GB1129352A - Improvements in frequency modulated oscillators - Google Patents

Improvements in frequency modulated oscillators

Info

Publication number
GB1129352A
GB1129352A GB9958/66A GB995866A GB1129352A GB 1129352 A GB1129352 A GB 1129352A GB 9958/66 A GB9958/66 A GB 9958/66A GB 995866 A GB995866 A GB 995866A GB 1129352 A GB1129352 A GB 1129352A
Authority
GB
United Kingdom
Prior art keywords
frequency
march
transistor
base
control signal
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
GB9958/66A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB1129352A publication Critical patent/GB1129352A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
    • 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

1,129,352. Frequency modulation. COMPAGNIE FRANCAISE THOMSON-HOUSTON-HOTCHKISS BRANDT. 7 March, 1966 [9 March, 1965], No. 9958/66. Headings H3A and H3R. The frequency of an oscillatory circuit 2 is modulated by means of a transistor 21 coupled to it, the base-emitter capacitance of the transistor 21 being varied by a modulation signal applied to its base. A part of the oscillator output is fed to a mixer 41 together with a reference signal from oscillator 42 to produce an automatic frequency control signal which varies the capacitance of a diode 30 forming part of the tuned circuit. Temperature compensation is also provided by diodes 37 which vary the control signal in response to temperature changes.
GB9958/66A 1965-03-09 1966-03-07 Improvements in frequency modulated oscillators Expired GB1129352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8404A FR1436659A (en) 1965-03-09 1965-03-09 Improvements to frequency modulated oscillators

Publications (1)

Publication Number Publication Date
GB1129352A true GB1129352A (en) 1968-10-02

Family

ID=8573231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9958/66A Expired GB1129352A (en) 1965-03-09 1966-03-07 Improvements in frequency modulated oscillators

Country Status (7)

Country Link
BE (1) BE677111A (en)
CH (1) CH437441A (en)
ES (1) ES323933A1 (en)
FR (1) FR1436659A (en)
GB (1) GB1129352A (en)
NL (1) NL6602995A (en)
SE (1) SE329866B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2615157A1 (en) * 1976-04-07 1977-10-13 Siemens Ag DEVICE FOR GENERATING MEDIUM FREQUENCY CURRENTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2615157A1 (en) * 1976-04-07 1977-10-13 Siemens Ag DEVICE FOR GENERATING MEDIUM FREQUENCY CURRENTS

Also Published As

Publication number Publication date
FR1436659A (en) 1966-04-29
CH437441A (en) 1967-06-15
ES323933A1 (en) 1966-11-16
SE329866B (en) 1970-10-26
BE677111A (en) 1966-08-29
NL6602995A (en) 1966-09-12

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