GB424615A - Improvements in superheterodyne radio receivers - Google Patents

Improvements in superheterodyne radio receivers

Info

Publication number
GB424615A
GB424615A GB34071/34A GB3407134A GB424615A GB 424615 A GB424615 A GB 424615A GB 34071/34 A GB34071/34 A GB 34071/34A GB 3407134 A GB3407134 A GB 3407134A GB 424615 A GB424615 A GB 424615A
Authority
GB
United Kingdom
Prior art keywords
grid
valve
circuit
local oscillations
superheterodyne
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
GB34071/34A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB424615A publication Critical patent/GB424615A/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
    • H03D7/10—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 different pairs of electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Superheterodyne Receivers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

424,615. Valve circuits for wireless reception. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Nov. 27, 1934, No. 34071. Convention date, Feb. 12. [Class 40 (v)] The frequency changing stage of a superheterodyne re ceiver comprises a multi - grid valve the received and local oscillations be. ing applied to separate grids 1, 3 ; an oscillatory circuit 14 tuned to the desired intermediate frequency is connected between the grid 3 carrying the local oscillations, and a further grid 4. An additional screen grid 5 prevents back coupling between the output circuit 13 and circuit 14. The arrangement greatly increases the conversion conductance of the valve.
GB34071/34A 1934-02-12 1934-11-27 Improvements in superheterodyne radio receivers Expired GB424615A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1934N0036318 DE686267C (en) 1934-02-12 1934-02-12 Overlay receiving circuit, in which the vibrations to be mixed are fed to separate grids of a multi-grate tube

Publications (1)

Publication Number Publication Date
GB424615A true GB424615A (en) 1935-02-25

Family

ID=6476932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34071/34A Expired GB424615A (en) 1934-02-12 1934-11-27 Improvements in superheterodyne radio receivers

Country Status (6)

Country Link
US (1) US2088043A (en)
BE (1) BE407809A (en)
DE (1) DE686267C (en)
FR (1) FR785491A (en)
GB (1) GB424615A (en)
NL (1) NL42089C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE481504A (en) * 1947-03-29
US2616036A (en) * 1948-12-29 1952-10-28 Zenith Radio Corp Signal translating apparatus

Also Published As

Publication number Publication date
NL42089C (en) 1937-12-15
US2088043A (en) 1937-07-27
FR785491A (en) 1935-08-10
BE407809A (en) 1935-03-30
DE686267C (en) 1940-01-10

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