GB562432A - Improvements in and relating to frequency modulation system - Google Patents

Improvements in and relating to frequency modulation system

Info

Publication number
GB562432A
GB562432A GB6244/43A GB624443A GB562432A GB 562432 A GB562432 A GB 562432A GB 6244/43 A GB6244/43 A GB 6244/43A GB 624443 A GB624443 A GB 624443A GB 562432 A GB562432 A GB 562432A
Authority
GB
United Kingdom
Prior art keywords
fed
circuit
voltage
quadrature
phase
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
GB6244/43A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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
Priority claimed from US440172A external-priority patent/US2347458A/en
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB562432A publication Critical patent/GB562432A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
    • H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/06—Means for changing frequency deviation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator

Landscapes

  • Control Of Ac Motors In General (AREA)
  • Amplitude Modulation (AREA)
  • Amplifiers (AREA)
GB6244/43A 1942-04-23 1943-04-19 Improvements in and relating to frequency modulation system Expired GB562432A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US440172A US2347458A (en) 1942-04-23 1942-04-23 Frequency modulation system
US444843A US2347459A (en) 1942-04-23 1942-05-28 Frequency modulation apparatus

Publications (1)

Publication Number Publication Date
GB562432A true GB562432A (en) 1944-06-30

Family

ID=27032333

Family Applications (2)

Application Number Title Priority Date Filing Date
GB6244/43A Expired GB562432A (en) 1942-04-23 1943-04-19 Improvements in and relating to frequency modulation system
GB8573/43A Expired GB564045A (en) 1942-04-23 1943-05-28 Improvements in and relating to frequency modulation apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB8573/43A Expired GB564045A (en) 1942-04-23 1943-05-28 Improvements in and relating to frequency modulation apparatus

Country Status (4)

Country Link
US (1) US2347459A (fr)
BE (2) BE477900A (fr)
FR (2) FR926719A (fr)
GB (2) GB562432A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551348A (en) * 1945-03-28 1951-05-01 Philco Corp Electrical apparatus
US2460965A (en) * 1945-09-10 1949-02-08 Zenith Radio Corp Phase modulation system
US2645710A (en) * 1948-03-12 1953-07-14 Hartz Julius Radio transmission and carrier wave modulation
US2590784A (en) * 1948-11-26 1952-03-25 Philco Corp Heterodyne frequency modulator with automatic deviation control
US2659813A (en) * 1950-02-11 1953-11-17 Bell Telephone Labor Inc Frequency modulation repeater

Also Published As

Publication number Publication date
GB564045A (en) 1944-09-11
US2347459A (en) 1944-04-25
BE466324A (fr)
FR55048E (fr) 1951-06-05
FR926719A (fr) 1947-10-09
BE477900A (fr)

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