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GB771979A - Improvements in or relating to receiving circuit arrangements for frequency-modulated oscillations - Google Patents

Improvements in or relating to receiving circuit arrangements for frequency-modulated oscillations

Info

Publication number
GB771979A
GB771979A GB15220/55A GB1522055A GB771979A GB 771979 A GB771979 A GB 771979A GB 15220/55 A GB15220/55 A GB 15220/55A GB 1522055 A GB1522055 A GB 1522055A GB 771979 A GB771979 A GB 771979A
Authority
GB
United Kingdom
Prior art keywords
frequency
relating
receiving circuit
circuit arrangements
modulated oscillations
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
GB15220/55A
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 GB771979A publication Critical patent/GB771979A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03D7/08—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 the same two electrodes
    • 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)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

771,979. Frequency modulation; frequency changing. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 26, 1955 [May 29, 1954], No. 15220/55. Drawings to Specification. Classes 40(5) and 40(6) Frequency modulated received waves are applied through a pre-amplifier and peak amplitude limiter to a self-oscillating additive frequency changer to avoid lockin of the local oscillation frequency on any occurrence of high amplitudes of the waves. The limiter may be a rectifier shunting the anode circuit of the preamplifier and biased to a value .5 volts or less from a filter network in the HT supply line.
GB15220/55A 1954-05-29 1955-05-26 Improvements in or relating to receiving circuit arrangements for frequency-modulated oscillations Expired GB771979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE771979X 1954-05-29

Publications (1)

Publication Number Publication Date
GB771979A true GB771979A (en) 1957-04-10

Family

ID=6680098

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15220/55A Expired GB771979A (en) 1954-05-29 1955-05-26 Improvements in or relating to receiving circuit arrangements for frequency-modulated oscillations

Country Status (1)

Country Link
GB (1) GB771979A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149987A (en) * 1983-11-18 1985-06-19 Plessey Co Plc Frequency modulation detectors
US4608539A (en) * 1983-11-18 1986-08-26 Plessey Overseas Limited FM detector with injection locked divider input circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149987A (en) * 1983-11-18 1985-06-19 Plessey Co Plc Frequency modulation detectors
US4608539A (en) * 1983-11-18 1986-08-26 Plessey Overseas Limited FM detector with injection locked divider input circuit

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