JPH0235831A - Light receiving/amplifying circuit - Google Patents

Light receiving/amplifying circuit

Info

Publication number
JPH0235831A
JPH0235831A JP63184498A JP18449888A JPH0235831A JP H0235831 A JPH0235831 A JP H0235831A JP 63184498 A JP63184498 A JP 63184498A JP 18449888 A JP18449888 A JP 18449888A JP H0235831 A JPH0235831 A JP H0235831A
Authority
JP
Japan
Prior art keywords
control
light input
signal
sub
turned
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
JP63184498A
Inventor
Shigeru Taguchi
Original Assignee
Nec Corp
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 filed Critical Nec Corp
Priority to JP63184498A priority Critical patent/JPH0235831A/en
Publication of JPH0235831A publication Critical patent/JPH0235831A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To sufficiently obtain the level difference between an subsignal and noise to be generated from a photoelectric converting element by making a voltage applied from a high voltage control circuit to the photoelectric converting element into a control voltage immediately before the light input is turned off by the control of a clock turning-off detecting circuit extracted from the output of a variable gain amplifier at the time of turning off the light input.
CONSTITUTION: When a light input signal IN is turned off, the voltage applied from a DC/DC converter 7 to an APD1 is made into the control voltage immediately before the light input is turned off, by the control of a clock turning-off detecting circuit 10 extracted by the output of a variable gain amplifier 3. Further, out of the output of variable gain amplifier 3, the sub-signal of a low frequency is detected through a low pass filter 8 with a sub-signal detecting circuit 9. For such a reason, the level difference between the sub-signal and the noise to generate from the photoelectric converting element such as APD.
COPYRIGHT: (C)1990,JPO&Japio
JP63184498A 1988-07-26 1988-07-26 Light receiving/amplifying circuit Pending JPH0235831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63184498A JPH0235831A (en) 1988-07-26 1988-07-26 Light receiving/amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63184498A JPH0235831A (en) 1988-07-26 1988-07-26 Light receiving/amplifying circuit

Publications (1)

Publication Number Publication Date
JPH0235831A true JPH0235831A (en) 1990-02-06

Family

ID=16154240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63184498A Pending JPH0235831A (en) 1988-07-26 1988-07-26 Light receiving/amplifying circuit

Country Status (1)

Country Link
JP (1) JPH0235831A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04131057U (en) * 1991-05-28 1992-12-01
JPH05122153A (en) * 1991-10-25 1993-05-18 Nec Corp Photodetecting circuit
US7420990B2 (en) 2004-01-28 2008-09-02 Rambus Inc. Adaptive-allocation of I/O bandwidth using a configurable interconnect topology
US7535958B2 (en) 2004-06-14 2009-05-19 Rambus, Inc. Hybrid wired and wireless chip-to-chip communications
CN103091568A (en) * 2013-01-21 2013-05-08 华中科技大学 Avalanche photodiode excessive noise factor measuring system
CN107137074A (en) * 2017-03-31 2017-09-08 浙江大学 Instrumentation amplifier applied to bio-electrical signals

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04131057U (en) * 1991-05-28 1992-12-01
JPH05122153A (en) * 1991-10-25 1993-05-18 Nec Corp Photodetecting circuit
US7420990B2 (en) 2004-01-28 2008-09-02 Rambus Inc. Adaptive-allocation of I/O bandwidth using a configurable interconnect topology
US7535958B2 (en) 2004-06-14 2009-05-19 Rambus, Inc. Hybrid wired and wireless chip-to-chip communications
CN103091568A (en) * 2013-01-21 2013-05-08 华中科技大学 Avalanche photodiode excessive noise factor measuring system
CN107137074A (en) * 2017-03-31 2017-09-08 浙江大学 Instrumentation amplifier applied to bio-electrical signals

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