JPS55156410A - Signal separating circuit - Google Patents

Signal separating circuit

Info

Publication number
JPS55156410A
JPS55156410A JP6388379A JP6388379A JPS55156410A JP S55156410 A JPS55156410 A JP S55156410A JP 6388379 A JP6388379 A JP 6388379A JP 6388379 A JP6388379 A JP 6388379A JP S55156410 A JPS55156410 A JP S55156410A
Authority
JP
Japan
Prior art keywords
voltage
amplifier
signal
positive
difference
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
JP6388379A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kimura
Hiromichi Tanaka
Takao Arai
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6388379A priority Critical patent/JPS55156410A/en
Publication of JPS55156410A publication Critical patent/JPS55156410A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control

Abstract

PURPOSE:To separate a synchronizing signal correctly by detecting the maximum and minimum of a signal and by using the difference voltage of this detected voltage as an AGC voltage for a signal amplifier. CONSTITUTION:A video signal applied to input terminal 20 is amplified by amplifier A and positive and negative peaks are detected by peak detecting circuit B. The positive peak voltage is inverted and amplified by OP amplifier 40 and the negative peak voltage is added by OP amplifier 41 to obtain a difference between the positive and negative peak voltage. This difference voltage is fed back to the initial stage of amplifier A for AGC. Consequently, even when a video signal differing in data contents is input, the reference potential of comparator 26 is set to a voltage depending upon the constant voltage dividing ratio of signal amplitude all the time and signal separation comes into effect with precision.
JP6388379A 1979-05-25 1979-05-25 Signal separating circuit Pending JPS55156410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6388379A JPS55156410A (en) 1979-05-25 1979-05-25 Signal separating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6388379A JPS55156410A (en) 1979-05-25 1979-05-25 Signal separating circuit

Publications (1)

Publication Number Publication Date
JPS55156410A true JPS55156410A (en) 1980-12-05

Family

ID=13242123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6388379A Pending JPS55156410A (en) 1979-05-25 1979-05-25 Signal separating circuit

Country Status (1)

Country Link
JP (1) JPS55156410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619089A (en) * 1984-06-04 1986-01-16 フランス国 Synchronizing extraction process for broadcasting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619089A (en) * 1984-06-04 1986-01-16 フランス国 Synchronizing extraction process for broadcasting system
JPH0342038B2 (en) * 1984-06-04 1991-06-25

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