GB599382A - Radio transmitters with anode voltage modulation - Google Patents

Radio transmitters with anode voltage modulation

Info

Publication number
GB599382A
GB599382A GB1823/45A GB182345A GB599382A GB 599382 A GB599382 A GB 599382A GB 1823/45 A GB1823/45 A GB 1823/45A GB 182345 A GB182345 A GB 182345A GB 599382 A GB599382 A GB 599382A
Authority
GB
United Kingdom
Prior art keywords
modulation
anode
valve
winding
transformer
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
GB1823/45A
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.)
Patelhold Patenverwertungs and Elektro-Holding AG
Original Assignee
Patelhold Patenverwertungs and Elektro-Holding 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 Patelhold Patenverwertungs and Elektro-Holding AG filed Critical Patelhold Patenverwertungs and Elektro-Holding AG
Publication of GB599382A publication Critical patent/GB599382A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
    • H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
    • H03C1/24—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to different grid
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes

Landscapes

  • Amplitude Modulation (AREA)
  • Amplifiers (AREA)

Abstract

599,382. Valve modulating circuits. PATELHOLD PATENTVERWERTUNGS- & ELECTRO-HOLDING AKT.-GES. Jan. 23, 1945, No. 1823. Convention date, Jan. 4, 1944. [Class 40 (v)] In a radio transmitter in which the H.F. power stage is anode modulated, modulation of the same order of magnitude is applied additionally in antiphase to the grid of the power stage and in phase to the anode of the driver stage. Modulating signals from the output transformer 13 of the modulator 12 are applied to the anodes of the H.F. power valve 7. The audio e.m.f. appearing across a choke 9<1> in the cathode circuit of the valves 7 is applied over a blocking condenser to the winding 22 of a transformer 21. The e.m.f. across the winding 23 is applied as grid modulation to the valves 7, and that across the winding 24 as anode modulation to the driver valve 2. In another embodiment, Fig. 2 (not shown), the choke 9<1> and transformer 21 are omitted, grid modulation being derived from an additional winding on the transformer 13, and anode modulation for the valve 7 from a tap on the choke 14. Phaseadjusting networks may be included in the various modulation paths. The H.F. power stage, while preferably operated in class C, may alternatively operate in class A or B.
GB1823/45A 1944-01-04 1945-01-23 Radio transmitters with anode voltage modulation Expired GB599382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH599382X 1944-01-04

Publications (1)

Publication Number Publication Date
GB599382A true GB599382A (en) 1948-03-11

Family

ID=4522650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1823/45A Expired GB599382A (en) 1944-01-04 1945-01-23 Radio transmitters with anode voltage modulation

Country Status (5)

Country Link
US (1) US2436066A (en)
BE (1) BE460090A (en)
CH (1) CH243240A (en)
FR (1) FR912554A (en)
GB (1) GB599382A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629858A (en) * 1950-12-29 1953-02-24 Rca Corp Transistor amplitude modulator
US2644925A (en) * 1950-12-29 1953-07-07 Rca Corp Semiconductor amplitude modulation system
US2877424A (en) * 1955-07-11 1959-03-10 Time Inc Method of connecting two cascaded modulators to provide a variable percentage of modulations
US2907956A (en) * 1957-11-15 1959-10-06 Hollingsworth R Lee Gating modulation
US3021487A (en) * 1958-09-02 1962-02-13 Sperry Rand Corp Frequency modulation distortion cancellation system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL90377B (en) * 1937-10-29
US2226258A (en) * 1938-09-22 1940-12-24 Bell Telephone Labor Inc Grid bias modulating system

Also Published As

Publication number Publication date
CH243240A (en) 1946-06-30
US2436066A (en) 1948-02-17
BE460090A (en)
FR912554A (en) 1946-08-13

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