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GB2217535B - Digital circuit arrangement - Google Patents

Digital circuit arrangement

Info

Publication number
GB2217535B
GB2217535B GB8828947A GB8828947A GB2217535B GB 2217535 B GB2217535 B GB 2217535B GB 8828947 A GB8828947 A GB 8828947A GB 8828947 A GB8828947 A GB 8828947A GB 2217535 B GB2217535 B GB 2217535B
Authority
GB
Grant status
Grant
Patent type
Prior art keywords
digital
circuit
arrangement
digital circuit
circuit arrangement
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
GB8828947A
Other versions
GB8828947D0 (en )
GB2217535A (en )
Inventor
Brian R Gardner
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.)
Racal Research Ltd
RACAL RES Ltd
Original Assignee
* RACAL RESEARCH LIMITED
RACAL RES 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
Grant date

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00Automatic control of frequency or phase; Synchronisation
    • H03L7/06Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08Details of the phase-locked loop
    • H03L7/081Details of the phase-locked loop provided with an additional controlled phase shifter
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00Automatic control of frequency or phase; Synchronisation
    • H03L7/06Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18Indirect 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
    • H03L7/197Indirect 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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974Indirect 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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
    • H03L7/1976Indirect 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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division using a phase accumulator for controlling the counter or frequency divider
GB8828947A 1988-04-15 1988-12-12 Digital circuit arrangement Expired - Fee Related GB2217535B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8808982 1988-04-15

Publications (3)

Publication Number Publication Date
GB8828947D0 GB8828947D0 (en) 1989-01-25
GB2217535A true GB2217535A (en) 1989-10-25
GB2217535B true GB2217535B (en) 1992-12-16

Family

ID=10635281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8828947A Expired - Fee Related GB2217535B (en) 1988-04-15 1988-12-12 Digital circuit arrangement

Country Status (1)

Country Link
GB (1) GB2217535B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166642A (en) * 1992-02-18 1992-11-24 Motorola, Inc. Multiple accumulator fractional N synthesis with series recombination
FR2705002B1 (en) * 1993-05-07 1995-06-23 Thomson Csf Method and device for generation of a control signal frequency.
US5495206A (en) * 1993-10-29 1996-02-27 Motorola, Inc. Fractional N frequency synthesis with residual error correction and method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195482A1 (en) * 1985-03-20 1986-09-24 Philips Electronics N.V. Recursive first order digital video signal filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195482A1 (en) * 1985-03-20 1986-09-24 Philips Electronics N.V. Recursive first order digital video signal filter

Also Published As

Publication number Publication date Type
GB8828947D0 (en) 1989-01-25 grant
GB2217535A (en) 1989-10-25 application

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Legal Events

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

Effective date: 20041212