GB869064A - Combined television and radio receivers - Google Patents

Combined television and radio receivers

Info

Publication number
GB869064A
GB869064A GB3954357A GB3954357A GB869064A GB 869064 A GB869064 A GB 869064A GB 3954357 A GB3954357 A GB 3954357A GB 3954357 A GB3954357 A GB 3954357A GB 869064 A GB869064 A GB 869064A
Authority
GB
United Kingdom
Prior art keywords
frequency
transformer
amplitude
dec
receiver
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
GB3954357A
Inventor
James Alan Hutton
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.)
Murphy Radio Ltd
Original Assignee
Murphy Radio 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 Murphy Radio Ltd filed Critical Murphy Radio Ltd
Priority to GB3954357A priority Critical patent/GB869064A/en
Publication of GB869064A publication Critical patent/GB869064A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

869,064. Frequency modulation. MURPHY RADIO Ltd. Dec. 19, 1958 [Dec. 19, 1957], No. 39543/57. Class 40(5). In a V.H.F. receiver for the alternative reception of amplitude or frequency modulated transmissions the final I.F. stage 8 has a narrower band-pass characteristic than the preceding I.F. stages and is arranged to be tunable by the operator. As shown, the output from the second frequency changer 1 of a receiver for television with accompanying amplitude modulated sound, or frequency modulated transmissions, is supplied via a transformer 3, which is designed to allow for drift and ease of tuning, to the control grid of a pentode 4, which with the switch 7 in the position shown receives A.G.C. bias over the line 5. A loosely coupled transformer 8 in the anode circuit of the valve 4 supplies a ratio detector 9, a resistor 16 being adjusted for maximum amplitude modulation rejection. The switches 7, 11, 14, are coupled together and in the position shown are set for amplitude modulation reception, the output of the detector 9 being supplied via a noise limiter 13 and screened line 15 to the audio frequency amplifier. The transformer 8 has an iron dust core in a plastic casing which is adjustable by a tuning knob.
GB3954357A 1957-12-19 1957-12-19 Combined television and radio receivers Expired GB869064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3954357A GB869064A (en) 1957-12-19 1957-12-19 Combined television and radio receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3954357A GB869064A (en) 1957-12-19 1957-12-19 Combined television and radio receivers

Publications (1)

Publication Number Publication Date
GB869064A true GB869064A (en) 1961-05-25

Family

ID=10410134

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3954357A Expired GB869064A (en) 1957-12-19 1957-12-19 Combined television and radio receivers

Country Status (1)

Country Link
GB (1) GB869064A (en)

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