FR2237358A1 - Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier - Google Patents

Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier

Info

Publication number
FR2237358A1
FR2237358A1 FR7325839A FR7325839A FR2237358A1 FR 2237358 A1 FR2237358 A1 FR 2237358A1 FR 7325839 A FR7325839 A FR 7325839A FR 7325839 A FR7325839 A FR 7325839A FR 2237358 A1 FR2237358 A1 FR 2237358A1
Authority
FR
France
Prior art keywords
demodulator
differential amplifier
video disc
modulated carrier
carrier oscillation
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.)
Granted
Application number
FR7325839A
Other languages
French (fr)
Other versions
FR2237358B1 (en
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7325839A priority Critical patent/FR2237358A1/en
Priority to IT2499874A priority patent/IT1017033B/en
Priority to DE19742433370 priority patent/DE2433370A1/en
Priority to JP49080698A priority patent/JPS5040063A/ja
Publication of FR2237358A1 publication Critical patent/FR2237358A1/en
Application granted granted Critical
Publication of FR2237358B1 publication Critical patent/FR2237358B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/931—Regeneration of the television signal or of selected parts thereof for restoring the level of the reproduced signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
    • H03K5/082—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/94—Signal drop-out compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Television Signal Processing For Recording (AREA)
  • Manipulation Of Pulses (AREA)
  • Dc Digital Transmission (AREA)

Abstract

A demodulator of an angularly modulated carrier oscillation for use as optical reader of the record on a video disc can filter the signal produced without interference with the upper frequency of the modulation signal band. The signal, applied to the terminal of the differential amplifier is generated by shifting a signal in a delay line by a fixed amount; the latter is so designed that the zero passages can be defined more accurately. This is achieved by connecting the negative input by a connection to the delay line input, and the output of the delay line to the positive input.
FR7325839A 1973-07-13 1973-07-13 Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier Granted FR2237358A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7325839A FR2237358A1 (en) 1973-07-13 1973-07-13 Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier
IT2499874A IT1017033B (en) 1973-07-13 1974-07-11 DEVICE FOR THE DEMODULATION OF AN ANGOLARMEN T MODULATED CARRIER WAVE AND ITS APPLICATION TO THE OPTICAL READER AND AN INFORMATION SUPPORT
DE19742433370 DE2433370A1 (en) 1973-07-13 1974-07-11 ARRANGEMENT FOR DEMODULATING AN ANGLE-MODULATED CARRIER VIBRATION AND USE OF THIS ARRANGEMENT FOR OPTICAL READING OF A RECORDING MEDIA
JP49080698A JPS5040063A (en) 1973-07-13 1974-07-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7325839A FR2237358A1 (en) 1973-07-13 1973-07-13 Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier

Publications (2)

Publication Number Publication Date
FR2237358A1 true FR2237358A1 (en) 1975-02-07
FR2237358B1 FR2237358B1 (en) 1976-04-30

Family

ID=9122575

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7325839A Granted FR2237358A1 (en) 1973-07-13 1973-07-13 Angularly modulated carrier oscillation demodulator - for video disc reading involves using limiter differential amplifier

Country Status (4)

Country Link
JP (1) JPS5040063A (en)
DE (1) DE2433370A1 (en)
FR (1) FR2237358A1 (en)
IT (1) IT1017033B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245886A2 (en) * 1986-04-11 1987-11-19 Philips Patentverwaltung GmbH Circuit arrangement for a picture-reproducing device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN148014B (en) * 1977-02-07 1980-09-20 Kentredder Ltd
JPS5856205A (en) * 1981-09-28 1983-04-02 Keio Giken Kogyo Kk Recorder and reproducer of digital data
JPS58209884A (en) * 1982-06-01 1983-12-06 松下電器産業株式会社 Heat sensitive heater wire
JPS5962251A (en) * 1982-10-01 1984-04-09 Hitachi Ltd Frequency separating system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069637A (en) * 1961-07-31 1962-12-18 Jr Ralph M Seeley Electronic signal seeking means having tuning reactance automatically controlled by difference between concurrent and delayed detector output

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069637A (en) * 1961-07-31 1962-12-18 Jr Ralph M Seeley Electronic signal seeking means having tuning reactance automatically controlled by difference between concurrent and delayed detector output

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245886A2 (en) * 1986-04-11 1987-11-19 Philips Patentverwaltung GmbH Circuit arrangement for a picture-reproducing device
EP0245886A3 (en) * 1986-04-11 1989-07-26 Philips Patentverwaltung Gmbh Circuit arrangement for a picture-reproducing device

Also Published As

Publication number Publication date
FR2237358B1 (en) 1976-04-30
JPS5040063A (en) 1975-04-12
DE2433370A1 (en) 1975-02-20
IT1017033B (en) 1977-07-20

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Legal Events

Date Code Title Description
ST Notification of lapse