GB627630A - Polyphase frequency modulators - Google Patents

Polyphase frequency modulators

Info

Publication number
GB627630A
GB627630A GB5134/47A GB513447A GB627630A GB 627630 A GB627630 A GB 627630A GB 5134/47 A GB5134/47 A GB 5134/47A GB 513447 A GB513447 A GB 513447A GB 627630 A GB627630 A GB 627630A
Authority
GB
United Kingdom
Prior art keywords
valve
valves
grid
frequency
control
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
GB5134/47A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB627630A publication Critical patent/GB627630A/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
    • H03B5/22—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 active element in amplifier being vacuum tube
    • 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
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/24—Angle modulation by means of variable impedance by means of a variable resistive element, e.g. tube
GB5134/47A 1945-09-01 1947-02-21 Polyphase frequency modulators Expired GB627630A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US613979A US2492184A (en) 1945-09-01 1945-09-01 Polyphase oscillator

Publications (1)

Publication Number Publication Date
GB627630A true GB627630A (en) 1949-08-12

Family

ID=24459415

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5134/47A Expired GB627630A (en) 1945-09-01 1947-02-21 Polyphase frequency modulators

Country Status (5)

Country Link
US (2) US2492184A (de)
BE (1) BE470920A (de)
ES (1) ES178724A1 (de)
GB (1) GB627630A (de)
NL (1) NL66753C (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633534A (en) * 1950-02-01 1953-03-31 Bell Telephone Labor Inc Variable frequency oscillator
US2675523A (en) * 1950-10-20 1954-04-13 Fisk Bert Phase modulation keyer
US2714697A (en) * 1953-04-02 1955-08-02 Donald C Small 3-phase, rc, variable voltage, variable frequency oscillator for electric motor
US2971165A (en) * 1958-09-12 1961-02-07 Genisco Inc Multi-phase oscillator with amplitude stabilizing means
US3141139A (en) * 1961-12-26 1964-07-14 Bell Telephone Labor Inc Direct-coupled transistor oscillator having variable source impedance for controlling frequency
US3918008A (en) * 1972-12-27 1975-11-04 Proximity Devices Voltage controlled sweep oscillator
US3831112A (en) * 1972-12-27 1974-08-20 Proximity Devices Voltage controlled sweep oscillator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1745559A (en) * 1924-12-01 1930-02-04 Schrack Eduard Electron-discharge-tube generator
US1972535A (en) * 1930-05-14 1934-09-04 Robert M Page Polyphase relaxation circuit oscillator
US2024489A (en) * 1932-01-08 1935-12-17 Rca Corp Circuit arrangement for generating or amplifying electric oscillations
US2055090A (en) * 1933-02-23 1936-09-22 Rca Corp Electrical oscillation generator
US2236985A (en) * 1939-10-28 1941-04-01 Gen Electric Oscillator
US2373437A (en) * 1940-02-15 1945-04-10 Emi Ltd Twin-discharge tube oscillator
US2321269A (en) * 1941-11-21 1943-06-08 Rca Corp Frequency modulation

Also Published As

Publication number Publication date
USB249184I5 (de)
BE470920A (de)
NL66753C (de)
US2492184A (en) 1949-12-27
ES178724A1 (es) 1947-09-01

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