GB429007A - Improvements in or relating to arrangements for modulating high frequency carrier waves - Google Patents

Improvements in or relating to arrangements for modulating high frequency carrier waves

Info

Publication number
GB429007A
GB429007A GB338/35A GB33835A GB429007A GB 429007 A GB429007 A GB 429007A GB 338/35 A GB338/35 A GB 338/35A GB 33835 A GB33835 A GB 33835A GB 429007 A GB429007 A GB 429007A
Authority
GB
United Kingdom
Prior art keywords
signal
valve
modulating
amplifier
circuit
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
GB338/35A
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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 Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Publication of GB429007A publication Critical patent/GB429007A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C1/00Amplitude modulation
    • H03C1/62Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present

Landscapes

  • Transmitters (AREA)
  • Amplifiers (AREA)

Abstract

429,007. Modulating systems. LORENZ AKT.-GES., C., 1, Lorenzweg, Tempelhof, Berlin. Jan. 4, 1935, No. 338. Convention date, Jan. 6, 1934. [Class 40 (v)] Modulating systems of the kind described in Specification 363,480, in which the mean carrier level is varied according to the amplitude of the modulating signal, are provided with a time-delay circuit traversed by the signal, the frequency-discriminating effect of which circuit is compensated by an opposite distortion in the signal amplifier. The signal is applied to a transformer 1 with two secondaries 2, 3 the signal being fed through an amplifier V with a final stage 7 to the modulating-valve 9, whilst the secondary 3 feeds the signal through a rectifier 4 and smoother A, to a reversing valve 5, the output of which is tapped into the grid circuit of the modulating-valve 9. The combination C, R forming the coupling between the valves 7, 9 has a small time constant. This gives a time delay in the application of the rectified voltage to the valve 9 which delay is necessarily small in order to prevent over-modulation when the signal strength rises quickly. The combination C, R discriminates against the lower frequency components of the signal fed from the valve 7. This is compensated by arranging that such components are emphasized in the amplifier V. The plate current of valve 9 traverses a winding on an iron-cored choke coil 8 in a high-frequency circuit between the carrier wave generator S and an amplifier 6.
GB338/35A 1934-01-06 1935-01-04 Improvements in or relating to arrangements for modulating high frequency carrier waves Expired GB429007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE429007X 1934-01-06

Publications (1)

Publication Number Publication Date
GB429007A true GB429007A (en) 1935-05-22

Family

ID=6477546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB338/35A Expired GB429007A (en) 1934-01-06 1935-01-04 Improvements in or relating to arrangements for modulating high frequency carrier waves

Country Status (3)

Country Link
US (1) US2127148A (en)
FR (1) FR783411A (en)
GB (1) GB429007A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448558A (en) * 1942-11-17 1948-09-07 Edwin K Stodola Modulation networks
US2649085A (en) * 1950-04-06 1953-08-18 Hardwick Stove Company Inc Broiler door and rack
DE1277376B (en) * 1964-07-15 1968-09-12 Tesla Np Circuit for the amplitude modulation of a transmitter

Also Published As

Publication number Publication date
US2127148A (en) 1938-08-16
FR783411A (en) 1935-07-12

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