GB528893A - Improvements in or relating to circuits for the amplification and/or frequency-changing of electric osciallations - Google Patents

Improvements in or relating to circuits for the amplification and/or frequency-changing of electric osciallations

Info

Publication number
GB528893A
GB528893A GB14647/39A GB1464739A GB528893A GB 528893 A GB528893 A GB 528893A GB 14647/39 A GB14647/39 A GB 14647/39A GB 1464739 A GB1464739 A GB 1464739A GB 528893 A GB528893 A GB 528893A
Authority
GB
United Kingdom
Prior art keywords
grid
feed
frequency
current
resistance
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
GB14647/39A
Other languages
English (en)
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 Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB528893A publication Critical patent/GB528893A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/06—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using moving unheated wet elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Amplifiers (AREA)
  • Details Of Television Scanning (AREA)
GB14647/39A 1939-07-01 1939-05-16 Improvements in or relating to circuits for the amplification and/or frequency-changing of electric osciallations Expired GB528893A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL217992X 1939-07-01

Publications (1)

Publication Number Publication Date
GB528893A true GB528893A (en) 1940-11-08

Family

ID=34709394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14647/39A Expired GB528893A (en) 1939-07-01 1939-05-16 Improvements in or relating to circuits for the amplification and/or frequency-changing of electric osciallations

Country Status (6)

Country Link
US (1) US2232850A (ja)
BE (1) BE434444A (ja)
CH (2) CH212944A (ja)
FR (1) FR856581A (ja)
GB (1) GB528893A (ja)
NL (1) NL64722C (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488357A (en) * 1947-05-20 1949-11-15 Mcclatchy Broadeasting Company Negative feedback amplifying circuit
GB721550A (en) * 1952-01-24 1955-01-05 Marconi Wireless Telegraph Co Improvements in or relating to gain control circuit arrangements

Also Published As

Publication number Publication date
US2232850A (en) 1941-02-25
CH212944A (de) 1940-12-31
BE434444A (ja)
CH217992A (de) 1941-11-15
FR856581A (fr) 1940-06-18
NL64722C (ja)

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