JPS56134856A - Optical signal receiver - Google Patents

Optical signal receiver

Info

Publication number
JPS56134856A
JPS56134856A JP3779780A JP3779780A JPS56134856A JP S56134856 A JPS56134856 A JP S56134856A JP 3779780 A JP3779780 A JP 3779780A JP 3779780 A JP3779780 A JP 3779780A JP S56134856 A JPS56134856 A JP S56134856A
Authority
JP
Japan
Prior art keywords
reference voltage
output
adder
detectors
comparator
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
JP3779780A
Other languages
Japanese (ja)
Inventor
Sumio Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP3779780A priority Critical patent/JPS56134856A/en
Publication of JPS56134856A publication Critical patent/JPS56134856A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/695—Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control

Abstract

PURPOSE:To demodulate an electric signal correctly by detecting positive and negative envelopes of an electric signal obtained by receiving and converting a optical signal, by using a halved sum of those detection outputs as the reference voltage, and by comparing and detecting the electric signal. CONSTITUTION:A signal converted from light to electricity by photodetecting element 1 is amplified by amplifier 2. The output signal of amplifier 2 is supplied to detectors 7a and 7b for envelopes at the positive and negative voltage sides, and output voltages of detectors 7a and 7b are applied to adder 8 together with reference voltage VREF. The output of adder 8 is applied to input terminal 6 of comparator 4. Adder 8 outputs the sum of the half of the sum of the outputs of detectors 7a and 7b, and the reference voltage, and its output is used as the reference voltage of comparator 4. Thus, a detection error due to a transident phenomenon of the differentiating circuit composed of capacitor 3 and the input resistance of comparator 4 are compensated.
JP3779780A 1980-03-25 1980-03-25 Optical signal receiver Pending JPS56134856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3779780A JPS56134856A (en) 1980-03-25 1980-03-25 Optical signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3779780A JPS56134856A (en) 1980-03-25 1980-03-25 Optical signal receiver

Publications (1)

Publication Number Publication Date
JPS56134856A true JPS56134856A (en) 1981-10-21

Family

ID=12507483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3779780A Pending JPS56134856A (en) 1980-03-25 1980-03-25 Optical signal receiver

Country Status (1)

Country Link
JP (1) JPS56134856A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622628A (en) * 1993-06-29 1994-02-01 Iseki & Co Ltd Operating device of combine
JPH0711114U (en) * 1994-08-01 1995-02-21 井関農機株式会社 Combine operation machine frame
JP2011226978A (en) * 2010-04-22 2011-11-10 Toyota Central R&D Labs Inc Transmission and reception signal correlation detecting device and distance measuring device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622628A (en) * 1993-06-29 1994-02-01 Iseki & Co Ltd Operating device of combine
JPH0711114U (en) * 1994-08-01 1995-02-21 井関農機株式会社 Combine operation machine frame
JP2011226978A (en) * 2010-04-22 2011-11-10 Toyota Central R&D Labs Inc Transmission and reception signal correlation detecting device and distance measuring device

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