GB9318893D0 - Digitally controlled phase locked loop - Google Patents

Digitally controlled phase locked loop

Info

Publication number
GB9318893D0
GB9318893D0 GB939318893A GB9318893A GB9318893D0 GB 9318893 D0 GB9318893 D0 GB 9318893D0 GB 939318893 A GB939318893 A GB 939318893A GB 9318893 A GB9318893 A GB 9318893A GB 9318893 D0 GB9318893 D0 GB 9318893D0
Authority
GB
United Kingdom
Prior art keywords
locked loop
phase locked
digitally controlled
controlled phase
digitally
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
GB939318893A
Other versions
GB2282719A (en
GB2282719B (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.)
Commscope Connectivity LLC
Original Assignee
ADC Telecommunications 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 ADC Telecommunications Inc filed Critical ADC Telecommunications Inc
Priority to GB9318893A priority Critical patent/GB2282719B/en
Publication of GB9318893D0 publication Critical patent/GB9318893D0/en
Publication of GB2282719A publication Critical patent/GB2282719A/en
Application granted granted Critical
Publication of GB2282719B publication Critical patent/GB2282719B/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
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted
    • H03L7/146—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by using digital means for generating the oscillator control 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
    • H03L7/07—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop using several loops, e.g. for redundant clock signal generation
    • 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
    • H03L7/091—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 using a sampling device
    • 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
    • H03L7/08—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
    • H04J3/0688—Change of the master or reference, e.g. take-over or failure of the master
GB9318893A 1993-09-13 1993-09-13 Digitally controlled phase locked loop Expired - Fee Related GB2282719B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9318893A GB2282719B (en) 1993-09-13 1993-09-13 Digitally controlled phase locked loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9318893A GB2282719B (en) 1993-09-13 1993-09-13 Digitally controlled phase locked loop

Publications (3)

Publication Number Publication Date
GB9318893D0 true GB9318893D0 (en) 1993-10-27
GB2282719A GB2282719A (en) 1995-04-12
GB2282719B GB2282719B (en) 1998-04-22

Family

ID=10741893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9318893A Expired - Fee Related GB2282719B (en) 1993-09-13 1993-09-13 Digitally controlled phase locked loop

Country Status (1)

Country Link
GB (1) GB2282719B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726607A (en) * 1992-06-15 1998-03-10 Adc Telecommunications, Inc. Phase locked loop using a counter and a microcontroller to produce VCXO control signals
DK132895A (en) * 1995-11-24 1997-05-25 Dsc Communications As Method for controlling a digital phase-locked circuit and a digital phase-locked circuit with a voltage controlled oscillator
CA2184013A1 (en) * 1996-08-23 1998-02-24 Mauricio Peres Hitless clock recovery in atm networks
US5870001A (en) * 1996-10-22 1999-02-09 Telefonaktiebolaget L M Ericsson (Publ) Apparatus, and associated method, for calibrating a device
SE518287C2 (en) * 2001-01-26 2002-09-17 Ericsson Telefon Ab L M Device for trimming an oscillator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587496A (en) * 1984-09-12 1986-05-06 General Signal Corporation Fast acquisition phase-lock loop
GB2267617B (en) * 1985-04-15 1994-04-27 Int Standard Electric Corp A digital sample and hold phase detector

Also Published As

Publication number Publication date
GB2282719A (en) 1995-04-12
GB2282719B (en) 1998-04-22

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Legal Events

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

Effective date: 20030913