GB9618986D0 - Improvements in or relating to phase locked loops - Google Patents

Improvements in or relating to phase locked loops

Info

Publication number
GB9618986D0
GB9618986D0 GBGB9618986.5A GB9618986A GB9618986D0 GB 9618986 D0 GB9618986 D0 GB 9618986D0 GB 9618986 A GB9618986 A GB 9618986A GB 9618986 D0 GB9618986 D0 GB 9618986D0
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.)
Withdrawn
Application number
GBGB9618986.5A
Other versions
GB2317280A (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.)
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 GB9618986A priority Critical patent/GB2317280A/en
Publication of GB9618986D0 publication Critical patent/GB9618986D0/en
Publication of GB2317280A publication Critical patent/GB2317280A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB9618986A 1996-09-11 1996-09-11 Bandwidth adjustment in phase locked loops Withdrawn GB2317280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9618986A GB2317280A (en) 1996-09-11 1996-09-11 Bandwidth adjustment in phase locked loops

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9618986A GB2317280A (en) 1996-09-11 1996-09-11 Bandwidth adjustment in phase locked loops

Publications (2)

Publication Number Publication Date
GB9618986D0 true GB9618986D0 (en) 1996-10-23
GB2317280A GB2317280A (en) 1998-03-18

Family

ID=10799781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9618986A Withdrawn GB2317280A (en) 1996-09-11 1996-09-11 Bandwidth adjustment in phase locked loops

Country Status (1)

Country Link
GB (1) GB2317280A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004052416B4 (en) * 2004-10-28 2012-05-10 Infineon Technologies Ag Loop filter
US7696829B2 (en) * 2006-09-21 2010-04-13 Infineon Technologies Ag Frequency synthesizer and method
EP2009796A1 (en) * 2007-06-28 2008-12-31 Alcatel Lucent Method for filtering a signal in a phase-locked loop, phase locked loop, base station and communication network therefor
GB0800251D0 (en) 2008-01-08 2008-02-13 Zarlink Semiconductor Inc Phase locked loop with adaptive filter for dco synchronization
WO2009156450A1 (en) * 2008-06-27 2009-12-30 Thomson Licensing Temporal adjustment of the cut-off frequency of a packet reception device connected to a network

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI93286C (en) * 1993-03-08 1995-03-10 Nokia Telecommunications Oy Method of forming a clock signal with a phase-locked loop and phase-locked loop
CA2130871C (en) * 1993-11-05 1999-09-28 John M. Alder Method and apparatus for a phase-locked loop circuit with holdover mode

Also Published As

Publication number Publication date
GB2317280A (en) 1998-03-18

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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)