GB2399959B - A frequency synthesiser and a method of modifying a frequency therefor - Google Patents

A frequency synthesiser and a method of modifying a frequency therefor

Info

Publication number
GB2399959B
GB2399959B GB0306674A GB0306674A GB2399959B GB 2399959 B GB2399959 B GB 2399959B GB 0306674 A GB0306674 A GB 0306674A GB 0306674 A GB0306674 A GB 0306674A GB 2399959 B GB2399959 B GB 2399959B
Authority
GB
United Kingdom
Prior art keywords
frequency
modifying
therefor
synthesiser
frequency synthesiser
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 - Lifetime
Application number
GB0306674A
Other versions
GB0306674D0 (en
GB2399959A (en
Inventor
Neil Turner
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority to GB0306674A priority Critical patent/GB2399959B/en
Publication of GB0306674D0 publication Critical patent/GB0306674D0/en
Publication of GB2399959A publication Critical patent/GB2399959A/en
Application granted granted Critical
Publication of GB2399959B publication Critical patent/GB2399959B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03L7/08—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
    • 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
    • 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
    • H03L7/12—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal
    • 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
    • H03L7/197—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/199—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division with reset of the frequency divider or the counter, e.g. for assuring initial synchronisation
    • 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
    • H03L7/095—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using a lock detector
GB0306674A 2003-03-22 2003-03-22 A frequency synthesiser and a method of modifying a frequency therefor Expired - Lifetime GB2399959B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0306674A GB2399959B (en) 2003-03-22 2003-03-22 A frequency synthesiser and a method of modifying a frequency therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0306674A GB2399959B (en) 2003-03-22 2003-03-22 A frequency synthesiser and a method of modifying a frequency therefor

Publications (3)

Publication Number Publication Date
GB0306674D0 GB0306674D0 (en) 2003-04-30
GB2399959A GB2399959A (en) 2004-09-29
GB2399959B true GB2399959B (en) 2005-04-13

Family

ID=9955364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0306674A Expired - Lifetime GB2399959B (en) 2003-03-22 2003-03-22 A frequency synthesiser and a method of modifying a frequency therefor

Country Status (1)

Country Link
GB (1) GB2399959B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357381A (en) * 1999-12-13 2001-06-20 Sony Uk Ltd Changing output frequency of a phase locked loop
JP2001339300A (en) * 2000-05-26 2001-12-07 Matsushita Electric Ind Co Ltd Pll frequency synthesizer
US6396890B1 (en) * 1998-07-17 2002-05-28 Motorola, Inc. Phase corrected frequency synthesizers
US20030034846A1 (en) * 2001-08-20 2003-02-20 Koninklijke Philips Electronics N.V. Frequency synthesizer with three mode loop filter charging

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6396890B1 (en) * 1998-07-17 2002-05-28 Motorola, Inc. Phase corrected frequency synthesizers
GB2357381A (en) * 1999-12-13 2001-06-20 Sony Uk Ltd Changing output frequency of a phase locked loop
JP2001339300A (en) * 2000-05-26 2001-12-07 Matsushita Electric Ind Co Ltd Pll frequency synthesizer
US20030034846A1 (en) * 2001-08-20 2003-02-20 Koninklijke Philips Electronics N.V. Frequency synthesizer with three mode loop filter charging

Also Published As

Publication number Publication date
GB0306674D0 (en) 2003-04-30
GB2399959A (en) 2004-09-29

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20110120 AND 20110126

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20170831 AND 20170906

PE20 Patent expired after termination of 20 years

Expiry date: 20230321