GB2319409B - Apparatus and method for stabilising the frequency of a phase locked loop - Google Patents

Apparatus and method for stabilising the frequency of a phase locked loop

Info

Publication number
GB2319409B
GB2319409B GB9623872A GB9623872A GB2319409B GB 2319409 B GB2319409 B GB 2319409B GB 9623872 A GB9623872 A GB 9623872A GB 9623872 A GB9623872 A GB 9623872A GB 2319409 B GB2319409 B GB 2319409B
Authority
GB
United Kingdom
Prior art keywords
stabilising
frequency
locked loop
phase locked
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
GB9623872A
Other versions
GB2319409A (en
GB9623872D0 (en
Inventor
Mark Sherlock
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Priority to GB9623872A priority Critical patent/GB2319409B/en
Publication of GB9623872D0 publication Critical patent/GB9623872D0/en
Priority to AU50528/98A priority patent/AU5052898A/en
Priority to PCT/FI1997/000691 priority patent/WO1998023034A2/en
Publication of GB2319409A publication Critical patent/GB2319409A/en
Application granted granted Critical
Publication of GB2319409B publication Critical patent/GB2319409B/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
    • H03L7/10—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
    • 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
GB9623872A 1996-11-15 1996-11-15 Apparatus and method for stabilising the frequency of a phase locked loop Expired - Fee Related GB2319409B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9623872A GB2319409B (en) 1996-11-15 1996-11-15 Apparatus and method for stabilising the frequency of a phase locked loop
AU50528/98A AU5052898A (en) 1996-11-15 1997-11-13 Apparatus and method for stabilising the frequency of a phase locked loop
PCT/FI1997/000691 WO1998023034A2 (en) 1996-11-15 1997-11-13 Apparatus and method for stabilising the frequency of a phase locked loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9623872A GB2319409B (en) 1996-11-15 1996-11-15 Apparatus and method for stabilising the frequency of a phase locked loop

Publications (3)

Publication Number Publication Date
GB9623872D0 GB9623872D0 (en) 1997-01-08
GB2319409A GB2319409A (en) 1998-05-20
GB2319409B true GB2319409B (en) 1999-01-27

Family

ID=10803058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9623872A Expired - Fee Related GB2319409B (en) 1996-11-15 1996-11-15 Apparatus and method for stabilising the frequency of a phase locked loop

Country Status (3)

Country Link
AU (1) AU5052898A (en)
GB (1) GB2319409B (en)
WO (1) WO1998023034A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2613589C (en) * 2006-12-04 2015-11-03 Its Electronics Inc. Floating dc-offset circuit for phase detector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527127A (en) * 1982-06-30 1985-07-02 Motorola Inc. Frequency acquisition circuit for phase locked loop
US5223772A (en) * 1992-02-28 1993-06-29 Sgs-Thomson Microelectronics, Inc. Method and apparatus for providing the lock of a phase-locked loop system from frequency sweep
GB2291548A (en) * 1993-03-08 1996-01-24 Nokia Telecommunications Oy Method of generating a clock signal by means of a phase-locked loop and a phase-locked loop

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2568110B2 (en) * 1988-07-15 1996-12-25 パイオニア株式会社 Phase locked loop circuit
US4987387A (en) * 1989-09-08 1991-01-22 Delco Electronics Corporation Phase locked loop circuit with digital control
US5382922A (en) * 1993-12-23 1995-01-17 International Business Machines Corporation Calibration systems and methods for setting PLL gain characteristics and center frequency
US5463352A (en) * 1994-09-23 1995-10-31 At&T Global Information Solutions Company Supply voltage tolerant phase-locked loop circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527127A (en) * 1982-06-30 1985-07-02 Motorola Inc. Frequency acquisition circuit for phase locked loop
US5223772A (en) * 1992-02-28 1993-06-29 Sgs-Thomson Microelectronics, Inc. Method and apparatus for providing the lock of a phase-locked loop system from frequency sweep
GB2291548A (en) * 1993-03-08 1996-01-24 Nokia Telecommunications Oy Method of generating a clock signal by means of a phase-locked loop and a phase-locked loop

Also Published As

Publication number Publication date
WO1998023034A2 (en) 1998-05-28
AU5052898A (en) 1998-06-10
GB2319409A (en) 1998-05-20
GB9623872D0 (en) 1997-01-08
WO1998023034A3 (en) 1998-07-30

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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)
PCNP Patent ceased through non-payment of renewal fee