GB587648A - Improvements in frequency-controlled electric oscillators - Google Patents

Improvements in frequency-controlled electric oscillators

Info

Publication number
GB587648A
GB587648A GB2554144A GB2554144A GB587648A GB 587648 A GB587648 A GB 587648A GB 2554144 A GB2554144 A GB 2554144A GB 2554144 A GB2554144 A GB 2554144A GB 587648 A GB587648 A GB 587648A
Authority
GB
United Kingdom
Prior art keywords
frequency
oscillator
controlled electric
modulation
group xxxv
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
GB2554144A
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.)
BENJAMIN LEONARD CORDY ANGELL
JOHN BARTRAM LOVELL FOOT
General Electric Co PLC
Original Assignee
BENJAMIN LEONARD CORDY ANGELL
JOHN BARTRAM LOVELL FOOT
General Electric Co PLC
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 BENJAMIN LEONARD CORDY ANGELL, JOHN BARTRAM LOVELL FOOT, General Electric Co PLC filed Critical BENJAMIN LEONARD CORDY ANGELL
Priority to GB2554144A priority Critical patent/GB587648A/en
Publication of GB587648A publication Critical patent/GB587648A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/047—Automatic frequency control using an auxiliary signal, e.g. low frequency scanning of the locking range or superimposing a special signal on the input signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop

Landscapes

  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

587,648. Automatic tuning control. GENERAL ELECTRIC CO., Ltd., ANGELL, B. L. C., and FOOT, J. B. LOVELL-. Dec. 20, 1944, No. 25541. Addition to 566,829, [Group XXXV]. [Class 40 (v)] [Also in Group XXXV] The parent invention is modified by niodulating the oscillator to be stabilized rather than the standard oscillator so as to give rise to a discriminator output sufficient to start the A.F.C. action. Amplitude or frequency modulation may be used, but the depth of modulation must be small and the side-band frequencies arising therefrom sufficiently close to the oscillator frequency f, to preclude any material affect on the intelligence being transmitted or received as the case may be. Specifications 518,480 and 572,918 are referred to.
GB2554144A 1944-12-20 1944-12-20 Improvements in frequency-controlled electric oscillators Expired GB587648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2554144A GB587648A (en) 1944-12-20 1944-12-20 Improvements in frequency-controlled electric oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2554144A GB587648A (en) 1944-12-20 1944-12-20 Improvements in frequency-controlled electric oscillators

Publications (1)

Publication Number Publication Date
GB587648A true GB587648A (en) 1947-05-01

Family

ID=10229350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2554144A Expired GB587648A (en) 1944-12-20 1944-12-20 Improvements in frequency-controlled electric oscillators

Country Status (1)

Country Link
GB (1) GB587648A (en)

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