GB803976A - Improvements in or relating to television receivers - Google Patents

Improvements in or relating to television receivers

Info

Publication number
GB803976A
GB803976A GB388956A GB388956A GB803976A GB 803976 A GB803976 A GB 803976A GB 388956 A GB388956 A GB 388956A GB 388956 A GB388956 A GB 388956A GB 803976 A GB803976 A GB 803976A
Authority
GB
United Kingdom
Prior art keywords
sound
circuit
valve
tuned
vision
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
GB388956A
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.)
HENRI THOMAS PICHAL
EK Cole Ltd
Original Assignee
HENRI THOMAS PICHAL
EK Cole 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 HENRI THOMAS PICHAL, EK Cole Ltd filed Critical HENRI THOMAS PICHAL
Priority to GB388956A priority Critical patent/GB803976A/en
Publication of GB803976A publication Critical patent/GB803976A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

803,976. Multiplex radio signalling. COLE, Ltd., E. K., and PICHAL, H. T. Feb. 7, 1957 [Feb. 8, 1956], No. 3889/56. Class 40 (5). In a superheterodyne television receiver, to prevent interference between sound and vision I.F. signals, a first circuit L3, C3 tuned to the sound I.F. is coupled to a circuit L2 tuned to the vision I.F., and a third circuit L4, C4 tuned to the sound I.F. is coupled to the input circuit of a sound I.F. amplifier valve V3. A small capacitive coupling C, between L2 and L4, feeds into the vision I.F. amplifier valve V2 a voltage at the sound I.F. equal and in opposite phase to that normally at the grid of V2, thereby neutralizing the sound I.F. signals in the input of valve V2. In a modification, condenser C is connected between the control grid of valve V2 and a tapping in the first circuit L3, C3, one end of coil L3 being grounded.
GB388956A 1956-02-08 1956-02-08 Improvements in or relating to television receivers Expired GB803976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB388956A GB803976A (en) 1956-02-08 1956-02-08 Improvements in or relating to television receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB388956A GB803976A (en) 1956-02-08 1956-02-08 Improvements in or relating to television receivers

Publications (1)

Publication Number Publication Date
GB803976A true GB803976A (en) 1958-11-05

Family

ID=9766777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB388956A Expired GB803976A (en) 1956-02-08 1956-02-08 Improvements in or relating to television receivers

Country Status (1)

Country Link
GB (1) GB803976A (en)

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