GB633605A - Improvements in circuit-arrangements for amplifying frequency-modulated oscillations - Google Patents

Improvements in circuit-arrangements for amplifying frequency-modulated oscillations

Info

Publication number
GB633605A
GB633605A GB1945/48A GB194548A GB633605A GB 633605 A GB633605 A GB 633605A GB 1945/48 A GB1945/48 A GB 1945/48A GB 194548 A GB194548 A GB 194548A GB 633605 A GB633605 A GB 633605A
Authority
GB
United Kingdom
Prior art keywords
circuit
frequency
valve
input
variation
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
GB1945/48A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Philips Electronics 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 Gloeilampenfabrieken NV, Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB633605A publication Critical patent/GB633605A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/06—Limiters of angle-modulated signals; such limiters combined with discriminators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

633,605. Frequency modulation. PHILIPS ELECTRICAL, Ltd. Jan. 22, 1948, No. 1945. Convention date, Jan. 25, 1947. [Class 40 (v)] In a valve amplifying circuit 5, 8 for frequency modulated oscillations in which a control voltage is derived indicative of amplitude modulation in the output and supplied to a control grid of one valve at least of the amplifying circuit to keep the amplitude practically constant a non-shunted resistance 26 or 27 connected in a cathode circuit common to both the input and output circuits counteracts any variation of the input capacity. of the valve(s) and phase distortion due to detuning of the input circuit. The control voltage may be derived from one anode circuit via a condenser 14 and a diode 15 shunted by a tapped resistor 17, 18. The tapping byepasses to earth any radio frequency by a circuit 19, 20 series tuned to the central frequency, and passes low-frequency amplitude variation control voltages to valves 5, 8 through resistors 21, 22, the cathode resistors 26, 27 suppressing input capacity variation.
GB1945/48A 1947-01-25 1948-01-22 Improvements in circuit-arrangements for amplifying frequency-modulated oscillations Expired GB633605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL633605X 1947-01-25

Publications (1)

Publication Number Publication Date
GB633605A true GB633605A (en) 1949-12-19

Family

ID=19788806

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1945/48A Expired GB633605A (en) 1947-01-25 1948-01-22 Improvements in circuit-arrangements for amplifying frequency-modulated oscillations

Country Status (3)

Country Link
DE (1) DE834865C (en)
FR (1) FR961356A (en)
GB (1) GB633605A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE532654A (en) * 1953-10-21

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH173561A (en) * 1933-01-26 1934-11-30 Philips Nv Circuit for amplifying high frequency oscillations.

Also Published As

Publication number Publication date
FR961356A (en) 1950-05-11
DE834865C (en) 1952-03-24

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