GB466854A - Improvements in or relating to wireless or like receivers of the superheterodyne type - Google Patents

Improvements in or relating to wireless or like receivers of the superheterodyne type

Info

Publication number
GB466854A
GB466854A GB33664/35A GB3366435A GB466854A GB 466854 A GB466854 A GB 466854A GB 33664/35 A GB33664/35 A GB 33664/35A GB 3366435 A GB3366435 A GB 3366435A GB 466854 A GB466854 A GB 466854A
Authority
GB
United Kingdom
Prior art keywords
frequency
wireless
dec
varying
signal
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
GB33664/35A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB466854A publication Critical patent/GB466854A/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

Abstract

466,854. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Dec. 4, 1935, No. 33664. Convention date, Dec. 4, 1934. [Class 40 (v)] In a superheterodyne receiver the local oscillator is inoperative except when tuned accurately to the tinput signal. The Figure shows a frequency changer 34 the local oscillation to which is supplied from a second frequency changer 38 by combining the signal with intermediate frequency energy from the output of the frequency changer 34. The frequency changers 34, 38 are of the two control grid type and the coupling 23, 24, 25 is tuned to the sum or difference frequency and preferably ganged with the tuning means of the input circuit. The range through which local oscillations is generated may be adjusted by varying the mutual conductance of the valve 38 as by varying the screen potential.
GB33664/35A 1934-12-04 1935-12-04 Improvements in or relating to wireless or like receivers of the superheterodyne type Expired GB466854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US755872A US2039923A (en) 1934-12-04 1934-12-04 Superheterodyne receiver

Publications (1)

Publication Number Publication Date
GB466854A true GB466854A (en) 1937-06-04

Family

ID=25041019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33664/35A Expired GB466854A (en) 1934-12-04 1935-12-04 Improvements in or relating to wireless or like receivers of the superheterodyne type

Country Status (2)

Country Link
US (1) US2039923A (en)
GB (1) GB466854A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496994A (en) * 1945-12-22 1950-02-07 Rca Corp Frequency dividing network
BE482557A (en) * 1947-05-19

Also Published As

Publication number Publication date
US2039923A (en) 1936-05-05

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