GB2146861B - Digital frequency discriminator - Google Patents

Digital frequency discriminator

Info

Publication number
GB2146861B
GB2146861B GB08324665A GB8324665A GB2146861B GB 2146861 B GB2146861 B GB 2146861B GB 08324665 A GB08324665 A GB 08324665A GB 8324665 A GB8324665 A GB 8324665A GB 2146861 B GB2146861 B GB 2146861B
Authority
GB
United Kingdom
Prior art keywords
digital frequency
frequency discriminator
discriminator
digital
frequency
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
GB08324665A
Other versions
GB2146861A (en
GB8324665D0 (en
Inventor
Christopher Keith Richardson
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB08324665A priority Critical patent/GB2146861B/en
Publication of GB8324665D0 publication Critical patent/GB8324665D0/en
Publication of GB2146861A publication Critical patent/GB2146861A/en
Application granted granted Critical
Publication of GB2146861B publication Critical patent/GB2146861B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/187—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using means for coarse tuning the voltage controlled oscillator of the loop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators)
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/091—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB08324665A 1983-09-14 1983-09-14 Digital frequency discriminator Expired GB2146861B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08324665A GB2146861B (en) 1983-09-14 1983-09-14 Digital frequency discriminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08324665A GB2146861B (en) 1983-09-14 1983-09-14 Digital frequency discriminator

Publications (3)

Publication Number Publication Date
GB8324665D0 GB8324665D0 (en) 1983-10-19
GB2146861A GB2146861A (en) 1985-04-24
GB2146861B true GB2146861B (en) 1987-01-14

Family

ID=10548799

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08324665A Expired GB2146861B (en) 1983-09-14 1983-09-14 Digital frequency discriminator

Country Status (1)

Country Link
GB (1) GB2146861B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1063641A (en) * 1964-06-01 1967-03-30 Thorn Electronics Ltd Improvements in frequency discriminators
GB1188281A (en) * 1966-01-21 1970-04-15 Serck Controls Ltd Improvements in or relating to Detection Means for Frequency Modulated Signals
GB1183452A (en) * 1966-02-17 1970-03-04 Dawe Instr Ltd Improvements in or relating to Speed Indicating Apparatus
CH434431A (en) * 1966-04-04 1967-04-30 Paillard Sa Electronic speed regulator of an electric motor
GB1251374A (en) * 1968-02-09 1971-10-27

Also Published As

Publication number Publication date
GB2146861A (en) 1985-04-24
GB8324665D0 (en) 1983-10-19

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020914