GB2370167B - Improvements in or relating to phase locked loops - Google Patents

Improvements in or relating to phase locked loops

Info

Publication number
GB2370167B
GB2370167B GB0030859A GB0030859A GB2370167B GB 2370167 B GB2370167 B GB 2370167B GB 0030859 A GB0030859 A GB 0030859A GB 0030859 A GB0030859 A GB 0030859A GB 2370167 B GB2370167 B GB 2370167B
Authority
GB
United Kingdom
Prior art keywords
relating
phase locked
locked loops
loops
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
GB0030859A
Other versions
GB0030859D0 (en
GB2370167A (en
Inventor
Michael Stephen Harwood
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.)
Texas Instruments Ltd
Original Assignee
Texas Instruments 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 Texas Instruments Ltd filed Critical Texas Instruments Ltd
Priority to GB0030859A priority Critical patent/GB2370167B/en
Publication of GB0030859D0 publication Critical patent/GB0030859D0/en
Publication of GB2370167A publication Critical patent/GB2370167A/en
Application granted granted Critical
Publication of GB2370167B publication Critical patent/GB2370167B/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
    • H03L7/08—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
    • H03L7/0893—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 the up-down pulses controlling at least two source current generators or at least two sink current generators connected to different points 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
    • H03L2207/04—Modifications for maintaining constant the phase-locked loop damping factor when other loop parameters change
    • 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
    • H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics 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
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
    • H03L7/0995—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator comprising a ring oscillator
GB0030859A 2000-12-18 2000-12-18 Improvements in or relating to phase locked loops Expired - Fee Related GB2370167B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0030859A GB2370167B (en) 2000-12-18 2000-12-18 Improvements in or relating to phase locked loops

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0030859A GB2370167B (en) 2000-12-18 2000-12-18 Improvements in or relating to phase locked loops

Publications (3)

Publication Number Publication Date
GB0030859D0 GB0030859D0 (en) 2001-01-31
GB2370167A GB2370167A (en) 2002-06-19
GB2370167B true GB2370167B (en) 2005-01-05

Family

ID=9905324

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0030859A Expired - Fee Related GB2370167B (en) 2000-12-18 2000-12-18 Improvements in or relating to phase locked loops

Country Status (1)

Country Link
GB (1) GB2370167B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466283A (en) * 2008-12-18 2010-06-23 Wolfson Microelectronics Plc Phase locked loop with controlled loop filter capacitance multiplier
US10784875B2 (en) 2018-12-23 2020-09-22 Texas Instruments Incorporated Loop filter for a phase-locked loop

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124047A (en) * 1982-07-10 1984-02-08 Plessey Co Plc Frequency synthesiser
JPS6260931A (en) * 1985-09-09 1987-03-17 Suzuki Motor Co Ltd Engine
EP0461358A1 (en) * 1990-06-15 1991-12-18 Mitsubishi Denki Kabushiki Kaisha Frequency synthesizer
GB2282285A (en) * 1993-08-13 1995-03-29 Nec Corp VCO; Frequency synthesizers
US5420545A (en) * 1993-03-10 1995-05-30 National Semiconductor Corporation Phase lock loop with selectable frequency switching time
EP0874463A2 (en) * 1997-04-25 1998-10-28 Matsushita Electric Industrial Co., Ltd. Multiband PLL frequency synthesizer
EP1005167A1 (en) * 1998-11-26 2000-05-31 SANYO ELECTRIC Co., Ltd. PLL synthesizer circuit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124047A (en) * 1982-07-10 1984-02-08 Plessey Co Plc Frequency synthesiser
JPS6260931A (en) * 1985-09-09 1987-03-17 Suzuki Motor Co Ltd Engine
EP0461358A1 (en) * 1990-06-15 1991-12-18 Mitsubishi Denki Kabushiki Kaisha Frequency synthesizer
US5420545A (en) * 1993-03-10 1995-05-30 National Semiconductor Corporation Phase lock loop with selectable frequency switching time
GB2282285A (en) * 1993-08-13 1995-03-29 Nec Corp VCO; Frequency synthesizers
EP0874463A2 (en) * 1997-04-25 1998-10-28 Matsushita Electric Industrial Co., Ltd. Multiband PLL frequency synthesizer
EP1005167A1 (en) * 1998-11-26 2000-05-31 SANYO ELECTRIC Co., Ltd. PLL synthesizer circuit

Also Published As

Publication number Publication date
GB0030859D0 (en) 2001-01-31
GB2370167A (en) 2002-06-19

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Legal Events

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

Effective date: 20161218