GB643712A - Improvements in and relating to circuits for phase-modulation or frequency-modulation of an electrical oscillation - Google Patents

Improvements in and relating to circuits for phase-modulation or frequency-modulation of an electrical oscillation

Info

Publication number
GB643712A
GB643712A GB20020/46A GB2002046A GB643712A GB 643712 A GB643712 A GB 643712A GB 20020/46 A GB20020/46 A GB 20020/46A GB 2002046 A GB2002046 A GB 2002046A GB 643712 A GB643712 A GB 643712A
Authority
GB
United Kingdom
Prior art keywords
oscillator
phase
valve
resistance
voltage
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
GB20020/46A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB643712A publication Critical patent/GB643712A/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
    • H03C3/14—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

Landscapes

  • Amplifiers (AREA)
  • Amplitude Modulation (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB20020/46A 1942-07-11 1946-07-04 Improvements in and relating to circuits for phase-modulation or frequency-modulation of an electrical oscillation Expired GB643712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL250224X 1942-07-11

Publications (1)

Publication Number Publication Date
GB643712A true GB643712A (en) 1950-09-27

Family

ID=19781055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20020/46A Expired GB643712A (en) 1942-07-11 1946-07-04 Improvements in and relating to circuits for phase-modulation or frequency-modulation of an electrical oscillation

Country Status (7)

Country Link
US (1) US2539952A (xx)
BE (1) BE451440A (xx)
CH (1) CH250224A (xx)
DE (1) DE869358C (xx)
FR (1) FR896849A (xx)
GB (1) GB643712A (xx)
NL (2) NL106866B (xx)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR962237A (xx) * 1947-03-01 1950-06-07
US2683252A (en) * 1950-05-25 1954-07-06 Bendix Aviat Corp Crystal controlled angle modulation system
DE976238C (de) * 1953-05-28 1963-05-16 Telefunken Patent Schaltung eines rueckgekoppelten Roehrengenerators zur Frequenzmodulation mit grossem Frequenzhub
DE977479C (de) * 1953-08-20 1966-08-04 Siemens Ag Schaltungsanordnung zur Frequenzmodulation
GB757629A (en) * 1954-01-15 1956-09-19 Marconi Wireless Telegraph Co Improvements in or relating to reactance valve circuit arrangements
CN109387670B (zh) * 2017-08-07 2020-12-29 中国科学院沈阳自动化研究所 一种基于差分降噪的sicm电压调制成像装置和方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278429A (en) * 1939-12-27 1942-04-07 Rca Corp Reactance tube modulation
US2298438A (en) * 1940-10-17 1942-10-13 Rca Corp Frequency modulation system
GB551344A (en) * 1941-08-16 1943-02-18 Cossor Ltd A C Improvements relating to the frequency control of thermionic valve oscillators
US2351368A (en) * 1942-06-03 1944-06-13 Rca Corp Reactance tube
US2350171A (en) * 1942-06-19 1944-05-30 Rca Corp Reactance controlled generator
US2356483A (en) * 1942-07-02 1944-08-22 Philco Radio & Television Corp Frequency control system
US2394427A (en) * 1942-11-09 1946-02-05 Rca Corp Wave length modulation
US2419527A (en) * 1943-02-27 1947-04-29 Gen Electric Radio frequency transmitter monitoring system and method

Also Published As

Publication number Publication date
NL65812C (xx)
US2539952A (en) 1951-01-30
FR896849A (fr) 1945-03-05
CH250224A (de) 1947-08-15
NL106866B (xx)
BE451440A (xx)
DE869358C (de) 1953-03-05

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