JPS54135549A - Light receiving circuit - Google Patents

Light receiving circuit

Info

Publication number
JPS54135549A
JPS54135549A JP4262778A JP4262778A JPS54135549A JP S54135549 A JPS54135549 A JP S54135549A JP 4262778 A JP4262778 A JP 4262778A JP 4262778 A JP4262778 A JP 4262778A JP S54135549 A JPS54135549 A JP S54135549A
Authority
JP
Japan
Prior art keywords
signal
amplifier
improvement
terminal
photo
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
JP4262778A
Other languages
Japanese (ja)
Inventor
Hiroshi Nakamura
Naomasa Hanano
Kazuo Iguchi
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 Ltd
Original Assignee
Fujitsu 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 Ltd filed Critical Fujitsu Ltd
Priority to JP4262778A priority Critical patent/JPS54135549A/en
Publication of JPS54135549A publication Critical patent/JPS54135549A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To achieve the improvement of S/N and the improvement of frequency characteristics simultaneously by feeding the signal voltage appearing at the load terminal of a photo diode converting the light signal received to electric signal in in- phase back to another terminal of the diode.
CONSTITUTION: The input part of an amplifier 13 is connected to the load terminal 12 of a photo diode (PD) 11 which receives the photo signal P and from its output part, the light-electricity conversion output V0 is obtained. The electric signal from the output part of the amplifier 13 is fed back to the power source side terminal 14 or the PD 11 and therefore if the same signal is applied alternately between both terminals of the PD 11, the impedance of the PD 11 becomes extremely large and the PD 11 may be regarded as an ideal current source, thus it turns out that the capacity of the PD is virtually negligible.
COPYRIGHT: (C)1979,JPO&Japio
JP4262778A 1978-04-13 1978-04-13 Light receiving circuit Pending JPS54135549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4262778A JPS54135549A (en) 1978-04-13 1978-04-13 Light receiving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4262778A JPS54135549A (en) 1978-04-13 1978-04-13 Light receiving circuit

Publications (1)

Publication Number Publication Date
JPS54135549A true JPS54135549A (en) 1979-10-20

Family

ID=12641243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4262778A Pending JPS54135549A (en) 1978-04-13 1978-04-13 Light receiving circuit

Country Status (1)

Country Link
JP (1) JPS54135549A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193508A (en) * 1985-02-21 1986-08-28 ザ・パーキン‐エルマー・コーポレイシヨン Preamplifier
JPS62100730U (en) * 1985-12-12 1987-06-26
JP2003083702A (en) * 2001-09-14 2003-03-19 Hara Doki Kk Method of manufacturing measuring tape

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4921049A (en) * 1972-04-17 1974-02-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4921049A (en) * 1972-04-17 1974-02-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193508A (en) * 1985-02-21 1986-08-28 ザ・パーキン‐エルマー・コーポレイシヨン Preamplifier
JPS62100730U (en) * 1985-12-12 1987-06-26
JP2003083702A (en) * 2001-09-14 2003-03-19 Hara Doki Kk Method of manufacturing measuring tape

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