FR2383565A1 - Quadrature signal generation for TV colour decoder - is performed by timing circuit at oscillator output and applies signals to demodulators - Google Patents

Quadrature signal generation for TV colour decoder - is performed by timing circuit at oscillator output and applies signals to demodulators

Info

Publication number
FR2383565A1
FR2383565A1 FR7707146A FR7707146A FR2383565A1 FR 2383565 A1 FR2383565 A1 FR 2383565A1 FR 7707146 A FR7707146 A FR 7707146A FR 7707146 A FR7707146 A FR 7707146A FR 2383565 A1 FR2383565 A1 FR 2383565A1
Authority
FR
France
Prior art keywords
signal
demodulators
timing circuit
signal generation
quadrature
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
FR7707146A
Other languages
French (fr)
Other versions
FR2383565B1 (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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority to FR7707146A priority Critical patent/FR2383565A1/en
Publication of FR2383565A1 publication Critical patent/FR2383565A1/en
Application granted granted Critical
Publication of FR2383565B1 publication Critical patent/FR2383565B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

A signal is quadrature with a reference signal is generated by an integrated circuit for use in PAL system colour TV decoding for the receiver. No manual controls are required for adjustment for compensation of temp. or ageing. A PAL TV system decoder (10) receives a chrominance reference signal (U) and a phase variable chrominance signal (V). The reference is applied to a crystal controlled sub-carrier oscillator (20) via a phase detector (26) to provide a quadrature output signal (38). This signal is applied to timing circuit (22) to produce an output (66) in quadrature with its input (66). These signals are then applied to colour demodulators (74, 78).
FR7707146A 1977-03-10 1977-03-10 Quadrature signal generation for TV colour decoder - is performed by timing circuit at oscillator output and applies signals to demodulators Granted FR2383565A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7707146A FR2383565A1 (en) 1977-03-10 1977-03-10 Quadrature signal generation for TV colour decoder - is performed by timing circuit at oscillator output and applies signals to demodulators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7707146A FR2383565A1 (en) 1977-03-10 1977-03-10 Quadrature signal generation for TV colour decoder - is performed by timing circuit at oscillator output and applies signals to demodulators

Publications (2)

Publication Number Publication Date
FR2383565A1 true FR2383565A1 (en) 1978-10-06
FR2383565B1 FR2383565B1 (en) 1983-06-24

Family

ID=9187899

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7707146A Granted FR2383565A1 (en) 1977-03-10 1977-03-10 Quadrature signal generation for TV colour decoder - is performed by timing circuit at oscillator output and applies signals to demodulators

Country Status (1)

Country Link
FR (1) FR2383565A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128745A1 (en) * 1971-03-09 1972-10-20 Victor Company Of Japan
GB1361578A (en) * 1971-11-16 1974-07-30 Sharp Kk Colour television

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128745A1 (en) * 1971-03-09 1972-10-20 Victor Company Of Japan
GB1361578A (en) * 1971-11-16 1974-07-30 Sharp Kk Colour television

Also Published As

Publication number Publication date
FR2383565B1 (en) 1983-06-24

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