GB1259227A - - Google Patents

Info

Publication number
GB1259227A
GB1259227A GB3999670A GB1259227DA GB1259227A GB 1259227 A GB1259227 A GB 1259227A GB 3999670 A GB3999670 A GB 3999670A GB 1259227D A GB1259227D A GB 1259227DA GB 1259227 A GB1259227 A GB 1259227A
Authority
GB
United Kingdom
Prior art keywords
burst
chrominance
current
amplifiers
colour television
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
GB3999670A
Inventor
R E Gray
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn Electrical Industries 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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Publication of GB1259227A publication Critical patent/GB1259227A/en
Expired 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)
  • Color Television Systems (AREA)

Abstract

1,259,227. Colour television. THORN ELECTRICAL INDUSTRIES Ltd. 19 Aug., 1970, No. 39996/70. Heading H4F. The phase-reference signals in a PAL system colour television receiver are separated from the chrominance information signals and used for AGC of the composite chrominance amplifier by using two differential amplifiers A1, A2, A3 and A3, A4, A5. A burst gating signal VG controls the switching of current I 3 between amplifiers A4 and A5 providing burst and chrominance outputs respectively, and the burst signal amplitude is itself used to control over VX the current I3 in one limb of the differential amplifier A1, A2, A3. Fig. 3 (not shown) illustrates a realization of the circuit using transistors which is stated to be suitable for thick film or integrated circuit fabrication.
GB3999670A 1970-08-19 1970-08-19 Expired GB1259227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3999670 1970-08-19

Publications (1)

Publication Number Publication Date
GB1259227A true GB1259227A (en) 1972-01-05

Family

ID=10412626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3999670A Expired GB1259227A (en) 1970-08-19 1970-08-19

Country Status (6)

Country Link
AU (1) AU449015B2 (en)
DE (1) DE2141635B2 (en)
GB (1) GB1259227A (en)
NL (1) NL7111403A (en)
SE (1) SE377259B (en)
ZA (1) ZA715328B (en)

Also Published As

Publication number Publication date
NL7111403A (en) 1972-02-22
DE2141635A1 (en) 1972-02-24
AU3245871A (en) 1973-02-22
ZA715328B (en) 1972-04-26
SE377259B (en) 1975-06-23
DE2141635B2 (en) 1975-03-06
AU449015B2 (en) 1974-05-30

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee