GB1011920A - Improvements in or relating to frequency modulated crystal controlled electric oscillators - Google Patents

Improvements in or relating to frequency modulated crystal controlled electric oscillators

Info

Publication number
GB1011920A
GB1011920A GB1214561A GB1214561A GB1011920A GB 1011920 A GB1011920 A GB 1011920A GB 1214561 A GB1214561 A GB 1214561A GB 1214561 A GB1214561 A GB 1214561A GB 1011920 A GB1011920 A GB 1011920A
Authority
GB
United Kingdom
Prior art keywords
frequency modulated
series
relating
controlled electric
crystal controlled
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
GB1214561A
Inventor
Noel Arthur Lockley
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.)
BAE Systems Defence Systems Ltd
Original Assignee
AT&E Bridgnorth 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 AT&E Bridgnorth Ltd filed Critical AT&E Bridgnorth Ltd
Priority to GB1214561A priority Critical patent/GB1011920A/en
Publication of GB1011920A publication Critical patent/GB1011920A/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
    • H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
    • H03C3/222—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode using bipolar transistors

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

1,011,920. Frequency modulation. A.T. & E. (BRIDGNORTH) Ltd. March 6, 1962 [April 5, 1961], No. 12145/61. Drawings to Specification. Heading H3R. A series resonant crystal, a variable inductor and a back-biased semi-conductor variable capacitor series resonant with the inductor at the crystal series resonance frequency are connected in series between a transistor emitter and a capacitive tapping of the resonant collector circuit of a transistor oscillator, so that modulation applied through an R.F. choke across the diode capacitor produces a frequency modulated output. The base is at R.F. earth potential but is biased to vary the oscillation amplitude from a potentiometer across the operating potential.
GB1214561A 1961-04-05 1961-04-05 Improvements in or relating to frequency modulated crystal controlled electric oscillators Expired GB1011920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1214561A GB1011920A (en) 1961-04-05 1961-04-05 Improvements in or relating to frequency modulated crystal controlled electric oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1214561A GB1011920A (en) 1961-04-05 1961-04-05 Improvements in or relating to frequency modulated crystal controlled electric oscillators

Publications (1)

Publication Number Publication Date
GB1011920A true GB1011920A (en) 1965-12-01

Family

ID=9999167

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1214561A Expired GB1011920A (en) 1961-04-05 1961-04-05 Improvements in or relating to frequency modulated crystal controlled electric oscillators

Country Status (1)

Country Link
GB (1) GB1011920A (en)

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