ATE130946T1 - Pseudozufallszitterverfahren und zufallszitterverfahren gegen frequenzsynthese- rauschen. - Google Patents

Pseudozufallszitterverfahren und zufallszitterverfahren gegen frequenzsynthese- rauschen.

Info

Publication number
ATE130946T1
ATE130946T1 AT89901402T AT89901402T ATE130946T1 AT E130946 T1 ATE130946 T1 AT E130946T1 AT 89901402 T AT89901402 T AT 89901402T AT 89901402 T AT89901402 T AT 89901402T AT E130946 T1 ATE130946 T1 AT E130946T1
Authority
AT
Austria
Prior art keywords
digital
value
difference method
analog
random difference
Prior art date
Application number
AT89901402T
Other languages
English (en)
Inventor
Richard J Kerr
Lindsay A Weaver
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Application granted granted Critical
Publication of ATE130946T1 publication Critical patent/ATE130946T1/de

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06J—HYBRID COMPUTING ARRANGEMENTS
    • G06J1/00—Hybrid computing arrangements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
    • G06F1/0328—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2101/00—Indexing scheme relating to the type of digital function generated
    • G06F2101/04—Trigonometric functions
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/902—Spectral purity improvement for digital function generators by adding a dither signal, e.g. noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Evolutionary Computation (AREA)
  • Fuzzy Systems (AREA)
  • Automation & Control Theory (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Holo Graphy (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Manipulation Of Pulses (AREA)
AT89901402T 1987-12-14 1988-12-08 Pseudozufallszitterverfahren und zufallszitterverfahren gegen frequenzsynthese- rauschen. ATE130946T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/132,348 US4901265A (en) 1987-12-14 1987-12-14 Pseudorandom dither for frequency synthesis noise

Publications (1)

Publication Number Publication Date
ATE130946T1 true ATE130946T1 (de) 1995-12-15

Family

ID=22453607

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89901402T ATE130946T1 (de) 1987-12-14 1988-12-08 Pseudozufallszitterverfahren und zufallszitterverfahren gegen frequenzsynthese- rauschen.

Country Status (6)

Country Link
US (1) US4901265A (de)
EP (1) EP0390868B1 (de)
JP (1) JP2823913B2 (de)
AT (1) ATE130946T1 (de)
DE (1) DE3854744T2 (de)
WO (1) WO1989006009A1 (de)

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US5073869A (en) * 1989-08-25 1991-12-17 Titan Linkabit Corporation Suppression of spurious frequency components in direct digital frequency synthesizer
US4984186A (en) * 1989-08-25 1991-01-08 Titan Linkabit Corporation Phase accumulator with dithered incrementing of accumulation due to fine phase components
US4965531A (en) * 1989-11-22 1990-10-23 Carleton University Frequency synthesizers having dividing ratio controlled by sigma-delta modulator
US4998072A (en) * 1990-02-20 1991-03-05 John Fluke Mfg. Co., Inc. High resolution direct digital synthesizer
GB2242797B (en) * 1990-04-07 1993-12-08 Ferranti Int Plc Signal generation using digital-to-analogue conversion
GB9009722D0 (en) * 1990-05-01 1990-06-20 Crosfield Electronics Ltd Improvements relating to colour vignettes
US5019793A (en) * 1990-05-21 1991-05-28 Hughes Aircraft Company Digitally implemented variable phase shifter and amplitude weighting device
JPH0437205A (ja) * 1990-05-31 1992-02-07 Sony Corp 発振装置
US5202846A (en) * 1990-12-19 1993-04-13 Hughes Aircraft Company Prime number spur reduction for digital synthesis
US5495505A (en) * 1990-12-20 1996-02-27 Motorola, Inc. Increased frequency resolution in a synthesizer
US6034667A (en) * 1992-01-21 2000-03-07 Radius Inc. Method and apparatus for displaying YUV color information on a pseudo-color RGB display
US5331293A (en) * 1992-09-02 1994-07-19 Motorola, Inc. Compensated digital frequency synthesizer
JPH0763124B2 (ja) * 1993-02-24 1995-07-05 日本電気株式会社 直接デジタル周波数シンセサイザ
US5291428A (en) * 1993-03-02 1994-03-01 Harris Corporation Apparatus for reducing spurious frequency components in the output signal of a direct digital synthesizer
US5563596A (en) * 1994-06-10 1996-10-08 Steinbrecher Corporation Arrayed analog-to-digital converters
SE506694C2 (sv) * 1994-12-12 1998-02-02 Ericsson Telefon Ab L M Anordning och förfarande för reducering av oönskade frekvenskomponenter vid digital frekvensgenerering
US5602874A (en) * 1994-12-29 1997-02-11 Motorola, Inc. Method and apparatus for reducing quantization noise
US7929498B2 (en) * 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
ZA965340B (en) * 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US6885652B1 (en) * 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US7020111B2 (en) * 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
US7123600B2 (en) * 1995-06-30 2006-10-17 Interdigital Technology Corporation Initial power control for spread-spectrum communications
GB9616537D0 (en) * 1996-08-06 1996-09-25 Digi Media Vision Ltd Digital synthesiser
US20020051434A1 (en) * 1997-10-23 2002-05-02 Ozluturk Fatih M. Method for using rapid acquisition spreading codes for spread-spectrum communications
FI104768B (fi) * 1998-03-05 2000-03-31 Nokia Networks Oy Menetelmä häiriöiden vähentämiseksi ja syntetisaattorijärjestely
FR2780831B1 (fr) * 1998-07-03 2000-09-29 Thomson Csf Synthetiseur numerique de signaux
EP1164696B1 (de) * 1999-12-24 2008-04-23 Anritsu Corporation Wandergenerator und diesen enthaltender digitaler leitungsprüfer
US6388595B1 (en) * 2000-02-03 2002-05-14 Tektronix, Inc. Dithering apparatus to properly represent aliased signals for high speed signal sampling
US6522176B1 (en) 2001-11-15 2003-02-18 Itt Manufacturing Enterprises, Inc. Low spurious direct digital synthesizer
EP1811670B1 (de) 2003-04-02 2010-03-10 Christopher Julian Travis Numerisch gesteuerter Oszillator und Verfahren zum Erzeugen eines Ereignis-Taktes
DE10351604A1 (de) * 2003-11-05 2005-06-02 Rohde & Schwarz Gmbh & Co. Kg Frequenzsynthesizer nach dem direkten digitalen Synthese-Verfahren
DE10357033A1 (de) 2003-12-05 2005-06-30 Deutsche Thomson-Brandt Gmbh Aufzeichungs- und/oder Wiedergabegerät für optische Aufzeichnungsträger mit Mitteln zum Erhöhen der Auflösung eines Digital-Analog-Wandlers im Servoregelkreis
DE102004024645B4 (de) * 2004-05-18 2010-03-11 Infineon Technologies Ag Verfahren und Vorrichtung zur Reduzierung der Signalbilder am Ausgang eines Digital-Analog-Umsetzers
US7129753B2 (en) * 2004-05-26 2006-10-31 Infineon Technologies Ag Chip to chip interface
US7026846B1 (en) * 2004-07-09 2006-04-11 Analog Devices, Inc. Synthesizer structures and methods that reduce spurious signals
US7542620B1 (en) * 2004-08-16 2009-06-02 Apple Inc. Robust temporal dithering and filtering
US7933942B2 (en) * 2006-09-29 2011-04-26 Teradyne, Inc. Low cost, high purity sign wave generator
US7554471B2 (en) * 2006-11-01 2009-06-30 Northrop Grumman Corporation System and method for improving linearity of a DAC
US7561085B2 (en) * 2007-03-21 2009-07-14 Honeywell International Inc. Systems and methods for improving data converters
US7557619B1 (en) * 2008-03-10 2009-07-07 Xilinx, Inc. Digital frequency synthesis
KR101085107B1 (ko) * 2009-12-02 2011-11-21 (주)자람테크놀로지 가변 사인파 가중 디지털 아날로그 변환기를 이용한 직접 디지털 주파수 합성기 및 그 방법
US9416758B2 (en) 2012-12-21 2016-08-16 Ford Global Technologies, Llc Fuel filter
JP6463336B2 (ja) * 2014-03-12 2019-01-30 日本電波工業株式会社 周波数信号発生装置
RU2586006C1 (ru) * 2015-05-27 2016-06-10 Закрытое акционерное общество "ОКБ "РИТМ" Цифровой синтезатор шумовых сигналов

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US3633017A (en) * 1970-01-07 1972-01-04 Sperry Rand Corp Digital waveform generator
US3654450A (en) * 1970-04-03 1972-04-04 Joseph A Webb Digital signal generator synthesizer
US4328554A (en) * 1980-07-03 1982-05-04 The United States Of America As Represented By The Secretary Of The Navy Programmable frequency synthesizer (PFS)
US4410954A (en) * 1980-10-08 1983-10-18 Rockwell International Corporation Digital frequency synthesizer with random jittering for reducing discrete spectral spurs
US4454486A (en) * 1981-11-02 1984-06-12 Hewlett-Packard Company Waveform synthesis using multiplexed parallel synthesizers
US4476536A (en) * 1981-12-17 1984-10-09 International Business Machines Corporation Digital sine wave synthesizing method and apparatus
US4727506A (en) * 1985-03-25 1988-02-23 Rca Corporation Digital scaling circuitry with truncation offset compensation
US4652832A (en) * 1985-07-05 1987-03-24 Motorola, Inc. Frequency resolution in a digital oscillator
US5014231A (en) * 1987-11-23 1991-05-07 Hughes Aircraft Company Randomized digital/analog converter direct digital synthesizer

Also Published As

Publication number Publication date
WO1989006009A1 (en) 1989-06-29
JP2823913B2 (ja) 1998-11-11
DE3854744D1 (de) 1996-01-11
DE3854744T2 (de) 1996-08-08
EP0390868B1 (de) 1995-11-29
JPH04502092A (ja) 1992-04-09
EP0390868A1 (de) 1990-10-10
US4901265A (en) 1990-02-13
EP0390868A4 (en) 1992-03-11

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EELA Cancelled due to lapse of time