GB2278747B - Improvements in or relating to frequency/phase comparators - Google Patents

Improvements in or relating to frequency/phase comparators

Info

Publication number
GB2278747B
GB2278747B GB9310208A GB9310208A GB2278747B GB 2278747 B GB2278747 B GB 2278747B GB 9310208 A GB9310208 A GB 9310208A GB 9310208 A GB9310208 A GB 9310208A GB 2278747 B GB2278747 B GB 2278747B
Authority
GB
United Kingdom
Prior art keywords
relating
frequency
phase comparators
comparators
phase
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
GB9310208A
Other versions
GB2278747A (en
GB9310208D0 (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.)
Roke Manor Research Ltd
Original Assignee
Roke Manor Research 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 Roke Manor Research Ltd filed Critical Roke Manor Research Ltd
Priority to GB9310208A priority Critical patent/GB2278747B/en
Publication of GB9310208D0 publication Critical patent/GB9310208D0/en
Publication of GB2278747A publication Critical patent/GB2278747A/en
Application granted granted Critical
Publication of GB2278747B publication Critical patent/GB2278747B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence
    • 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
    • H03L7/089—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 generating up-down pulses
    • H03L7/0891—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 generating up-down pulses the up-down pulses controlling source and sink current generators, e.g. a charge pump
    • H03L7/0895—Details of the current generators
    • 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
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/113—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using frequency discriminator
GB9310208A 1993-05-18 1993-05-18 Improvements in or relating to frequency/phase comparators Expired - Fee Related GB2278747B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9310208A GB2278747B (en) 1993-05-18 1993-05-18 Improvements in or relating to frequency/phase comparators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9310208A GB2278747B (en) 1993-05-18 1993-05-18 Improvements in or relating to frequency/phase comparators

Publications (3)

Publication Number Publication Date
GB9310208D0 GB9310208D0 (en) 1993-06-30
GB2278747A GB2278747A (en) 1994-12-07
GB2278747B true GB2278747B (en) 1997-12-03

Family

ID=10735678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9310208A Expired - Fee Related GB2278747B (en) 1993-05-18 1993-05-18 Improvements in or relating to frequency/phase comparators

Country Status (1)

Country Link
GB (1) GB2278747B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647983A1 (en) * 1995-12-04 1997-06-05 Papst Motoren Gmbh & Co Kg Physical variable control method and device e.g. for electronically commutated electric motor
US5838180A (en) * 1996-09-12 1998-11-17 Lucent Technologies Inc. Low-voltage frequency synthesizer
NL1015386C2 (en) 2000-06-06 2001-12-28 Ericsson Telefon Ab L M Phase lock circuit.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122404A (en) * 1978-01-23 1978-10-24 Rockwell International Corporation Combination phase detector voltage doubler and low-pass filter for use on a phase-lock loop
US4598217A (en) * 1984-03-19 1986-07-01 Itt Corporation High speed phase/frequency detector
GB2257316A (en) * 1991-06-25 1993-01-06 Ferranti Int Plc Phase-locked loop oscillator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122404A (en) * 1978-01-23 1978-10-24 Rockwell International Corporation Combination phase detector voltage doubler and low-pass filter for use on a phase-lock loop
US4598217A (en) * 1984-03-19 1986-07-01 Itt Corporation High speed phase/frequency detector
GB2257316A (en) * 1991-06-25 1993-01-06 Ferranti Int Plc Phase-locked loop oscillator

Also Published As

Publication number Publication date
GB2278747A (en) 1994-12-07
GB9310208D0 (en) 1993-06-30

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Legal Events

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

Effective date: 20010518