JPS55110420A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS55110420A
JPS55110420A JP1821479A JP1821479A JPS55110420A JP S55110420 A JPS55110420 A JP S55110420A JP 1821479 A JP1821479 A JP 1821479A JP 1821479 A JP1821479 A JP 1821479A JP S55110420 A JPS55110420 A JP S55110420A
Authority
JP
Japan
Prior art keywords
circuit
test signal
fed
signal
input terminal
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
JP1821479A
Other languages
Japanese (ja)
Inventor
Yuzo Fukushi
Yoshiji Furuya
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 JP1821479A priority Critical patent/JPS55110420A/en
Publication of JPS55110420A publication Critical patent/JPS55110420A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H15/00—Transversal filters

Landscapes

  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To enable to prevent remarkable deterioration in video quality, by discriminating it as over-equalization if the test signal at the sampling point exceeds a given level range and outputting the main signal via the bypass circuit through driving the selection relay circuit with the test signal. CONSTITUTION:In the automatic equalizer providing the selection circuit 23 and the over-equalizing detection circuit 21, the circuit 23 consists of the branch circuit 25, bypass circuit 24 and selective relay circuit 26. Further, the main signal fed to the terminal 1 is divided into two at the circuit 25, one is fed to one input terminal of the relay circuit 26 via the circuit 24, and another is fed to the input terminal of the tapped delay line 3, the output of the adder 8 is fed to another input terminal of the circuit 26, and the main signal is outputted from the terminal 2. On the other hand, the circuit 21 always monitors the test signal superimposed during the vertical blanking period of color TV signal, and judges it as over-equalization if the test signal at the sampling point exceeds a given level range, the circuit 26 is driven with the test signal, the main signal is outputted via the circuit 24 to prevent remarkable video deterioration.
JP1821479A 1979-02-19 1979-02-19 Automatic equalizer Pending JPS55110420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1821479A JPS55110420A (en) 1979-02-19 1979-02-19 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1821479A JPS55110420A (en) 1979-02-19 1979-02-19 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS55110420A true JPS55110420A (en) 1980-08-25

Family

ID=11965389

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1821479A Pending JPS55110420A (en) 1979-02-19 1979-02-19 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS55110420A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57129015A (en) * 1981-02-04 1982-08-10 Nippon Telegr & Teleph Corp <Ntt> Automatic waveform equalizing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57129015A (en) * 1981-02-04 1982-08-10 Nippon Telegr & Teleph Corp <Ntt> Automatic waveform equalizing device

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