GB1046680A - Improvements in or relating to television receiver channel selectors - Google Patents

Improvements in or relating to television receiver channel selectors

Info

Publication number
GB1046680A
GB1046680A GB4530964A GB4530964A GB1046680A GB 1046680 A GB1046680 A GB 1046680A GB 4530964 A GB4530964 A GB 4530964A GB 4530964 A GB4530964 A GB 4530964A GB 1046680 A GB1046680 A GB 1046680A
Authority
GB
United Kingdom
Prior art keywords
tuning
relating
television receiver
receiver channel
inductance
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
GB4530964A
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 GB1046680A publication Critical patent/GB1046680A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H03D7/08—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between the same two electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Filters And Equalizers (AREA)
  • Superheterodyne Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

1,046,680. Radio receiving circuits. STANDARD TELEPHONES & CABLES Ltd. Nov. 6, 1964 [Nov. 7, 1963], No. 45309/64. Heading H3Q. In a television tuner in which a valve R 0 (Fig. 3, not shown) or transistor is used as a mixer at V.H.F. but as an I.F. preamplifier on U.H.F., the I.F. tuning coil L ZF for the U.H.F. range is connected to a tapping point on an inductance L MW forming part of the input circuit for the valve or transistor on the V.H.F. range. The parts of the inductance L MW form, with the input capacity C 9 K and a series capacitor C 3 a bridge circuit whereby interaction between the U.H.F. and V.H.F. circuits is avoided. U.H.F. tuning may be effected by means of a movable core within the coil L MW ; modifications are described in the Specification (Figs. 4, 5, not shown) in which respectively an additional variable inductor is connected in series and in which switch tuning is performed using incremental induces.
GB4530964A 1963-11-07 1964-11-06 Improvements in or relating to television receiver channel selectors Expired GB1046680A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG39112A DE1200385B (en) 1963-11-07 1963-11-07 Meter-wave television channel selector, the mixer stage of which is used in decimeter-wave reception to amplify the intermediate frequency

Publications (1)

Publication Number Publication Date
GB1046680A true GB1046680A (en) 1966-10-26

Family

ID=7126069

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4530964A Expired GB1046680A (en) 1963-11-07 1964-11-06 Improvements in or relating to television receiver channel selectors

Country Status (3)

Country Link
BE (1) BE669385A (en)
DE (1) DE1200385B (en)
GB (1) GB1046680A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275630B (en) * 1965-11-12 1968-08-22 Saba Gmbh Self-oscillating mixer for overlay receivers

Also Published As

Publication number Publication date
DE1200385B (en) 1965-09-09
BE669385A (en) 1966-03-09

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