GB603726A - Improvements in radio frequency oscillators - Google Patents

Improvements in radio frequency oscillators

Info

Publication number
GB603726A
GB603726A GB2351945A GB2351945A GB603726A GB 603726 A GB603726 A GB 603726A GB 2351945 A GB2351945 A GB 2351945A GB 2351945 A GB2351945 A GB 2351945A GB 603726 A GB603726 A GB 603726A
Authority
GB
United Kingdom
Prior art keywords
frequency
output
controlling
oscillator
mixer
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
GB2351945A
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.)
JOHN CHARLES BELCHER
Original Assignee
JOHN CHARLES BELCHER
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 JOHN CHARLES BELCHER filed Critical JOHN CHARLES BELCHER
Priority to GB2351945A priority Critical patent/GB603726A/en
Publication of GB603726A publication Critical patent/GB603726A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/20—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Transmitters (AREA)

Abstract

603,726. Automatic frequency-controlling systems. BELCHER, J. C. Sept. 12, 1945, No. 23519. [Class 38 (iv)] A method of stabilizing the output of a calibrated variable frequency oscillator A consists in feeding the signals therefrom, preferably after amplification by a buffer amplifier B, to a mixer C, where they are mixed with harmonics of stable oscillations from a low-frequency oscillator E, feeding the mixed output to a low-pass (audio frequency) filter F which attenuates all but one controlling lowfrequency of known value produced by the beating of the generator frequency with a harmonic of the oscillator E, and then, at G, mixing the controlling low-frequency with the output of a calibrated audio-frequency oscillator H which is set to produce zero beat therewith in the mixer, the output from the mixer G being fed to a frequency or reactance modulator I which, in turn, feeds its output to the tuned circuit of the signal generator A, thereby controlling or locking the resonant frequency of the signal generator. The final stabilized radio frequency oscillation is obtained from the buffer amplifier B.
GB2351945A 1945-09-12 1945-09-12 Improvements in radio frequency oscillators Expired GB603726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2351945A GB603726A (en) 1945-09-12 1945-09-12 Improvements in radio frequency oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2351945A GB603726A (en) 1945-09-12 1945-09-12 Improvements in radio frequency oscillators

Publications (1)

Publication Number Publication Date
GB603726A true GB603726A (en) 1948-06-22

Family

ID=10196935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2351945A Expired GB603726A (en) 1945-09-12 1945-09-12 Improvements in radio frequency oscillators

Country Status (1)

Country Link
GB (1) GB603726A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368437A (en) * 1977-03-07 1983-01-11 Wavetek Indiana, Inc. Wide frequency range signal generator including plural phase locked loops

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368437A (en) * 1977-03-07 1983-01-11 Wavetek Indiana, Inc. Wide frequency range signal generator including plural phase locked loops

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