GB2323985B - Frequency tracking arrangments - Google Patents

Frequency tracking arrangments

Info

Publication number
GB2323985B
GB2323985B GB9804163A GB9804163A GB2323985B GB 2323985 B GB2323985 B GB 2323985B GB 9804163 A GB9804163 A GB 9804163A GB 9804163 A GB9804163 A GB 9804163A GB 2323985 B GB2323985 B GB 2323985B
Authority
GB
United Kingdom
Prior art keywords
arrangments
frequency tracking
tracking
frequency
tracking arrangments
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
GB9804163A
Other versions
GB2323985A (en
GB9804163D0 (en
Inventor
Trevor Peter Beatson
Nicholas Mihailovits
Patrick Brendan Fenney
David Ian Boddy
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.)
Microsemi Semiconductor Ltd
Original Assignee
Mitel Semiconductor 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
Priority claimed from GBGB9704719.5A external-priority patent/GB9704719D0/en
Application filed by Mitel Semiconductor Ltd filed Critical Mitel Semiconductor Ltd
Priority to GB9804163A priority Critical patent/GB2323985B/en
Publication of GB9804163D0 publication Critical patent/GB9804163D0/en
Publication of GB2323985A publication Critical patent/GB2323985A/en
Application granted granted Critical
Publication of GB2323985B publication Critical patent/GB2323985B/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
    • H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1291—Current or voltage controlled filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/16—Networks for phase shifting
    • H03H11/20—Two-port phase shifters providing an adjustable phase shift
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • 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
    • H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
    • H03L7/0812—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used
    • H03L7/0816—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used the controlled phase shifter and the frequency- or phase-detection arrangement being connected to a common input
GB9804163A 1997-03-07 1998-02-26 Frequency tracking arrangments Expired - Fee Related GB2323985B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9804163A GB2323985B (en) 1997-03-07 1998-02-26 Frequency tracking arrangments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9704719.5A GB9704719D0 (en) 1997-03-07 1997-03-07 Frequency tracking arrangements
GB9804163A GB2323985B (en) 1997-03-07 1998-02-26 Frequency tracking arrangments

Publications (3)

Publication Number Publication Date
GB9804163D0 GB9804163D0 (en) 1998-04-22
GB2323985A GB2323985A (en) 1998-10-07
GB2323985B true GB2323985B (en) 2001-09-05

Family

ID=26311136

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9804163A Expired - Fee Related GB2323985B (en) 1997-03-07 1998-02-26 Frequency tracking arrangments

Country Status (1)

Country Link
GB (1) GB2323985B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005328272A (en) * 2004-05-13 2005-11-24 Nec Electronics Corp Pll circuit and frequency setting circuit using the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1300392A (en) * 1969-10-24 1972-12-20 Marconi Instruments Ltd Improvements in or relating to adjustable frequency generator equipments and adaptors therefor
US4309649A (en) * 1978-09-07 1982-01-05 Trio Kabushiki Kaisha Phase synchronizer
GB2194402A (en) * 1986-07-18 1988-03-02 Toshiba Kk Automatic adjustment circuit for a filter
GB2197553A (en) * 1986-10-07 1988-05-18 Western Digital Corp Phase-locked loop delay line
US4782246A (en) * 1986-06-16 1988-11-01 Hitachi, Ltd. Phase shift circuit for electrical signal
US4958120A (en) * 1988-12-27 1990-09-18 Texas Instruments Incorporated Dual feedback tuning method and apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1300392A (en) * 1969-10-24 1972-12-20 Marconi Instruments Ltd Improvements in or relating to adjustable frequency generator equipments and adaptors therefor
US4309649A (en) * 1978-09-07 1982-01-05 Trio Kabushiki Kaisha Phase synchronizer
US4782246A (en) * 1986-06-16 1988-11-01 Hitachi, Ltd. Phase shift circuit for electrical signal
GB2194402A (en) * 1986-07-18 1988-03-02 Toshiba Kk Automatic adjustment circuit for a filter
GB2197553A (en) * 1986-10-07 1988-05-18 Western Digital Corp Phase-locked loop delay line
US4958120A (en) * 1988-12-27 1990-09-18 Texas Instruments Incorporated Dual feedback tuning method and apparatus

Also Published As

Publication number Publication date
GB2323985A (en) 1998-10-07
GB9804163D0 (en) 1998-04-22

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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)
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

Effective date: 20020226