GB785820A - Chrominance circuit for colour television receiver - Google Patents

Chrominance circuit for colour television receiver

Info

Publication number
GB785820A
GB785820A GB30892/55A GB3089255A GB785820A GB 785820 A GB785820 A GB 785820A GB 30892/55 A GB30892/55 A GB 30892/55A GB 3089255 A GB3089255 A GB 3089255A GB 785820 A GB785820 A GB 785820A
Authority
GB
United Kingdom
Prior art keywords
amplifier
response
chrominance
pass
circuit
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
GB30892/55A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB785820A publication Critical patent/GB785820A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/146—Decoding means therefor

Landscapes

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

Abstract

785,820. Radio receiving apparatus. STANDARD TELEPHONES & CABLES, Ltd. Oct. 28, 1955 [Nov. 29, 1954], No. 30892/55. Class 40 (5). In a chrominance circuit comprising a chroma amplifier 3, Fig. I, demodulator 4 and amplifier 6, the amplifier is given a frequency response which is the complement of the response of band-pass circuit in the chroma amplifier to provide a substantially linear response. The chrominance signals applied to amplifier 9, Fig. 2, pass through band-pass coupling 10 giving at point A a response as in Fig. 3. The signals are fed from potentiometer 16 to demodulators 20, 23 and to the colour burst gate 15 which in turn supplies signals to the demodulators. The output from discharge tube 20 is fed through a carrier-filtering and peaking network 25 to the amplifier 29 where the response is as curve B. Since the amplifier 29 has a characteristic C the resulting output curve D is substantially linear.
GB30892/55A 1954-11-29 1955-10-28 Chrominance circuit for colour television receiver Expired GB785820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US785820XA 1954-11-29 1954-11-29

Publications (1)

Publication Number Publication Date
GB785820A true GB785820A (en) 1957-11-06

Family

ID=22144968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30892/55A Expired GB785820A (en) 1954-11-29 1955-10-28 Chrominance circuit for colour television receiver

Country Status (1)

Country Link
GB (1) GB785820A (en)

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