GB985553A - Improvements relating to frequency modulated oscillators - Google Patents

Improvements relating to frequency modulated oscillators

Info

Publication number
GB985553A
GB985553A GB1946460A GB1946460A GB985553A GB 985553 A GB985553 A GB 985553A GB 1946460 A GB1946460 A GB 1946460A GB 1946460 A GB1946460 A GB 1946460A GB 985553 A GB985553 A GB 985553A
Authority
GB
United Kingdom
Prior art keywords
collector
frequency modulated
improvements relating
june
modulation
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
GB1946460A
Inventor
Jan Tadeusz Zakrzewski
Nigel Paul Harvey
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1946460A priority Critical patent/GB985553A/en
Publication of GB985553A publication Critical patent/GB985553A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
    • H03C3/16—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit in which the active element simultaneously serves as the active element of an oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
    • H03C3/145—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit by using semiconductor elements

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

985,553. Frequency modulation. ELECTRIC & MUSICAL INDUSTRIES Ltd. June 1, 1961 [June 1, 1960], No. 19464/60. Heading H3R. A transistor oscillator TR1 with resonant base circuit C 2 , L 1 is frequency modulated by modulation applied to its collector circuit to vary the collector/base capacitance, or, to prevent amplitude modulation, by using a separate modulator transistor TR 2 whose modulated value of collector/base capacitance is coupled in parallel with that of transistor oscillator TR 1 by coupling capacitors C 6 , C 7 .
GB1946460A 1960-06-01 1960-06-01 Improvements relating to frequency modulated oscillators Expired GB985553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1946460A GB985553A (en) 1960-06-01 1960-06-01 Improvements relating to frequency modulated oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1946460A GB985553A (en) 1960-06-01 1960-06-01 Improvements relating to frequency modulated oscillators

Publications (1)

Publication Number Publication Date
GB985553A true GB985553A (en) 1965-03-10

Family

ID=10129808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1946460A Expired GB985553A (en) 1960-06-01 1960-06-01 Improvements relating to frequency modulated oscillators

Country Status (1)

Country Link
GB (1) GB985553A (en)

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