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GB1406438A - Oscillators - Google Patents

Oscillators

Info

Publication number
GB1406438A
GB1406438A GB21472A GB21472A GB1406438A GB 1406438 A GB1406438 A GB 1406438A GB 21472 A GB21472 A GB 21472A GB 21472 A GB21472 A GB 21472A GB 1406438 A GB1406438 A GB 1406438A
Authority
GB
United Kingdom
Prior art keywords
integrators
voltage
multipliers
inputs
outputs
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
GB21472A
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 Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB21472A priority Critical patent/GB1406438A/en
Publication of GB1406438A publication Critical patent/GB1406438A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power
    • 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
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0066—Amplitude or AM detection
    • 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
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0078—Functional aspects of oscillators generating or using signals in quadrature
    • 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
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/01—Varying the frequency of the oscillations by manual means
    • 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
    • H03B27/00—Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs

Landscapes

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

Abstract

1406438 Automatic voltage control MARCONI CO Ltd 21 Nov 1972 [4 Jan 1972] 214/72 Heading G3R [Also in Division H3] In an oscillator comprising two series-connected integrators 1, 2, the feedback path 3 being completed over an inverter 4, the two outputs from the integrators 1, 2 are each converted to the square by application to both inputs of a corresponding multiplier 20, 21. They are added together and to an oppositely-poled D.C. control voltage from terminal 25 in adding circuit. The resultant D.C. voltage is inverted by inverter 27 and applied as second input to two multipliers 28, 29, the first inputs of which are derived from the outputs of integrators 1, 2 respectively. The outputs of multipliers 28, 29 are applied over resistors 30, 31 respectively to the inputs of integrators 1, 2. The arrangement is such that if the D.C. voltage generated by multipliers 20, 21 exceeds the control voltage applied to terminal 25, negative feedback is applied by multipliers 28, 29 to integrators 1, 2 respectively, while if the voltage is less than that applied to terminal 25, positive feedback is applied to the integrators 1, 2.
GB21472A 1972-01-04 1972-01-04 Oscillators Expired GB1406438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB21472A GB1406438A (en) 1972-01-04 1972-01-04 Oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21472A GB1406438A (en) 1972-01-04 1972-01-04 Oscillators

Publications (1)

Publication Number Publication Date
GB1406438A true GB1406438A (en) 1975-09-17

Family

ID=9700428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21472A Expired GB1406438A (en) 1972-01-04 1972-01-04 Oscillators

Country Status (1)

Country Link
GB (1) GB1406438A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149154A (en) * 1983-10-21 1985-06-05 Datron Electronics Limited Improvements in and relating to variable frequency oscillators
FR2556546A1 (en) * 1983-12-09 1985-06-14 Thomson Csf METHOD AND CIRCUIT FOR DEMODULATING CHROMINANCE SIGNALS IN A PAL-TYPE TELEVISION SYSTEM
FR2604572A1 (en) * 1986-09-30 1988-04-01 Thomson Csf Oscillator with frequency proportional to a control voltage
EP0371549A1 (en) * 1988-11-28 1990-06-06 Koninklijke Philips Electronics N.V. Controllable quadrature oscillator
EP0453035A1 (en) * 1990-04-20 1991-10-23 Koninklijke Philips Electronics N.V. Controllable oscillator circuit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149154A (en) * 1983-10-21 1985-06-05 Datron Electronics Limited Improvements in and relating to variable frequency oscillators
FR2556546A1 (en) * 1983-12-09 1985-06-14 Thomson Csf METHOD AND CIRCUIT FOR DEMODULATING CHROMINANCE SIGNALS IN A PAL-TYPE TELEVISION SYSTEM
EP0149378A1 (en) * 1983-12-09 1985-07-24 Thomson-Csf Method and circuit for colour signal demodulation in a PAL television system
US4644388A (en) * 1983-12-09 1987-02-17 Thomson-Csf Process and circuit for the demodulation of chrominance signals
FR2604572A1 (en) * 1986-09-30 1988-04-01 Thomson Csf Oscillator with frequency proportional to a control voltage
EP0371549A1 (en) * 1988-11-28 1990-06-06 Koninklijke Philips Electronics N.V. Controllable quadrature oscillator
US4973920A (en) * 1988-11-28 1990-11-27 U.S. Philips Corporation Controllable quadrature oscillator
EP0453035A1 (en) * 1990-04-20 1991-10-23 Koninklijke Philips Electronics N.V. Controllable oscillator circuit

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee