JPS56169972A - Synchronism detection type demodulator for tv modulation signal - Google Patents

Synchronism detection type demodulator for tv modulation signal

Info

Publication number
JPS56169972A
JPS56169972A JP7371880A JP7371880A JPS56169972A JP S56169972 A JPS56169972 A JP S56169972A JP 7371880 A JP7371880 A JP 7371880A JP 7371880 A JP7371880 A JP 7371880A JP S56169972 A JPS56169972 A JP S56169972A
Authority
JP
Japan
Prior art keywords
filter
saw2
saw1
filters
same
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
JP7371880A
Other languages
Japanese (ja)
Inventor
Kenji Koro
Nobuyoshi Sakamoto
Nobutada Takahashi
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.)
Oki Electric Industry Co Ltd
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Oki Electric Industry Co Ltd
Japan Broadcasting 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 Nippon Hoso Kyokai NHK, Oki Electric Industry Co Ltd, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP7371880A priority Critical patent/JPS56169972A/en
Publication of JPS56169972A publication Critical patent/JPS56169972A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To accomplish an excellent demodulating characteristic against variance in input frequency and temperature, by inserting a SAW filter having the same delay time and temperature characteristics to a Nyquist filter side and a limiter circuit side respectively. CONSTITUTION:An input signal from an input terminal IN is amplified to a specified level at an intermediate frequency amplifier AMP and distributed at a hybrid HYB. One signal distributed is fed to a video detection circuit DET via a Nyquist filter SAW1 by a SAW filter. Further, another signal is picked up for a video carrier at a limiter LIM through a video carrying filter FvBPF, and this is fed to the circuit DET via a band pass filter SAW2 consisting of SAW filters. In this case, by manufacturing the filters SAW1 and SAW2 on the same board, the temperature characteristics are entirely the same and negligible. Further, the filters SAW1 and SAW2 are designed to have the same delay time easily.
JP7371880A 1980-06-03 1980-06-03 Synchronism detection type demodulator for tv modulation signal Pending JPS56169972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7371880A JPS56169972A (en) 1980-06-03 1980-06-03 Synchronism detection type demodulator for tv modulation signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7371880A JPS56169972A (en) 1980-06-03 1980-06-03 Synchronism detection type demodulator for tv modulation signal

Publications (1)

Publication Number Publication Date
JPS56169972A true JPS56169972A (en) 1981-12-26

Family

ID=13526276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7371880A Pending JPS56169972A (en) 1980-06-03 1980-06-03 Synchronism detection type demodulator for tv modulation signal

Country Status (1)

Country Link
JP (1) JPS56169972A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656187A1 (en) * 1989-12-14 1991-06-21 Thomson Lgt Method and device for demodulating an amplitude-modulated television signal, with vestigial sideband

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287930A (en) * 1976-01-19 1977-07-22 Hitachi Ltd Tv receiver
JPS53117364A (en) * 1977-03-23 1978-10-13 Matsushita Electric Ind Co Ltd Synchronizing demodulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5287930A (en) * 1976-01-19 1977-07-22 Hitachi Ltd Tv receiver
JPS53117364A (en) * 1977-03-23 1978-10-13 Matsushita Electric Ind Co Ltd Synchronizing demodulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656187A1 (en) * 1989-12-14 1991-06-21 Thomson Lgt Method and device for demodulating an amplitude-modulated television signal, with vestigial sideband

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