GB420687A - Improvements in or relating to frequency modulating arrangements - Google Patents

Improvements in or relating to frequency modulating arrangements

Info

Publication number
GB420687A
GB420687A GB16272/33A GB1627233A GB420687A GB 420687 A GB420687 A GB 420687A GB 16272/33 A GB16272/33 A GB 16272/33A GB 1627233 A GB1627233 A GB 1627233A GB 420687 A GB420687 A GB 420687A
Authority
GB
United Kingdom
Prior art keywords
valve
frequency
june
relating
grid
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
GB16272/33A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB420687A publication Critical patent/GB420687A/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
    • H03C3/24—Angle modulation by means of variable impedance by means of a variable resistive element, e.g. tube

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

420,687. Thermionic modulating- circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. June 6, 1933, No. 16272. Convention date, June 4, 1932. [Class 40 (v)] A valve of the kind described in Specification 418,132 is used as a variable-resistance element in a system of frequency-modulation. The frequency of the oscillator valve V1 is determined by a tuned circuit comprising a coil L and two condensers C1, C2 in parallel. The condenser C2 is in series with a valve V2 having an electron density - regulating grid G1 and a velocity-regulating grid G2, carrying fixed potentials. Modulating signals from the transformer T are applied to the control grid G, to vary the internal impedance of the valve V2, and therefore the frequency of the tuned circuit L, C1, C2.
GB16272/33A 1932-06-04 1933-06-06 Improvements in or relating to frequency modulating arrangements Expired GB420687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE420687X 1932-06-04

Publications (1)

Publication Number Publication Date
GB420687A true GB420687A (en) 1934-12-06

Family

ID=6453241

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16272/33A Expired GB420687A (en) 1932-06-04 1933-06-06 Improvements in or relating to frequency modulating arrangements

Country Status (1)

Country Link
GB (1) GB420687A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758225C (en) * 1937-04-13 1953-04-16 Rca Corp Circuit for stabilizing the mean carrier frequency of a frequency or phase modulated high frequency transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758225C (en) * 1937-04-13 1953-04-16 Rca Corp Circuit for stabilizing the mean carrier frequency of a frequency or phase modulated high frequency transmitter

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