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

  • Amplitude Modulation (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Amplifiers (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 (en:Method)
BE (1) BE451440A (en:Method)
CH (1) CH250224A (en:Method)
DE (1) DE869358C (en:Method)
FR (1) FR896849A (en:Method)
GB (1) GB643712A (en:Method)
NL (2) NL65812C (en:Method)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR962237A (en:Method) * 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
NL106866B (en:Method)
DE869358C (de) 1953-03-05
NL65812C (en:Method)
FR896849A (fr) 1945-03-05
BE451440A (en:Method)
US2539952A (en) 1951-01-30
CH250224A (de) 1947-08-15

Similar Documents

Publication Publication Date Title
GB643712A (en) Improvements in and relating to circuits for phase-modulation or frequency-modulation of an electrical oscillation
US4308620A (en) System for maintaining phase coincidence between a carrier wave and sidebands produced by a transmitter
GB524416A (en) Improvements in or relating to modulated carrier wave transmitters
GB672188A (en) Improvements in and relating to modulation systems
GB545879A (en) Improvements in variable reactance devices, particularly for frequency modulation
GB454709A (en) Improvements in or relating to modulated carrier wave systems
US2076264A (en) Phase and frequency control of oscillations
GB754216A (en) Improvements in or relating to circuit arrangements for the generation of frequency modulated oscillations
GB490990A (en) Arrangements for modulating high frequency oscillations
US2445618A (en) Modulation system
GB641543A (en) Improvements in or relating to frequency-modulation circuits
US2142186A (en) Magnetron modulation method
US2184571A (en) Modulation system
GB584465A (en) An improved apparatus for varying or modulating the frequency of crystal controlled circuits
GB625268A (en) Improvements in circuits for modulating the frequency or the phase of electrical oscillations
US2353203A (en) Frequency modulator
GB599382A (en) Radio transmitters with anode voltage modulation
US2120800A (en) Transmitter
US2379201A (en) Timing modulation
US2870414A (en) Suppressed carrier modulator
US2114336A (en) Modulated wave transmitter
US2201016A (en) Modulator
GB721985A (en) Improvements in or relating to frequency modulated ultra-high frequency circuit arrangements
US1835388A (en) High frequency modulating system
US2305911A (en) High efficiency loss modulator