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GB664078A - Improvements in radio-frequency oscillators - Google Patents

Improvements in radio-frequency oscillators

Info

Publication number
GB664078A
GB664078A GB1012649A GB1012649A GB664078A GB 664078 A GB664078 A GB 664078A GB 1012649 A GB1012649 A GB 1012649A GB 1012649 A GB1012649 A GB 1012649A GB 664078 A GB664078 A GB 664078A
Authority
GB
United Kingdom
Prior art keywords
frequency
tuned
local oscillator
circuit
grid
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
GB1012649A
Inventor
Alexander Landman
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.)
GE Healthcare UK Ltd
Plessey Co Ltd
Original Assignee
GE Healthcare UK Ltd
Plessey 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 GE Healthcare UK Ltd, Plessey Co Ltd filed Critical GE Healthcare UK Ltd
Priority to GB1012649A priority Critical patent/GB664078A/en
Publication of GB664078A publication Critical patent/GB664078A/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
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Toys (AREA)

Abstract

664,078. Valve generating and receiving circuits. PLESSEY CO., Ltd. Feb. 2, 1950 [April 14, 1949], No. 10126/49. Drawings to Specification. Classes 40 (v) and 40 (vi). A multi-grid frequency changing stage comprises a valve with the control grid circuit tuned to the incoming carrier, the screen grid circuit tuned to the local oscillator frequency and the anode circuit tuned to the intermediate frequency. It is arranged that the local oscillator circuit is tuned to a frequency below that of the incoming carrier in order that the control grid circuit may be inductive at the local oscillator frequency. Oscillation is maintained due to feed-back over the screen grid to control grid capacity.
GB1012649A 1949-04-14 1949-04-14 Improvements in radio-frequency oscillators Expired GB664078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1012649A GB664078A (en) 1949-04-14 1949-04-14 Improvements in radio-frequency oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1012649A GB664078A (en) 1949-04-14 1949-04-14 Improvements in radio-frequency oscillators

Publications (1)

Publication Number Publication Date
GB664078A true GB664078A (en) 1952-01-02

Family

ID=9961987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1012649A Expired GB664078A (en) 1949-04-14 1949-04-14 Improvements in radio-frequency oscillators

Country Status (1)

Country Link
GB (1) GB664078A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018939B (en) * 1956-12-24 1957-11-07 Sueddeutsche Telefon App Kabel Single-stage vibration generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018939B (en) * 1956-12-24 1957-11-07 Sueddeutsche Telefon App Kabel Single-stage vibration generator

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