GB2097206B - Frequency synthesisers - Google Patents

Frequency synthesisers

Info

Publication number
GB2097206B
GB2097206B GB8112357A GB8112357A GB2097206B GB 2097206 B GB2097206 B GB 2097206B GB 8112357 A GB8112357 A GB 8112357A GB 8112357 A GB8112357 A GB 8112357A GB 2097206 B GB2097206 B GB 2097206B
Authority
GB
United Kingdom
Prior art keywords
frequency synthesisers
synthesisers
frequency
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
GB8112357A
Other versions
GB2097206A (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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB8112357A priority Critical patent/GB2097206B/en
Publication of GB2097206A publication Critical patent/GB2097206A/en
Application granted granted Critical
Publication of GB2097206B publication Critical patent/GB2097206B/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
    • H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
    • 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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect 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
    • H03L7/197—Indirect 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
    • H03L7/1974—Indirect 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
    • H03L7/1976—Indirect 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
GB8112357A 1981-04-21 1981-04-21 Frequency synthesisers Expired GB2097206B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8112357A GB2097206B (en) 1981-04-21 1981-04-21 Frequency synthesisers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8112357A GB2097206B (en) 1981-04-21 1981-04-21 Frequency synthesisers

Publications (2)

Publication Number Publication Date
GB2097206A GB2097206A (en) 1982-10-27
GB2097206B true GB2097206B (en) 1985-03-13

Family

ID=10521265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8112357A Expired GB2097206B (en) 1981-04-21 1981-04-21 Frequency synthesisers

Country Status (1)

Country Link
GB (1) GB2097206B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117198A (en) * 1982-03-19 1983-10-05 Philips Electronic Associated Frequency synthesiser
GB2150775A (en) * 1983-12-02 1985-07-03 Plessey Co Plc Frequency synthesiser
US4679005A (en) * 1985-01-23 1987-07-07 Sony Corporation Phase locked loop with frequency offset
GB2173659B (en) * 1985-02-06 1988-06-08 Plessey Co Plc Frequency synthesisers
GB2267401B (en) * 1985-06-22 1994-04-20 Int Standard Electric Corp Frequency synthesizer
DE3544371A1 (en) * 1985-12-14 1987-06-19 Wandel & Goltermann GENERATOR WITH DIGITAL FREQUENCY ADJUSTMENT
DE3635429A1 (en) * 1986-10-17 1988-04-21 Siemens Ag Phase-locked loop
GB2207311A (en) * 1987-07-24 1989-01-25 Case Group P L C Phase-locked loop systems
GB2228840B (en) * 1989-03-04 1993-02-10 Racal Dana Instr Ltd Frequency synthesisers
GB2233176A (en) * 1989-06-15 1991-01-02 Hiradastechnika Mech Lab Frequency synthesisers
SE465398B (en) * 1990-01-15 1991-09-02 Ericsson Telefon Ab L M PROCEDURE AND DEVICE FOR FREQUENCY SYNTHESIS
US5256981A (en) * 1992-02-27 1993-10-26 Hughes Aircraft Company Digital error corrected fractional-N synthesizer and method
US5307071A (en) * 1992-04-17 1994-04-26 Hughes Aircraft Company Low noise frequency synthesizer using half integer dividers and analog gain compensation
US6236275B1 (en) 1997-10-24 2001-05-22 Ericsson Inc. Digital frequency synthesis by sequential fraction approximations
EP1133060B1 (en) * 2000-03-10 2005-08-17 Koninklijke Philips Electronics N.V. Phase locked loop for generating a reference signal having a high spectral purity
DE60303187D1 (en) 2003-03-14 2006-04-06 St Microelectronics Srl Improvement of the method of compensating the phase error in a fractional-N phase locked loop frequency synthesizer

Also Published As

Publication number Publication date
GB2097206A (en) 1982-10-27

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Legal Events

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

Effective date: 19930421