11-07 1986-06-18 Sumitomo Electric Industries Limited Optical transmitter with driving circuit
JPH0629575A (en) * 1992-04-24 1994-02-04 Hughes Aircraft Co Driving current source of pseudoresonance diode
EP2988380A2 (en) 2014-08-22 2016-02-24 Kabushiki Kaisha TOPCON Light emitting device
EP2988379A2 (en) 2014-08-22 2016-02-24 Kabushiki Kaisha TOPCON Method for adjusting light emitting device
US10277006B2 (en) 2015-04-30 2019-04-30 Topcon Corporation Light-emitting device and distance measurement device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184673A2 (en) * 1984-11-07 1986-06-18 Sumitomo Electric Industries Limited Optical transmitter with driving circuit
JPH0629575A (en) * 1992-04-24 1994-02-04 Hughes Aircraft Co Driving current source of pseudoresonance diode
EP2988380A2 (en) 2014-08-22 2016-02-24 Kabushiki Kaisha TOPCON Light emitting device
EP2988379A2 (en) 2014-08-22 2016-02-24 Kabushiki Kaisha TOPCON Method for adjusting light emitting device
KR20160023583A (en) * 2014-08-22 2016-03-03 가부시키가이샤 토프콘 Method for adjusting light emitting apparatus
CN105392244A (en) * 2014-08-22 2016-03-09 株式会社拓普康 method for adjusting light emitting device
EP2988379A3 (en) * 2014-08-22 2016-03-09 Kabushiki Kaisha TOPCON Method for adjusting light emitting device
EP2988380A3 (en) * 2014-08-22 2016-03-09 Kabushiki Kaisha TOPCON Light emitting device
JP2016046375A (en) * 2014-08-22 2016-04-04 株式会社トプコン Method for adjusting light-emitting device
US9397475B2 (en) 2014-08-22 2016-07-19 Kabushiki Kaisha Topcon Method for adjusting light emitting device
US9985415B2 (en) 2014-08-22 2018-05-29 Kabushiki Kaisha Topcon Light emitting device
US10277006B2 (en) 2015-04-30 2019-04-30 Topcon Corporation Light-emitting device and distance measurement device

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