GB706065A - Improvements in or relating to sound rejection circuits for television receivers - Google Patents

Improvements in or relating to sound rejection circuits for television receivers

Info

Publication number
GB706065A
GB706065A GB151752A GB151752A GB706065A GB 706065 A GB706065 A GB 706065A GB 151752 A GB151752 A GB 151752A GB 151752 A GB151752 A GB 151752A GB 706065 A GB706065 A GB 706065A
Authority
GB
United Kingdom
Prior art keywords
circuit
sound
resonant
frequency
parallel
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
GB151752A
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.)
ALBERT JESSE BIGGS
General Electric Co PLC
Original Assignee
ALBERT JESSE BIGGS
General Electric Co 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 ALBERT JESSE BIGGS, General Electric Co PLC filed Critical ALBERT JESSE BIGGS
Priority to GB151752A priority Critical patent/GB706065A/en
Publication of GB706065A publication Critical patent/GB706065A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0138—Electrical filters or coupling circuits
    • H03H7/0146—Coupling circuits between two tubes, not otherwise provided for
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1783—Combined LC in series path

Abstract

706,065. Impedance networks. GENERAL ELECTRIC CO., Ltd., BIGGS, A. J., and RIBCHESTER, E. Jan. 15, 1953 [Jan. 18, 1952], No. 1517/52. Class 40 (8) A sound rejection circuit for a television receiver comprises a parallel resonant input circuit broadly resonant at the sound frequency, a parallel resonant output circuit broadly resonant within the desired pass band and a coupling circuit which has a high impedance at the sound frequency and a low impedance at that end of the pass band adjacent the sound frequency. The input circuit comprises an inductor 1 arranged to resonate with the interelectrode capacitance 4 of a tetrode amplifying valve 2. The output circuit comprises an inductor 6 arranged to resonate with the interelectrode capacitance 8 of a further tetrode 7. Both input and output circuits are damped by resistances 5, 9. The coupling circuit comprising a blocking capacitor 10 and a parallel resonant circuit 11 presents sharp parallel and series resonances respectively at the sound frequency and at an adjacent frequency within the pass band of the vision frequency. Depending upon the relative values of the sound and vision frequencies the coupling circuit may take various forms, e.g. a high valued capacitor in parallel with a series resonant circuit.
GB151752A 1952-01-18 1952-01-18 Improvements in or relating to sound rejection circuits for television receivers Expired GB706065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB151752A GB706065A (en) 1952-01-18 1952-01-18 Improvements in or relating to sound rejection circuits for television receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB151752A GB706065A (en) 1952-01-18 1952-01-18 Improvements in or relating to sound rejection circuits for television receivers

Publications (1)

Publication Number Publication Date
GB706065A true GB706065A (en) 1954-03-24

Family

ID=9723338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB151752A Expired GB706065A (en) 1952-01-18 1952-01-18 Improvements in or relating to sound rejection circuits for television receivers

Country Status (1)

Country Link
GB (1) GB706065A (en)

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