GB2107142B - Frequency synthesisers - Google Patents

Frequency synthesisers

Info

Publication number
GB2107142B
GB2107142B GB08130336A GB8130336A GB2107142B GB 2107142 B GB2107142 B GB 2107142B GB 08130336 A GB08130336 A GB 08130336A GB 8130336 A GB8130336 A GB 8130336A GB 2107142 B GB2107142 B GB 2107142B
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
GB08130336A
Other versions
GB2107142A (en
Inventor
Paul James Ince
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 GB08130336A priority Critical patent/GB2107142B/en
Publication of GB2107142A publication Critical patent/GB2107142A/en
Priority to BE0/212352A priority patent/BE898861A/en
Application granted granted Critical
Publication of GB2107142B publication Critical patent/GB2107142B/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
GB08130336A 1981-10-07 1981-10-07 Frequency synthesisers Expired GB2107142B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08130336A GB2107142B (en) 1981-10-07 1981-10-07 Frequency synthesisers
BE0/212352A BE898861A (en) 1981-10-07 1984-02-08 FREQUENCY SYNTHESIZER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08130336A GB2107142B (en) 1981-10-07 1981-10-07 Frequency synthesisers

Publications (2)

Publication Number Publication Date
GB2107142A GB2107142A (en) 1983-04-20
GB2107142B true GB2107142B (en) 1984-10-10

Family

ID=10525013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08130336A Expired GB2107142B (en) 1981-10-07 1981-10-07 Frequency synthesisers

Country Status (2)

Country Link
BE (1) BE898861A (en)
GB (1) GB2107142B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4568888A (en) * 1983-11-08 1986-02-04 Trw Inc. PLL Fast frequency synthesizer with memories for coarse tuning and loop gain correction
GB2150775A (en) * 1983-12-02 1985-07-03 Plessey Co Plc Frequency synthesiser
JPS61157028A (en) * 1984-12-28 1986-07-16 Fujitsu Ltd Frequency synthesizer
US4679005A (en) * 1985-01-23 1987-07-07 Sony Corporation Phase locked loop with frequency offset
US4926447A (en) * 1988-11-18 1990-05-15 Hewlett-Packard Company Phase locked loop for clock extraction in gigabit rate data communication links
FR2709624B1 (en) * 1993-08-31 1995-11-17 Sgs Thomson Microelectronics Frequency synthesizer.
US5907253A (en) * 1997-11-24 1999-05-25 National Semiconductor Corporation Fractional-N phase-lock loop with delay line loop having self-calibrating fractional delay element
US6064272A (en) * 1998-07-01 2000-05-16 Conexant Systems, Inc. Phase interpolated fractional-N frequency synthesizer with on-chip tuning
DE19840241C1 (en) * 1998-09-03 2000-03-23 Siemens Ag Digital PLL (Phase Locked Loop) frequency synthesizer
NZ335198A (en) * 1999-04-14 2000-11-24 Tait Electronics Ltd Cascaded sigma-delta modulators for fractional-N-division phase-lock-loop frequency systhesizer
JP3415574B2 (en) * 2000-08-10 2003-06-09 Ｎｅｃエレクトロニクス株式会社 PLL circuit
JP2002135116A (en) 2000-10-20 2002-05-10 Fujitsu Ltd Pll circuit and frequency-dividing method

Also Published As

Publication number Publication date
GB2107142A (en) 1983-04-20
BE898861A (en) 1984-05-30

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Legal Events

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

Effective date: 19931007