GB9818982D0 - Frequency synthesisers - Google Patents

Frequency synthesisers

Info

Publication number
GB9818982D0
GB9818982D0 GBGB9818982.2A GB9818982A GB9818982D0 GB 9818982 D0 GB9818982 D0 GB 9818982D0 GB 9818982 A GB9818982 A GB 9818982A GB 9818982 D0 GB9818982 D0 GB 9818982D0
Authority
GB
United Kingdom
Prior art keywords
frequency synthesisers
synthesisers
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.)
Granted
Application number
GBGB9818982.2A
Other versions
GB2341285A (en
GB2341285B (en
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.)
NEC Technologies UK Ltd
Original Assignee
NEC Technologies UK 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 NEC Technologies UK Ltd filed Critical NEC Technologies UK Ltd
Priority to GB9818982A priority Critical patent/GB2341285B/en
Publication of GB9818982D0 publication Critical patent/GB9818982D0/en
Priority to PCT/JP1999/004713 priority patent/WO2000014882A1/en
Priority to AU54463/99A priority patent/AU5446399A/en
Publication of GB2341285A publication Critical patent/GB2341285A/en
Application granted granted Critical
Publication of GB2341285B publication Critical patent/GB2341285B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H03L7/101—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional control signal to the controlled loop oscillator derived from a signal generated in the loop
    • 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
GB9818982A 1998-09-02 1998-09-02 Frequency synthesisers Expired - Fee Related GB2341285B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9818982A GB2341285B (en) 1998-09-02 1998-09-02 Frequency synthesisers
PCT/JP1999/004713 WO2000014882A1 (en) 1998-09-02 1999-08-31 Frequency synthesizers
AU54463/99A AU5446399A (en) 1998-09-02 1999-08-31 Frequency synthesizers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9818982A GB2341285B (en) 1998-09-02 1998-09-02 Frequency synthesisers

Publications (3)

Publication Number Publication Date
GB9818982D0 true GB9818982D0 (en) 1998-10-21
GB2341285A GB2341285A (en) 2000-03-08
GB2341285B GB2341285B (en) 2001-12-19

Family

ID=10838125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9818982A Expired - Fee Related GB2341285B (en) 1998-09-02 1998-09-02 Frequency synthesisers

Country Status (3)

Country Link
AU (1) AU5446399A (en)
GB (1) GB2341285B (en)
WO (1) WO2000014882A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI108688B (en) * 2000-06-30 2002-02-28 Nokia Corp Method and arrangement for setting the frequency
GB0202884D0 (en) 2002-02-07 2002-03-27 Nokia Corp Synthesiser
US7321267B2 (en) 2005-03-23 2008-01-22 Nokia Corporation Compensating capacitive dielectric absorption induced frequency error in a phase locked loop

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611175A (en) * 1970-03-26 1971-10-05 Sylvania Electric Prod Search circuit for frequency synthesizer
JP2841693B2 (en) * 1990-04-19 1998-12-24 日本電気株式会社 PLL frequency synthesizer
DE69107891T2 (en) * 1990-05-21 1995-11-02 Nippon Electric Co Phase locked loop circuit.
JPH0613898A (en) * 1992-06-29 1994-01-21 Nec Corp Frequency synthesizer
GB2317279B (en) * 1996-09-11 2001-01-24 Nec Technologies Frequency synthesisers

Also Published As

Publication number Publication date
WO2000014882A1 (en) 2000-03-16
GB2341285A (en) 2000-03-08
GB2341285B (en) 2001-12-19
AU5446399A (en) 2000-03-27

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Legal Events

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

Effective date: 20040902