GB427053A - Modulating system for radio telephony and the like - Google Patents

Modulating system for radio telephony and the like

Info

Publication number
GB427053A
GB427053A GB1544/34A GB154434A GB427053A GB 427053 A GB427053 A GB 427053A GB 1544/34 A GB1544/34 A GB 1544/34A GB 154434 A GB154434 A GB 154434A GB 427053 A GB427053 A GB 427053A
Authority
GB
United Kingdom
Prior art keywords
rectifier
circuit
signal
jan
class
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
GB1544/34A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB427053A publication Critical patent/GB427053A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C7/00—Modulating electromagnetic waves
    • H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C5/00—Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Amplitude Modulation (AREA)

Abstract

427,053. Modulating systems. SCHUCHTER, K., 26, Hottingergasse, Innsbruck, Austria. Jan. 16, 1934, No. 1544. Convention date, Jan. 16, 1933. [Class 40 (v)] Modulation is effected by inductively coupling to the oscillating aerial circuit 4 a separate circuit comprising a coil 3 shunted by a tuning- condenser 5, a rectifier 2, and a transformer 1 supplied by the signal source. The signal may be from a microphone, and the rectifier 2 may be of the thermionic valve or crystal type. The circuit 3, 5 exerts a variable damping on the aerial circuit and so modulates the output in rhythm with the signal. The inductive coupling 3, 4 may be variable. No biassing battery is required for the rectifier, and the system is specially suitable for small portable transmitters. Reference has been directed by the Comptroller to Specifications 170,378 and 218,335, [both in Class 40 (v)].
GB1544/34A 1933-01-16 1934-01-16 Modulating system for radio telephony and the like Expired GB427053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT427053X 1933-01-16

Publications (1)

Publication Number Publication Date
GB427053A true GB427053A (en) 1935-04-15

Family

ID=3674038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1544/34A Expired GB427053A (en) 1933-01-16 1934-01-16 Modulating system for radio telephony and the like

Country Status (4)

Country Link
US (1) US2043448A (en)
BE (1) BE404135A (en)
FR (1) FR756957A (en)
GB (1) GB427053A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659868A (en) * 1948-07-09 1953-11-17 Ericsson Telefon Ab L M Modulation by magnetic control of superconductors
US2748284A (en) * 1952-07-31 1956-05-29 Raytheon Mfg Co Reactance modulator circuits
GB806291A (en) * 1956-04-16 1958-12-23 Marconi Instruments Ltd Improvements in or relating to amplitude modulator arrangements for high frequency energy

Also Published As

Publication number Publication date
FR756957A (en) 1933-12-18
BE404135A (en)
US2043448A (en) 1936-06-09

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