JPS57188163A - Signal discriminator - Google Patents

Signal discriminator

Info

Publication number
JPS57188163A
JPS57188163A JP7213381A JP7213381A JPS57188163A JP S57188163 A JPS57188163 A JP S57188163A JP 7213381 A JP7213381 A JP 7213381A JP 7213381 A JP7213381 A JP 7213381A JP S57188163 A JPS57188163 A JP S57188163A
Authority
JP
Japan
Prior art keywords
circuit
voltage
control
signal
amplifying
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
JP7213381A
Other languages
Japanese (ja)
Inventor
Katsushi Yoshihara
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 JP7213381A priority Critical patent/JPS57188163A/en
Publication of JPS57188163A publication Critical patent/JPS57188163A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/062—Setting decision thresholds using feedforward techniques only

Abstract

PURPOSE:To obain an optimum discrimination level for all the ranges of inputs C/N, by amplifying an automatic gain control voltage of an AGC amplifying circuit at a prescribed voltage amplifier and applying the signal to a comparison discriminating circuit through a voltage limit circuit. CONSTITUTION:An input signal including noise passes through an AGC amplifying circuit 1, a narrow band pass filter circuit 3, and a detection circuit 4 and is inputted to a comparison discrimination circuit 5. An AGC voltage control circuit 2 generates a signal to control the circuit 1 and the control signal is branched and inputted to a voltage amplifying circuit 7. The slipe and initial value of the input and output characteristics of the circuit 7 are determined with the ratio of a resistor 10 to a resistor 8 and a reference voltage to the circuit 7, and the output of the circuit 7 passes through a voltage control circuit 13 and reduced to the reference input to the circuit 5.
JP7213381A 1981-05-15 1981-05-15 Signal discriminator Pending JPS57188163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7213381A JPS57188163A (en) 1981-05-15 1981-05-15 Signal discriminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7213381A JPS57188163A (en) 1981-05-15 1981-05-15 Signal discriminator

Publications (1)

Publication Number Publication Date
JPS57188163A true JPS57188163A (en) 1982-11-19

Family

ID=13480482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7213381A Pending JPS57188163A (en) 1981-05-15 1981-05-15 Signal discriminator

Country Status (1)

Country Link
JP (1) JPS57188163A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01216616A (en) * 1988-02-24 1989-08-30 Matsushita Electric Ind Co Ltd Pulse demodulation circuit
JPH06136605A (en) * 1992-10-26 1994-05-17 Taiichiro Iwakura Outfit for protection against cold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01216616A (en) * 1988-02-24 1989-08-30 Matsushita Electric Ind Co Ltd Pulse demodulation circuit
JPH06136605A (en) * 1992-10-26 1994-05-17 Taiichiro Iwakura Outfit for protection against cold

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