GB1314659A - Wide-band ultra-linear frequency discriminator - Google Patents

Wide-band ultra-linear frequency discriminator

Info

Publication number
GB1314659A
GB1314659A GB866572A GB866572A GB1314659A GB 1314659 A GB1314659 A GB 1314659A GB 866572 A GB866572 A GB 866572A GB 866572 A GB866572 A GB 866572A GB 1314659 A GB1314659 A GB 1314659A
Authority
GB
United Kingdom
Prior art keywords
filter
phasemeter
frequency discriminator
frequency
input
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
GB866572A
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
Compagnie Industrielle de Telecommunication CIT Alcatel SA
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 Alcatel CIT SA, Compagnie Industrielle de Telecommunication CIT Alcatel SA filed Critical Alcatel CIT SA
Publication of GB1314659A publication Critical patent/GB1314659A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators
    • H03D3/14—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of semiconductor devices having more than two electrodes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/90—Pitch determination of speech signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

1314659 Frequency discriminator COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATION CIT-ALCATEL 24 Feb 1972 [24 Feb 1971] 8665/72 Heading H3A A frequency discriminator comprises a phasemeter 6 with a linear characteristic in the range 0 to 360 degrees connected to the input 1 directly and also via a second order symmetric filter 4, there being provided an amplifier 8, e.g. an integrating amplifier between the phasemeter output and a control input of the filter. The filter 4 may be an active filter whose tuned frequency is controlled by the control voltage applied via a control circuit 13. The control voltage also obtainable as an output at terminal 14 is a unidirectional voltage varying linearly with frequency. Voltage limiters 2, 5 may be placed in the input paths of the phasemeter.
GB866572A 1971-02-24 1972-02-24 Wide-band ultra-linear frequency discriminator Expired GB1314659A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7106309A FR2126090B1 (en) 1971-02-24 1971-02-24

Publications (1)

Publication Number Publication Date
GB1314659A true GB1314659A (en) 1973-04-26

Family

ID=9072413

Family Applications (1)

Application Number Title Priority Date Filing Date
GB866572A Expired GB1314659A (en) 1971-02-24 1972-02-24 Wide-band ultra-linear frequency discriminator

Country Status (7)

Country Link
BE (1) BE779472A (en)
DE (1) DE2207781A1 (en)
FR (1) FR2126090B1 (en)
GB (1) GB1314659A (en)
IT (1) IT949184B (en)
LU (1) LU64814A1 (en)
NL (1) NL7202352A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198609A (en) * 1977-07-15 1980-04-15 Victor Company Of Japan, Limited Phase tracked loop frequency demodulator
FR2485294A1 (en) * 1980-06-23 1981-12-24 Trt Telecom Radio Electr FREQUENCY DEMODULATOR USING A VARIABLE DELAY CIRCUIT WITH RECEIVED FREQUENCY

Also Published As

Publication number Publication date
NL7202352A (en) 1972-08-28
LU64814A1 (en) 1972-12-05
IT949184B (en) 1973-06-11
FR2126090A1 (en) 1972-10-06
FR2126090B1 (en) 1974-02-15
BE779472A (en) 1972-08-17
DE2207781A1 (en) 1972-08-31

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee