EP1171954A4 - Improvements relating to frequency synthesisers - Google Patents

Improvements relating to frequency synthesisers

Info

Publication number
EP1171954A4
EP1171954A4 EP20000917515 EP00917515A EP1171954A4 EP 1171954 A4 EP1171954 A4 EP 1171954A4 EP 20000917515 EP20000917515 EP 20000917515 EP 00917515 A EP00917515 A EP 00917515A EP 1171954 A4 EP1171954 A4 EP 1171954A4
Authority
EP
European Patent Office
Prior art keywords
improvements relating
frequency synthesisers
synthesisers
frequency
relating
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.)
Withdrawn
Application number
EP20000917515
Other languages
German (de)
French (fr)
Other versions
EP1171954A2 (en
Inventor
Stephen Ian Mann
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.)
Tait Electronics Ltd
Original Assignee
Tait Electronics 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 Tait Electronics Ltd filed Critical Tait Electronics Ltd
Publication of EP1171954A2 publication Critical patent/EP1171954A2/en
Publication of EP1171954A4 publication Critical patent/EP1171954A4/en
Withdrawn legal-status Critical Current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
    • H03L7/16—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
EP20000917515 1999-04-14 2000-04-14 Improvements relating to frequency synthesisers Withdrawn EP1171954A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ33519899A NZ335198A (en) 1999-04-14 1999-04-14 Cascaded sigma-delta modulators for fractional-N-division phase-lock-loop frequency systhesizer
NZ33519899 1999-04-14
PCT/NZ2000/000054 WO2000062428A2 (en) 1999-04-14 2000-04-14 Improvements relating to frequency synthesisers

Publications (2)

Publication Number Publication Date
EP1171954A2 EP1171954A2 (en) 2002-01-16
EP1171954A4 true EP1171954A4 (en) 2002-10-30

Family

ID=19927215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000917515 Withdrawn EP1171954A4 (en) 1999-04-14 2000-04-14 Improvements relating to frequency synthesisers

Country Status (6)

Country Link
EP (1) EP1171954A4 (en)
CN (1) CN1347591A (en)
AU (1) AU3847500A (en)
CA (1) CA2370254A1 (en)
NZ (3) NZ335198A (en)
WO (1) WO2000062428A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2403085B (en) * 2002-03-28 2005-09-07 Kaben Res Inc Phase error cancellation circuit and method for fractional frequency dividers and circuits incorporating same
US7072633B2 (en) * 2002-05-31 2006-07-04 Broadcom Corporation Double-conversion television tuner using a Delta-Sigma Fractional-N PLL
JP2004104228A (en) * 2002-09-05 2004-04-02 Matsushita Electric Ind Co Ltd Signal processing apparatus and signal processing method, delta sigma modulation fractional frequency division pll frequency synthesizer, wireless communication apparatus, and delta sigma modulation digital/analog converter
US6928127B2 (en) * 2003-03-11 2005-08-09 Atheros Communications, Inc. Frequency synthesizer with prescaler
GB2409383B (en) 2003-12-17 2006-06-21 Wolfson Ltd Clock synchroniser
WO2005096502A1 (en) 2004-04-02 2005-10-13 Kaben Research Inc. Multiple stage delta sigma modulators
CN1318212C (en) * 2004-07-30 2007-05-30 深圳市东方宇之光电子科技有限公司 Method and device for correcting geometric errors of images in laser phototypesetter
WO2011079471A1 (en) * 2009-12-31 2011-07-07 海能达通信股份有限公司 Method and system for optimizing fractional spurs

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107142A (en) * 1981-10-07 1983-04-20 Marconi Co Ltd Frequency synthesisers
US4609881A (en) * 1983-05-17 1986-09-02 Marconi Instruments Limited Frequency synthesizers
US5038117A (en) * 1990-01-23 1991-08-06 Hewlett-Packard Company Multiple-modulator fractional-N divider
US5093632A (en) * 1990-08-31 1992-03-03 Motorola, Inc. Latched accumulator fractional n synthesis with residual error reduction
WO1999008384A2 (en) * 1997-08-12 1999-02-18 Koninklijke Philips Electronics N.V. Multichannel radio device, a radio communication system, and a fractional division frequency synthesizer
US6348823B1 (en) * 1999-06-29 2002-02-19 Industrial Technology Research Institute Digital controlled oscillating circuit of digital phase lock loops
EP1184988A2 (en) * 2000-08-10 2002-03-06 Nec Corporation PLL circuit
US20020118074A1 (en) * 2000-09-29 2002-08-29 Fabrice Jovenin Low-noise and rapid response frequency synthesizer, and corresponding frequency synthesizing method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228840B (en) * 1989-03-04 1993-02-10 Racal Dana Instr Ltd Frequency synthesisers
US5055802A (en) * 1990-04-30 1991-10-08 Motorola, Inc. Multiaccumulator sigma-delta fractional-n synthesis
US6219397B1 (en) * 1998-03-20 2001-04-17 Samsung Electronics Co., Ltd. Low phase noise CMOS fractional-N frequency synthesizer for wireless communications

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107142A (en) * 1981-10-07 1983-04-20 Marconi Co Ltd Frequency synthesisers
US4609881A (en) * 1983-05-17 1986-09-02 Marconi Instruments Limited Frequency synthesizers
US5038117A (en) * 1990-01-23 1991-08-06 Hewlett-Packard Company Multiple-modulator fractional-N divider
US5093632A (en) * 1990-08-31 1992-03-03 Motorola, Inc. Latched accumulator fractional n synthesis with residual error reduction
WO1999008384A2 (en) * 1997-08-12 1999-02-18 Koninklijke Philips Electronics N.V. Multichannel radio device, a radio communication system, and a fractional division frequency synthesizer
US6348823B1 (en) * 1999-06-29 2002-02-19 Industrial Technology Research Institute Digital controlled oscillating circuit of digital phase lock loops
EP1184988A2 (en) * 2000-08-10 2002-03-06 Nec Corporation PLL circuit
US20020118074A1 (en) * 2000-09-29 2002-08-29 Fabrice Jovenin Low-noise and rapid response frequency synthesizer, and corresponding frequency synthesizing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0062428A3 *

Also Published As

Publication number Publication date
WO2000062428A2 (en) 2000-10-19
NZ507555A (en) 2002-10-25
EP1171954A2 (en) 2002-01-16
NZ335198A (en) 2000-11-24
CN1347591A (en) 2002-05-01
AU3847500A (en) 2000-11-14
WO2000062428A3 (en) 2001-11-01
NZ507556A (en) 2002-10-25
CA2370254A1 (en) 2000-10-19

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