GB0823146D0 - Phase locked loop - Google Patents

Phase locked loop

Info

Publication number
GB0823146D0
GB0823146D0 GBGB0823146.6A GB0823146A GB0823146D0 GB 0823146 D0 GB0823146 D0 GB 0823146D0 GB 0823146 A GB0823146 A GB 0823146A GB 0823146 D0 GB0823146 D0 GB 0823146D0
Authority
GB
United Kingdom
Prior art keywords
locked loop
phase locked
phase
loop
locked
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.)
Withdrawn
Application number
GBGB0823146.6A
Other versions
GB2466283A (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.)
Cirrus Logic International UK Ltd
Original Assignee
Wolfson Microelectronics PLC
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 Wolfson Microelectronics PLC filed Critical Wolfson Microelectronics PLC
Priority to GB0823146A priority Critical patent/GB2466283A/en
Publication of GB0823146D0 publication Critical patent/GB0823146D0/en
Publication of GB2466283A publication Critical patent/GB2466283A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/46—One-port networks
    • H03H11/48—One-port networks simulating reactances
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/46—One-port networks
    • H03H11/48—One-port networks simulating reactances
    • H03H11/483—Simulating capacitance multipliers
    • 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
    • H03L7/085—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
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
    • H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth
    • 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
GB0823146A 2008-12-18 2008-12-18 Phase locked loop with controlled loop filter capacitance multiplier Withdrawn GB2466283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0823146A GB2466283A (en) 2008-12-18 2008-12-18 Phase locked loop with controlled loop filter capacitance multiplier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0823146A GB2466283A (en) 2008-12-18 2008-12-18 Phase locked loop with controlled loop filter capacitance multiplier

Publications (2)

Publication Number Publication Date
GB0823146D0 true GB0823146D0 (en) 2009-01-28
GB2466283A GB2466283A (en) 2010-06-23

Family

ID=40343860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0823146A Withdrawn GB2466283A (en) 2008-12-18 2008-12-18 Phase locked loop with controlled loop filter capacitance multiplier

Country Status (1)

Country Link
GB (1) GB2466283A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107005244B (en) * 2017-02-08 2020-05-05 香港应用科技研究院有限公司 Gain calibration of direct modulation synthesizer using look-up table search by decreasing count of overflow counter
US9935640B1 (en) * 2017-02-08 2018-04-03 Hong Kong Applied Science and Technology Research Institute Company, Limited Gain calibration for direct modulation synthesizer using a look-up table searched by a reduced count from an overflow counter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08330998A (en) * 1995-06-02 1996-12-13 Sharp Corp Tuner device
US6057739A (en) * 1997-09-26 2000-05-02 Advanced Micro Devices, Inc. Phase-locked loop with variable parameters
JP3230501B2 (en) * 1998-11-12 2001-11-19 日本電気株式会社 Frequency synthesizer
GB2370167B (en) * 2000-12-18 2005-01-05 Texas Instruments Ltd Improvements in or relating to phase locked loops
KR100604983B1 (en) * 2004-06-14 2006-07-31 삼성전자주식회사 Capacitance multiplier for a pll loop filter
US7720189B2 (en) * 2006-11-09 2010-05-18 Applied Micro Circuits Corporation System and method for automatic clock frequency acquisition
US20080157865A1 (en) * 2006-12-29 2008-07-03 Smith Joe M Tunable capacitance multiplier circuit

Also Published As

Publication number Publication date
GB2466283A (en) 2010-06-23

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)