BE898861A - Synthetiseur de frequences - Google Patents

Synthetiseur de frequences

Info

Publication number
BE898861A
BE898861A BE0/212352A BE212352A BE898861A BE 898861 A BE898861 A BE 898861A BE 0/212352 A BE0/212352 A BE 0/212352A BE 212352 A BE212352 A BE 212352A BE 898861 A BE898861 A BE 898861A
Authority
BE
Belgium
Prior art keywords
accumulator
frequency
wriggling
frequency synthesizer
division factor
Prior art date
Application number
BE0/212352A
Other languages
English (en)
Inventor
Paul J Ince
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
Publication of BE898861A publication Critical patent/BE898861A/fr

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

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

Synthétiseur de fréquences comportant un oscillateur (1), un diviseur de fréquences (5) variable et un comparateur de phase (6) disposé dans une boucle de réaction (3), la fréquence de sortie étant liée à une fréquence de référence, un accumulateur (9) et des moyens de compensation du frétillement. Le facteur de division est réglable et varie périodiquement d'une valeur égale à 3, lorsque l'accumulateur excède une valeur prédéterminée. Les moyens de compensation dérivent, de l'accumulateur, un signal de compensation du frétillement qui résulte des variations périodiques du facteur de division.
BE0/212352A 1981-10-07 1984-02-08 Synthetiseur de frequences BE898861A (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE898861A true BE898861A (fr) 1984-05-30

Family

ID=10525013

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/212352A BE898861A (fr) 1981-10-07 1984-02-08 Synthetiseur de frequences

Country Status (2)

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

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 (ja) * 1984-12-28 1986-07-16 Fujitsu Ltd 周波数シンセサイザ
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 (fr) * 1993-08-31 1995-11-17 Sgs Thomson Microelectronics Synthétiseur de fréquence.
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 (de) 1998-09-03 2000-03-23 Siemens Ag Digitaler PLL (Phase Locked Loop)-Frequenzsynthesizer
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 (ja) * 2000-08-10 2003-06-09 Ｎｅｃエレクトロニクス株式会社 Ｐｌｌ回路
JP2002135116A (ja) 2000-10-20 2002-05-10 Fujitsu Ltd Ｐｌｌ回路と分周方法

Also Published As

Publication number Publication date
GB2107142A (en) 1983-04-20
GB2107142B (en) 1984-10-10

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: THE MARCONI CY LTD

Effective date: 19940228