GB580077A - Radio receivers - Google Patents

Radio receivers

Info

Publication number
GB580077A
GB580077A GB965544A GB965544A GB580077A GB 580077 A GB580077 A GB 580077A GB 965544 A GB965544 A GB 965544A GB 965544 A GB965544 A GB 965544A GB 580077 A GB580077 A GB 580077A
Authority
GB
United Kingdom
Prior art keywords
condensers
ganged
oscillator
input
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
GB965544A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to GB965544A priority Critical patent/GB580077A/en
Publication of GB580077A publication Critical patent/GB580077A/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
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

580,077. Valve receiving circuits. STANDARD TELEPHONES & CABLES, Ltd. (International Standard Electric Corporation). May 19, 1944, No. 9655. [Class 40 (v)] In a supersonic heterodyne receiver with two frequency-changing stages, the second I.F. being lower than the first, tuning condensers for the input, oscillator and I.F. circuits are ganged to a common shaft and the ratio of the capacitios of each pair of condensers (including associated stray capacity in parallel) remains constant for all positions of the shaft. As shown, the nth harmonic generated by the oscillator V2 is selected by the circuit C2L2 for the first frequency changer V1, the fundamental determined by the circuit C4L4 being used for the second frequency changer V3. C2 and C4 as well as the input and I.F. tuning condensers C1, C3, C5 are all ganged. The relations between the sizes of the condensers are as follows :
GB965544A 1944-05-19 1944-05-19 Radio receivers Expired GB580077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB965544A GB580077A (en) 1944-05-19 1944-05-19 Radio receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB965544A GB580077A (en) 1944-05-19 1944-05-19 Radio receivers

Publications (1)

Publication Number Publication Date
GB580077A true GB580077A (en) 1946-08-26

Family

ID=9876190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB965544A Expired GB580077A (en) 1944-05-19 1944-05-19 Radio receivers

Country Status (1)

Country Link
GB (1) GB580077A (en)

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