GB739449A - Improvements in or relating to electric amplifier circuits - Google Patents

Improvements in or relating to electric amplifier circuits

Info

Publication number
GB739449A
GB739449A GB5133/54A GB513354A GB739449A GB 739449 A GB739449 A GB 739449A GB 5133/54 A GB5133/54 A GB 5133/54A GB 513354 A GB513354 A GB 513354A GB 739449 A GB739449 A GB 739449A
Authority
GB
United Kingdom
Prior art keywords
valves
signal
grid
feb
absence
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
GB5133/54A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB739449A publication Critical patent/GB739449A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

739,449. Valve amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 22, 1954 [Feb. 23, 1953], No. 5133/54. Class 40 (6). An amplifier for operation direct from A.C. supply comprises one or more screen-grid valves with A.C. applied to both the gridcathode and anode-cathode circuits in such manner that in the absence of a signal on the control grid the anode current is substantially zero at any instant. In order to amplify throughout the mains supply cycle, three parallel-connected push-pull pairs of valves are used with their H.T. terminals 16, 161, 16<SP>11</SP> respectively connected to the phases of a threephase supply. In each pair 3, 4 the screens are connected directly to the H.T. terminal 16 &c. and the cathodes taken to a tap on an autotransformer 8, 9 such that the valves are normally always cut off in the absence of a signal. Signals to be amplified are applied to the grids in push-pull over rectifiers 14, 15 which prevent distortion due to grid current occurring. The cathode circuit is decoupled for signal frequencies by a condenser 17. The arrangement may be modified for amplifying direct currents.
GB5133/54A 1953-02-23 1954-02-22 Improvements in or relating to electric amplifier circuits Expired GB739449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL739449X 1953-02-23

Publications (1)

Publication Number Publication Date
GB739449A true GB739449A (en) 1955-10-26

Family

ID=19820478

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5133/54A Expired GB739449A (en) 1953-02-23 1954-02-22 Improvements in or relating to electric amplifier circuits

Country Status (3)

Country Link
BE (1) BE526715A (en)
DE (1) DE1003800B (en)
GB (1) GB739449A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039571B (en) * 1956-12-05 1958-09-25 Licentia Gmbh DC voltage amplifier with high vacuum tubes fed by phase-shifted voltages

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921982A (en) * 1930-03-06 1933-08-08 Sperry Gyroscope Co Inc Remote control system
AT129951B (en) * 1931-03-05 1932-10-25 Erich Schaffran Amplifier or generator arrangement to be fed from the AC network with tubes connected in push-pull.
GB612898A (en) * 1941-12-10 1948-11-18 Sperry Gyroscope Co Inc Improvements in or relating to vacuum tube amplifiers
CH234472A (en) * 1942-01-31 1944-09-30 Philips Nv Device for generating or amplifying high-frequency vibrations.
FR955136A (en) * 1946-11-06 1950-01-10

Also Published As

Publication number Publication date
DE1003800B (en) 1957-03-07
BE526715A (en)

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