HK36397A - Latched accumulator fractional-N synthesis with reduced residual error - Google Patents

Latched accumulator fractional-N synthesis with reduced residual error

Info

Publication number
HK36397A
HK36397A HK36397A HK36397A HK36397A HK 36397 A HK36397 A HK 36397A HK 36397 A HK36397 A HK 36397A HK 36397 A HK36397 A HK 36397A HK 36397 A HK36397 A HK 36397A
Authority
HK
Hong Kong
Prior art keywords
synthesis
residual error
reduced residual
latched accumulator
accumulator fractional
Prior art date
Application number
HK36397A
Other languages
English (en)
Inventor
W Hietala Alexander
C Rabe Duane
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of HK36397A publication Critical patent/HK36397A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • 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
HK36397A 1990-08-31 1997-03-27 Latched accumulator fractional-N synthesis with reduced residual error HK36397A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/576,333 US5093632A (en) 1990-08-31 1990-08-31 Latched accumulator fractional n synthesis with residual error reduction
PCT/US1991/005924 WO1992004767A1 (en) 1990-08-31 1991-08-16 Latched accumulator fractional n synthesis with residual error reduction

Publications (1)

Publication Number Publication Date
HK36397A true HK36397A (en) 1997-04-04

Family

ID=24304000

Family Applications (1)

Application Number Title Priority Date Filing Date
HK36397A HK36397A (en) 1990-08-31 1997-03-27 Latched accumulator fractional-N synthesis with reduced residual error

Country Status (19)

Country Link
US (1) US5093632A (es)
JP (1) JP2750639B2 (es)
KR (1) KR960012653B1 (es)
AT (1) AT402246B (es)
AU (1) AU646304B2 (es)
BR (1) BR9105884A (es)
CA (1) CA2065857C (es)
DE (2) DE4192071C2 (es)
DK (1) DK54992A (es)
ES (1) ES2088715B1 (es)
FI (1) FI108381B (es)
FR (1) FR2666463B1 (es)
GB (1) GB2253752B (es)
HK (1) HK36397A (es)
IE (1) IE67055B1 (es)
IT (1) IT1250770B (es)
MX (1) MX9100851A (es)
SE (1) SE469917B (es)
WO (1) WO1992004767A1 (es)

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US5701598A (en) * 1990-09-14 1997-12-23 Atkinson; Noel D. Scanning receiver with direct digital frequency synthesis and digital signal processing
US5111162A (en) * 1991-05-03 1992-05-05 Motorola, Inc. Digital frequency synthesizer having AFC and modulation applied to frequency divider
JP2857292B2 (ja) * 1991-12-18 1999-02-17 ゼロックス コーポレイション ２次元デジタルフィルタを実現するための装置
US5256981A (en) * 1992-02-27 1993-10-26 Hughes Aircraft Company Digital error corrected fractional-N synthesizer and method
US5436937A (en) * 1993-02-01 1995-07-25 Motorola, Inc. Multi-mode digital phase lock loop
US5347234A (en) * 1993-03-26 1994-09-13 International Business Machines Corp. Digital voltage controlled oscillator
US5337024A (en) * 1993-06-22 1994-08-09 Rockwell International Corporation Phase locked loop frequency modulator using fractional division
FR2709624B1 (fr) * 1993-08-31 1995-11-17 Sgs Thomson Microelectronics Synthétiseur de fréquence.
US5493700A (en) * 1993-10-29 1996-02-20 Motorola Automatic frequency control apparatus
US5495206A (en) * 1993-10-29 1996-02-27 Motorola, Inc. Fractional N frequency synthesis with residual error correction and method thereof
US5448763A (en) * 1993-11-09 1995-09-05 Motorola Apparatus and method for operating a phase locked loop frequency synthesizer responsive to radio frequency channel spacing
US5463351A (en) * 1994-09-29 1995-10-31 Motorola, Inc. Nested digital phase lock loop
JP3319677B2 (ja) * 1995-08-08 2002-09-03 三菱電機株式会社 周波数シンセサイザ
FI100285B (fi) * 1995-12-11 1997-10-31 Nokia Mobile Phones Ltd Taajuudenmuodostuspiiri
US5745848A (en) * 1996-03-04 1998-04-28 Motorola, Inc. Method and apparatus for eliminating interference caused by spurious signals in a communication device
US6032028A (en) * 1996-04-12 2000-02-29 Continentral Electronics Corporation Radio transmitter apparatus and method
US6011815A (en) * 1997-09-16 2000-01-04 Telefonaktiebolaget Lm Ericsson Compensated ΔΣ controlled phase locked loop modulator
US6047029A (en) * 1997-09-16 2000-04-04 Telefonaktiebolaget Lm Ericsson Post-filtered delta sigma for controlling a phase locked loop modulator
NZ335198A (en) * 1999-04-14 2000-11-24 Tait Electronics Ltd Cascaded sigma-delta modulators for fractional-N-division phase-lock-loop frequency systhesizer
US6581082B1 (en) * 2000-02-22 2003-06-17 Rockwell Collins Reduced gate count differentiator
US6747987B1 (en) 2000-02-29 2004-06-08 Motorola, Inc. Transmit modulation circuit and method of operating a transmitter
US6278333B1 (en) 2000-02-29 2001-08-21 Motorola, Inc. Phase lock loop with dual state charge pump and method of operating the same
US6564039B1 (en) 2000-02-29 2003-05-13 Motorola, Inc. Frequency generation circuit and method of operating a tranceiver
US6347233B1 (en) 2000-05-12 2002-02-12 Motorola, Inc. Digital waveform generator apparatus and method therefor
KR100346839B1 (ko) 2000-10-10 2002-08-03 삼성전자 주식회사 시그마-델타 변조기를 이용한 분수-ｎ 주파수 합성 장치및 그 방법
US6385276B1 (en) 2001-06-12 2002-05-07 Rf Micro Devices, Inc. Dual-modulus prescaler
US6779010B2 (en) 2001-06-12 2004-08-17 Rf Micro Devices, Inc. Accumulator with programmable full-scale range
US6693468B2 (en) 2001-06-12 2004-02-17 Rf Micro Devices, Inc. Fractional-N synthesizer with improved noise performance
US7003049B2 (en) * 2001-06-12 2006-02-21 Rf Micro Devices, Inc. Fractional-N digital modulation with analog IQ interface
US6448831B1 (en) 2001-06-12 2002-09-10 Rf Micro Devices, Inc. True single-phase flip-flop
US6710951B1 (en) * 2001-10-31 2004-03-23 Western Digital Technologies, Inc. Phase locked loop employing a fractional frequency synthesizer as a variable oscillator
DE60314020T2 (de) * 2003-11-28 2007-09-13 Fujitsu Ltd., Kawasaki Sd-modulator einer pll-schaltung
US7482885B2 (en) * 2005-12-29 2009-01-27 Orca Systems, Inc. Method of frequency synthesis for fast switching
US7519349B2 (en) * 2006-02-17 2009-04-14 Orca Systems, Inc. Transceiver development in VHF/UHF/GSM/GPS/bluetooth/cordless telephones
US8193845B2 (en) 2010-07-06 2012-06-05 Microchip Technology Incorporated Binary-weighted delta-sigma fractional-N frequency synthesizer with digital-to-analog differentiators canceling quantization noise

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US3882403A (en) * 1974-03-14 1975-05-06 Gen Dynamics Corp Digital frequency synthesizer
US3928813A (en) * 1974-09-26 1975-12-23 Hewlett Packard Co Device for synthesizing frequencies which are rational multiples of a fundamental frequency
GB1560233A (en) * 1977-02-02 1980-01-30 Marconi Co Ltd Frequency synthesisers
GB2026268B (en) * 1978-07-22 1982-07-28 Racal Communcations Equipment Frequency synthesizers
GB2091960B (en) * 1981-01-27 1985-06-19 Int Standard Electric Corp High speed frequency synthesizer
FR2511564A1 (fr) * 1981-08-17 1983-02-18 Thomson Csf Synthetiseur de frequences a division fractionnaire, utilise pour une modulation angulaire numerique
GB2140232B (en) * 1983-05-17 1986-10-29 Marconi Instruments Ltd Frequency synthesisers
FR2557401B1 (fr) * 1983-12-27 1986-01-24 Thomson Csf Synthetiseur de frequences a division fractionnaire, a faible gigue de phase et utilisation de ce synthetiseur
EP0211921A1 (en) * 1985-02-21 1987-03-04 Plessey Overseas Limited Improvement in or relating to synthesisers
JPS62502230A (ja) * 1985-02-21 1987-08-27 シーメンス　プレッシー　エレクトロニック　システムズ　リミテッド 周波数合成器またはそれに関する改良
DE3544371A1 (de) * 1985-12-14 1987-06-19 Wandel & Goltermann Generator mit digitaler frequenzeinstellung
US4815018A (en) * 1985-12-24 1989-03-21 Hughes Aircraft Company Spurless fractional divider direct digital frequency synthesizer and method
US4810977A (en) * 1987-12-22 1989-03-07 Hewlett-Packard Company Frequency modulation in phase-locked loops
AU617455B2 (en) * 1988-05-06 1991-11-28 Alcatel N.V. A digital frequency synthesizer
US4816774A (en) * 1988-06-03 1989-03-28 Motorola, Inc. Frequency synthesizer with spur compensation
DE3826006C1 (es) * 1988-07-30 1989-10-12 Wandel & Goltermann Gmbh & Co, 7412 Eningen, De
US4918405A (en) * 1988-10-26 1990-04-17 Hewlett-Packard Company Signal generator utilizing a combined phase locked and frequency locked loop
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US5055800A (en) * 1990-04-30 1991-10-08 Motorola, Inc. Fractional n/m synthesis
US5055802A (en) * 1990-04-30 1991-10-08 Motorola, Inc. Multiaccumulator sigma-delta fractional-n synthesis

Also Published As

Publication number Publication date
AU8710991A (en) 1992-03-30
ATA900591A (de) 1996-07-15
BR9105884A (pt) 1992-11-03
ITRM910652A1 (it) 1992-03-01
SE9201351L (sv) 1992-06-22
JPH05503827A (ja) 1993-06-17
GB2253752B (en) 1994-11-23
ITRM910652A0 (it) 1991-08-30
IT1250770B (it) 1995-04-21
GB2253752A (en) 1992-09-16
AU646304B2 (en) 1994-02-17
ES2088715A1 (es) 1996-08-16
FI921959A0 (fi) 1992-04-30
GB9209236D0 (en) 1992-06-24
CA2065857A1 (en) 1992-03-01
KR960012653B1 (ko) 1996-09-23
US5093632A (en) 1992-03-03
FR2666463A1 (fr) 1992-03-06
FI921959A (fi) 1992-04-30
WO1992004767A1 (en) 1992-03-19
IE67055B1 (en) 1996-02-21
KR920702571A (ko) 1992-09-04
SE9201351D0 (sv) 1992-04-29
CA2065857C (en) 1998-04-28
IE913060A1 (en) 1992-03-11
ES2088715B1 (es) 1997-02-16
DK54992D0 (da) 1992-04-28
FR2666463B1 (fr) 1994-02-04
DE4192071C2 (de) 1996-02-22
AT402246B (de) 1997-03-25
SE469917B (sv) 1993-10-04
DK54992A (da) 1992-04-28
DE4192071T (es) 1992-08-27
JP2750639B2 (ja) 1998-05-13
FI108381B (fi) 2002-01-15
MX9100851A (es) 1992-08-10

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)