GB810311A - Improvements in or relating to automatic frequency control circuits - Google Patents

Improvements in or relating to automatic frequency control circuits

Info

Publication number
GB810311A
GB810311A GB229856A GB229856A GB810311A GB 810311 A GB810311 A GB 810311A GB 229856 A GB229856 A GB 229856A GB 229856 A GB229856 A GB 229856A GB 810311 A GB810311 A GB 810311A
Authority
GB
United Kingdom
Prior art keywords
frequency
frequency control
automatic frequency
relating
control circuits
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
GB229856A
Inventor
Geoffrey D Arcy Browne
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve 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 Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB229856A priority Critical patent/GB810311A/en
Publication of GB810311A publication Critical patent/GB810311A/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
    • H03J7/08—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 using varactors, i.e. voltage variable reactive diodes
    • 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

  • Circuits Of Receivers In General (AREA)

Abstract

810,311. Automatic frequency control systems. MULLARD RADIO VALVE CO. Ltd. Jan. 24, 1956, No. 2298/56. Drawings to Specification. Class 38 (4). A tuned circuit such as the frequency-determing circuit of a sine wave oscillator is shunted by a back-biased P-N junction diode to which an A.F.C. voltage is applied so that the junction capacitance is varied and the tuning or frequency stabilized. The system may be applied to stabilizing the frequency of the oscillator of a self-oscillating additive mixer in a V.H.F./F.M. receiver, or the mean frequency of an F.M. transmitter. The small-capacity diodes may be made as described in Specification 803,583, [Group XXXVI]. Specification 501,238, [Group XXXVI], also is referred to.
GB229856A 1956-01-24 1956-01-24 Improvements in or relating to automatic frequency control circuits Expired GB810311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB229856A GB810311A (en) 1956-01-24 1956-01-24 Improvements in or relating to automatic frequency control circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB229856A GB810311A (en) 1956-01-24 1956-01-24 Improvements in or relating to automatic frequency control circuits

Publications (1)

Publication Number Publication Date
GB810311A true GB810311A (en) 1959-03-11

Family

ID=9737101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB229856A Expired GB810311A (en) 1956-01-24 1956-01-24 Improvements in or relating to automatic frequency control circuits

Country Status (1)

Country Link
GB (1) GB810311A (en)

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