GB1471149A - Waveform generator - Google Patents

Waveform generator

Info

Publication number
GB1471149A
GB1471149A GB3640273A GB3640273A GB1471149A GB 1471149 A GB1471149 A GB 1471149A GB 3640273 A GB3640273 A GB 3640273A GB 3640273 A GB3640273 A GB 3640273A GB 1471149 A GB1471149 A GB 1471149A
Authority
GB
United Kingdom
Prior art keywords
signal
chip
intended
terminals
subcarrier frequency
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.)
Expired
Application number
GB3640273A
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.)
GRANADA TV RENTAL Ltd
Original Assignee
GRANADA TV RENTAL 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 GRANADA TV RENTAL Ltd filed Critical GRANADA TV RENTAL Ltd
Priority to GB3640273A priority Critical patent/GB1471149A/en
Priority to ZA00744702A priority patent/ZA744702B/en
Priority to AU71799/74A priority patent/AU7179974A/en
Publication of GB1471149A publication Critical patent/GB1471149A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
    • H04N17/045—Self-contained testing apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

1471149 Colour television GRANADA TV RENTAL Ltd 22 July 1974 [31 July 1973] 36402/73 Heading H4F A chrominance demodulation chip 8 is utilized to provide an amplitude modulated signal on a carrier having twice the frequency of an input oscillation, which may be an oscillation at subcarrier frequency. The subcarrier frequency oscillation is supplied to terminals 8 and 9 of the chip 8, these terminals being intended for the application of the B-Y sub-carrier reference input and the B-Y signal input respectively; the modulating video signal is supplied, together with an adjustable bias potential from potentiometer 19, to the chip terminal 13 which is intended for the application of the R-Y signal input; a signal at twice subcarrier frequency appears on chip terminal 7, which is intended for the B-Y signal output, and is connected to a tuned circuit 16, 18 tuned to twice subcarrier frequency, the tuned circuit being further connected to chip terminal 2 which is intended for the application of the R-Y sub-carrier reference input; the modulated output signal is derived from chip terminal 4 which is intended for the R-Y signal output. In an alternative arrangement the connections to chip terminals 4 and 7 are interchanged, as are the connections to chip terminals 2 and 8 and the connections to chip terminals 9 and 13. The modulating video signal may be derived from the waveform generator described in Specification 1,417,425, the modulated output signal being fed to a colour television receiver to produce a display free from moving beat patterns.
GB3640273A 1973-07-31 1973-07-31 Waveform generator Expired GB1471149A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3640273A GB1471149A (en) 1973-07-31 1973-07-31 Waveform generator
ZA00744702A ZA744702B (en) 1973-07-31 1974-07-23 Waveform generator
AU71799/74A AU7179974A (en) 1973-07-31 1974-07-30 Generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3640273A GB1471149A (en) 1973-07-31 1973-07-31 Waveform generator

Publications (1)

Publication Number Publication Date
GB1471149A true GB1471149A (en) 1977-04-21

Family

ID=10387810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3640273A Expired GB1471149A (en) 1973-07-31 1973-07-31 Waveform generator

Country Status (3)

Country Link
AU (1) AU7179974A (en)
GB (1) GB1471149A (en)
ZA (1) ZA744702B (en)

Also Published As

Publication number Publication date
ZA744702B (en) 1975-07-30
AU7179974A (en) 1976-02-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee