GB2420667B - Frequency comparator - Google Patents

Frequency comparator

Info

Publication number
GB2420667B
GB2420667B GB0426049A GB0426049A GB2420667B GB 2420667 B GB2420667 B GB 2420667B GB 0426049 A GB0426049 A GB 0426049A GB 0426049 A GB0426049 A GB 0426049A GB 2420667 B GB2420667 B GB 2420667B
Authority
GB
United Kingdom
Prior art keywords
frequency comparator
comparator
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 - Fee Related
Application number
GB0426049A
Other versions
GB2420667A (en
GB0426049D0 (en
Inventor
Jeff Butters
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.)
Snell Advanced Media Ltd
Original Assignee
Snell and Wilcox 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 Snell and Wilcox Ltd filed Critical Snell and Wilcox Ltd
Priority to GB0426049A priority Critical patent/GB2420667B/en
Publication of GB0426049D0 publication Critical patent/GB0426049D0/en
Publication of GB2420667A publication Critical patent/GB2420667A/en
Application granted granted Critical
Publication of GB2420667B publication Critical patent/GB2420667B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/003—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means
    • H03D13/004—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means the logic means delivering pulses at more than one terminal, e.g. up and down pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB0426049A 2004-11-26 2004-11-26 Frequency comparator Expired - Fee Related GB2420667B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0426049A GB2420667B (en) 2004-11-26 2004-11-26 Frequency comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0426049A GB2420667B (en) 2004-11-26 2004-11-26 Frequency comparator

Publications (3)

Publication Number Publication Date
GB0426049D0 GB0426049D0 (en) 2004-12-29
GB2420667A GB2420667A (en) 2006-05-31
GB2420667B true GB2420667B (en) 2008-02-06

Family

ID=33561430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0426049A Expired - Fee Related GB2420667B (en) 2004-11-26 2004-11-26 Frequency comparator

Country Status (1)

Country Link
GB (1) GB2420667B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908174A (en) * 1973-01-29 1975-09-23 Sony Corp Frequency and phase comparator
EP0428869A1 (en) * 1989-10-17 1991-05-29 Nec Corporation Phase detector suitable for use in phase lock loop
US6574287B1 (en) * 1999-01-27 2003-06-03 Conexant Systems, Inc. Frequency/Phase comparison circuit with gated reference and signal inputs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908174A (en) * 1973-01-29 1975-09-23 Sony Corp Frequency and phase comparator
EP0428869A1 (en) * 1989-10-17 1991-05-29 Nec Corporation Phase detector suitable for use in phase lock loop
US6574287B1 (en) * 1999-01-27 2003-06-03 Conexant Systems, Inc. Frequency/Phase comparison circuit with gated reference and signal inputs

Also Published As

Publication number Publication date
GB2420667A (en) 2006-05-31
GB0426049D0 (en) 2004-12-29

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Legal Events

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

Effective date: 20221126