FR869048A - Systèmes de transmission à modulation de fréquence - Google Patents

Systèmes de transmission à modulation de fréquence

Info

Publication number
FR869048A
FR869048A FR869048DA FR869048A FR 869048 A FR869048 A FR 869048A FR 869048D A FR869048D A FR 869048DA FR 869048 A FR869048 A FR 869048A
Authority
FR
France
Prior art keywords
frequency modulation
transmission systems
modulation transmission
systems
frequency
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
Other languages
English (en)
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR869048A publication Critical patent/FR869048A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03C3/02—Details
    • H03C3/04—Means in or combined with modulating stage for reducing amplitude modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/28—Angle modulation by means of variable impedance using variable impedance driven mechanically or acoustically
FR869048D 1940-02-20 1941-01-02 Systèmes de transmission à modulation de fréquence Expired FR869048A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US319877A US2218524A (en) 1940-02-20 1940-02-20 Frequency modulation system
US326898A US2250104A (en) 1940-02-20 1940-03-30 Frequency regulation

Publications (1)

Publication Number Publication Date
FR869048A true FR869048A (fr) 1942-01-22

Family

ID=26982185

Family Applications (2)

Application Number Title Priority Date Filing Date
FR869048D Expired FR869048A (fr) 1940-02-20 1941-01-02 Systèmes de transmission à modulation de fréquence
FR878762D Expired FR878762A (fr) 1940-02-20 1941-01-24 Procédé de régulation de fréquence

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR878762D Expired FR878762A (fr) 1940-02-20 1941-01-24 Procédé de régulation de fréquence

Country Status (6)

Country Link
US (2) US2218524A (en:Method)
BE (1) BE441132A (en:Method)
DE (1) DE882424C (en:Method)
FR (2) FR869048A (en:Method)
GB (1) GB546677A (en:Method)
NL (1) NL67475C (en:Method)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425657A (en) * 1941-04-17 1947-08-12 Rca Corp Short-wave apparatus
US2440600A (en) * 1941-05-14 1948-04-27 Rca Corp Electric motor control
US2475779A (en) * 1941-05-14 1949-07-12 Rca Corp Wave length modulator and control means
US2966676A (en) * 1942-06-30 1960-12-27 Bessie E Fox Electronic apparatus and method for measuring distance
US2794956A (en) * 1942-06-30 1957-06-04 Fox Benjamin Frequency modulation system
US2422422A (en) * 1942-08-31 1947-06-17 Rca Corp Reactance tube controlled generator
US2415868A (en) * 1942-10-28 1947-02-18 Rca Corp Timing modulation
US2434259A (en) * 1943-06-22 1948-01-13 Bell Telephone Labor Inc Circuit arrangement utilizing a plurality of electron discharge devices
US2511137A (en) * 1944-12-16 1950-06-13 Rca Corp Frequency control
US2609509A (en) * 1945-06-13 1952-09-02 Bertram C Hill Electrical testing apparatus
US2490448A (en) * 1945-11-09 1949-12-06 Amalgamated Wireless Australas Frequency changer
US2588730A (en) * 1947-05-02 1952-03-11 Wayne R Johnson Method and apparatus for frequency response measurement
US2615129A (en) * 1947-05-16 1952-10-21 Edwin M Mcmillan Synchro-cyclotron
US2659813A (en) * 1950-02-11 1953-11-17 Bell Telephone Labor Inc Frequency modulation repeater
US2688730A (en) * 1950-10-18 1954-09-07 Smith Meeker Engineering Co Stable frequency generator system
US2761065A (en) * 1953-05-27 1956-08-28 Harris A Robinson Frequency control system
US3202918A (en) * 1962-10-03 1965-08-24 Armand P Lucchesi Frequency multiplier
US3789302A (en) * 1972-03-31 1974-01-29 Microwave Ass Inc Fm heterodyne transmitter
US10424278B2 (en) * 2017-08-02 2019-09-24 Applied Invention, Llc Bell with subharmonic difference tone

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE399079A (en:Method) * 1931-09-17
BE428896A (en:Method) * 1937-07-09

Also Published As

Publication number Publication date
US2250104A (en) 1941-07-22
DE882424C (de) 1953-07-09
FR878762A (fr) 1943-01-29
US2218524A (en) 1940-10-22
BE441132A (en:Method) 1941-10-31
NL67475C (en:Method) 1951-03-15
GB546677A (en) 1942-07-24

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