GB2132042B - Frequency and timing sources - Google Patents

Frequency and timing sources

Info

Publication number
GB2132042B
GB2132042B GB08333406A GB8333406A GB2132042B GB 2132042 B GB2132042 B GB 2132042B GB 08333406 A GB08333406 A GB 08333406A GB 8333406 A GB8333406 A GB 8333406A GB 2132042 B GB2132042 B GB 2132042B
Authority
GB
United Kingdom
Prior art keywords
frequency
timing sources
timing
sources
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
Application number
GB08333406A
Other versions
GB8333406D0 (en
GB2132042A (en
Inventor
John Philip Chambers
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting Corp
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 British Broadcasting Corp filed Critical British Broadcasting Corp
Priority to GB08333406A priority Critical patent/GB2132042B/en
Publication of GB8333406D0 publication Critical patent/GB8333406D0/en
Publication of GB2132042A publication Critical patent/GB2132042A/en
Application granted granted Critical
Publication of GB2132042B publication Critical patent/GB2132042B/en
Expired 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
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
    • H03L7/0991—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider
    • H03L7/0992—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider comprising a counter or a frequency divider
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
    • H03L1/026—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using a memory for digitally storing correction values
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
    • H03L1/027—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using frequency conversion means which is variable with temperature, e.g. mixer, frequency divider, pulse add/substract logic circuit
GB08333406A 1982-12-15 1983-12-15 Frequency and timing sources Expired GB2132042B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08333406A GB2132042B (en) 1982-12-15 1983-12-15 Frequency and timing sources

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8235774 1982-12-15
GB08333406A GB2132042B (en) 1982-12-15 1983-12-15 Frequency and timing sources

Publications (3)

Publication Number Publication Date
GB8333406D0 GB8333406D0 (en) 1984-01-25
GB2132042A GB2132042A (en) 1984-06-27
GB2132042B true GB2132042B (en) 1986-09-24

Family

ID=26284697

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08333406A Expired GB2132042B (en) 1982-12-15 1983-12-15 Frequency and timing sources

Country Status (1)

Country Link
GB (1) GB2132042B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8427378D0 (en) * 1984-10-30 1984-12-05 Helsby N C Frequency standards
WO1990016113A1 (en) * 1989-06-22 1990-12-27 Advanced Systems Research Pty Limited Self-calibrating temperature-compensated frequency source
FR2737626B1 (en) * 1995-07-31 1997-09-05 Sgs Thomson Microelectronics DEVICE AND METHOD FOR ADJUSTING THE TUNING FREQUENCY OF A PLL DEMODULATOR
JP2984614B2 (en) * 1997-01-24 1999-11-29 日本電気アイシーマイコンシステム株式会社 Intermittent reception system for mobile communication devices
AU728239B2 (en) * 1997-04-07 2001-01-04 Benq Mobile Gmbh & Co. Ohg Digital AFC adjustment by means of reciprocal direct digital synthesis
SI0961411T1 (en) * 1998-05-28 2005-02-28 Landis+Gyr Ag Procedure for deriving a clock frequency
GB2360404B (en) 2000-03-17 2004-03-10 Ericsson Telefon Ab L M Electronic circuit
GB2450680B (en) * 2007-06-22 2012-05-30 Ubiquisys Ltd Controlling timing of synchronization updates

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762746A1 (en) * 1967-08-21 1970-08-20 Synchron Druzstov Pro Vyvoj A Method for syntonizing precise oscillators and the arrangement for performing this method
CH566089A5 (en) * 1973-12-20 1975-08-29 Hasler Ag
GB1456453A (en) * 1974-01-31 1976-11-24 Ibm Phase locked oscillators
US4122488A (en) * 1976-05-10 1978-10-24 Nippon Television Industry Corporation Sync signal generator with memorization of phase detection output
FR2448257A1 (en) * 1979-02-05 1980-08-29 Trt Telecom Radio Electr DEVICE FOR FAST RESYNCHRONIZATION OF A CLOCK
CH625670B (en) * 1980-01-10 Suisse Horlogerie OSCILLATOR WITH DIGITAL TEMPERATURE COMPENSATION.
GB2086159A (en) * 1980-10-22 1982-05-06 Philips Electronic Associated Automatic frequency control system
US4424497A (en) * 1981-04-30 1984-01-03 Monolithic Systems Corporation System for phase locking clock signals to a frequency encoded data stream

Also Published As

Publication number Publication date
GB8333406D0 (en) 1984-01-25
GB2132042A (en) 1984-06-27

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Legal Events

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

Effective date: 19941215