GB982165A - Improvements in or relating to stabilised frequency oscillator circuit arrangements - Google Patents

Improvements in or relating to stabilised frequency oscillator circuit arrangements

Info

Publication number
GB982165A
GB982165A GB3842/63A GB384263A GB982165A GB 982165 A GB982165 A GB 982165A GB 3842/63 A GB3842/63 A GB 3842/63A GB 384263 A GB384263 A GB 384263A GB 982165 A GB982165 A GB 982165A
Authority
GB
United Kingdom
Prior art keywords
transistor
circuit
capacitor
diodes
feedback
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
GB3842/63A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB982165A publication Critical patent/GB982165A/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
    • H03C3/20—Angle modulation by means of variable impedance by means of a variable reactive element the element being a voltage-dependent capacitor
    • 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
    • H03B5/12—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 semiconductor device
    • H03B5/1203—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 semiconductor device the amplifier being a single transistor
    • 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
    • H03B5/12—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 semiconductor device
    • H03B5/1231—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 semiconductor device the amplifier comprising one or more bipolar transistors
    • 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
    • H03B5/12—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 semiconductor device
    • H03B5/1237—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 semiconductor device comprising means for varying the frequency of the generator
    • H03B5/1275—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 semiconductor device comprising means for varying the frequency of the generator having further means for varying a parameter in dependence on the frequency
    • H03B5/1278—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 semiconductor device comprising means for varying the frequency of the generator having further means for varying a parameter in dependence on the frequency the parameter being an amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range
    • 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

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Dc-Dc Converters (AREA)

Abstract

982,165. Valve and transistor oscillating circuits; frequency modulation. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Jan. 30, 1963 [Feb. 2, 1962; Oct. 10, 1962], No. 3842/63. Headings H3F, H3R and H3T. An oscillator of high frequency stability comprises a transistor with a stabilizing resistor 2, Fig. 1, in the emitter lead and a tuned circuit 4 in the base circuit, to which positive feedback is applied by means of a coupling inductor 3 in the collector circuit. In addition, negative feedback is applied to the oscillator by means of a second coupling inductor 8 in the collector circuit, which is connected in series with two rectifier diodes 9, 10 having different threshold bias voltages. The diodes permit the passage of current through the negative feedback inductor only during the peak values of the oscillations produced by the oscillator and so determine the amplitude of oscillation. The bias applied to the diodes 9, 10 may comprise a synchronizing signal. In a modification (Fig. 2, not shown), the two diodes are replaced by a single Zener diode. The arrangement may be modified to form a modulator for frequency modulation. In the modification the feedback to the tuned circuit 4, Fig. 3, includes, in addition to positive and negative feedback over inductors 3, 8 respectively a capacitive feedback over capacitor 17, derived from the output load 7. In this way the effective capacity shunting the tuned circuit 4 depends upon the gain of the transistor, which is varied by the modulating signals, the latter being applied to the base over resistor 5. The emitter-circuit resistor 2 is by-passed for the modulating signals by a capacitor 15. The capacitor 15 may be replaced by an inductor, or may alternatively be connected to the emitter, instead of to the collector circuit of the transistor, the capacitor 15 then being omitted. The transistor may in every case be replaced by a thermionic valve.
GB3842/63A 1962-02-02 1963-01-30 Improvements in or relating to stabilised frequency oscillator circuit arrangements Expired GB982165A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL274343 1962-02-02
NL284198 1962-10-10

Publications (1)

Publication Number Publication Date
GB982165A true GB982165A (en) 1965-02-03

Family

ID=26641822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3842/63A Expired GB982165A (en) 1962-02-02 1963-01-30 Improvements in or relating to stabilised frequency oscillator circuit arrangements

Country Status (7)

Country Link
BE (1) BE627867A (en)
CH (1) CH414769A (en)
DE (1) DE1250887B (en)
FR (1) FR1346132A (en)
GB (1) GB982165A (en)
NL (2) NL284198A (en)
SE (1) SE302979B (en)

Also Published As

Publication number Publication date
NL284198A (en)
BE627867A (en)
DE1250887B (en) 1967-09-28
SE302979B (en) 1968-08-12
NL274343A (en)
FR1346132A (en) 1963-12-13
CH414769A (en) 1966-06-15

Similar Documents

Publication Publication Date Title
GB1121439A (en) Electronic tunable oscillator circuit
GB790976A (en) Improvements in or relating to aperiodically back-coupled transistor circuits
GB958789A (en) Improvements in or relating to frequency modulations of crystal-stabilized oscillators
US3201718A (en) Frequency modulation circuit
GB1089339A (en) Improvements in or relating to multiplicative mixing with transistors
GB982165A (en) Improvements in or relating to stabilised frequency oscillator circuit arrangements
US2885575A (en) Limiting circuit
GB1321459A (en) Circuit arrangement for realising logical functions
GB1377830A (en) Electric circuits and radio receivers including such circuits
US3852686A (en) Automatic frequency control circuit
US2900608A (en) Modulating circuits
US3097345A (en) Oscillator having amplitude proportional to input signal
GB569327A (en) Improvements relating to generators of frequency modulated oscillations
GB1006907A (en) Improvements in or relating to circuits including a tunnel diode
GB1270564A (en) Controllable electric oscillator
GB721106A (en) Improvements in or relating to frequency-stabilized oscillator circuit arrangements
GB1038990A (en) Improvements in or relating to transistor oscillators
US2994043A (en) F-m oscillator circuit arrangements
GB817319A (en) Stabilised electric transistor oscillators
GB1011920A (en) Improvements in or relating to frequency modulated crystal controlled electric oscillators
GB999290A (en) Improvements in or relating to crystal oscillators
GB1283966A (en) Self-oscillating voltage converter
GB842547A (en) Improvements in or relating to amplifiier devices including at least one transistor
GB1051017A (en)
GB1005937A (en) Improvements in or relating to crystal stabilised frequency modulated oscillators