DE69535233D1 - Rauschverminderung in digitalen Frequenzsynthetisierern - Google Patents

Rauschverminderung in digitalen Frequenzsynthetisierern

Info

Publication number
DE69535233D1
DE69535233D1 DE69535233T DE69535233T DE69535233D1 DE 69535233 D1 DE69535233 D1 DE 69535233D1 DE 69535233 T DE69535233 T DE 69535233T DE 69535233 T DE69535233 T DE 69535233T DE 69535233 D1 DE69535233 D1 DE 69535233D1
Authority
DE
Germany
Prior art keywords
noise reduction
digital frequency
frequency synthesizers
synthesizers
digital
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 - Lifetime
Application number
DE69535233T
Other languages
English (en)
Inventor
Philippe Roger Sadot
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.)
LSI Corp
Original Assignee
LSI Logic Corp
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 LSI Logic Corp filed Critical LSI Logic Corp
Application granted granted Critical
Publication of DE69535233D1 publication Critical patent/DE69535233D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/365—Modulation using digital generation of the modulated carrier (not including modulation of a digitally generated carrier)
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2092—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner with digital generation of the modulated carrier (does not include the modulation of a digitally generated carrier)
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
DE69535233T 1995-12-26 1995-12-26 Rauschverminderung in digitalen Frequenzsynthetisierern Expired - Lifetime DE69535233D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95402946A EP0782062B1 (de) 1995-12-26 1995-12-26 Rauschverminderung in digitalen Frequenzsynthetisierern

Publications (1)

Publication Number Publication Date
DE69535233D1 true DE69535233D1 (de) 2006-11-02

Family

ID=8221555

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69535233T Expired - Lifetime DE69535233D1 (de) 1995-12-26 1995-12-26 Rauschverminderung in digitalen Frequenzsynthetisierern

Country Status (3)

Country Link
US (1) US5864492A (de)
EP (1) EP0782062B1 (de)
DE (1) DE69535233D1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6459742B1 (en) * 1997-08-04 2002-10-01 Eads Defence And Security Networks Digital modulation process and modulator implementing the process
US6188253B1 (en) * 1998-10-07 2001-02-13 Robert Bruce Gage Analog clock module
GB9827363D0 (en) * 1998-12-14 1999-02-03 Philips Electronics Nv Transmitter
US6518801B1 (en) * 1999-08-05 2003-02-11 Agere Systems Inc. Alias suppression method for 1-bit precision direct digital synthesizer
US6333649B1 (en) * 2000-08-31 2001-12-25 Xilinx, Inc. Error feed-forward direct digital synthesis
GB0112639D0 (en) * 2001-05-23 2001-07-18 Lucas Industries Ltd Sinusoid synthesis
US7409012B2 (en) * 2001-07-06 2008-08-05 Motorola, Inc. Modulator and signaling method
US6897687B2 (en) * 2003-03-06 2005-05-24 Motorola, Inc. Method and apparatus for reconfigurable frequency generation
US7190288B2 (en) * 2003-06-27 2007-03-13 Northrop Grumman Corp. Look-up table delta-sigma conversion
US7577695B2 (en) * 2004-07-22 2009-08-18 Auburn University High-order delta-sigma noise shaping in direct digital frequency synthesis
CN103795345B (zh) * 2014-02-13 2016-08-17 深圳市汇顶科技股份有限公司 正弦波生成装置和方法
US9973360B2 (en) * 2015-12-18 2018-05-15 Nxp Usa, Inc. Method and apparatus for generating phase shift control signals

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410954A (en) * 1980-10-08 1983-10-18 Rockwell International Corporation Digital frequency synthesizer with random jittering for reducing discrete spectral spurs
US4815018A (en) * 1985-12-24 1989-03-21 Hughes Aircraft Company Spurless fractional divider direct digital frequency synthesizer and method
US5014231A (en) * 1987-11-23 1991-05-07 Hughes Aircraft Company Randomized digital/analog converter direct digital synthesizer
US4975699A (en) * 1989-12-01 1990-12-04 Hughes Aircraft Company Error reduction method and apparatus for a direct digital synthesizer
US5495505A (en) * 1990-12-20 1996-02-27 Motorola, Inc. Increased frequency resolution in a synthesizer
US5202642A (en) * 1991-05-09 1993-04-13 Iomega Corporation Apparatus and method for fractional frequency division
US5459680A (en) * 1993-10-20 1995-10-17 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method and apparatus for spur-reduced digital sinusoid synthesis
US5467294A (en) * 1994-03-09 1995-11-14 Hu; Vince High speed, low power direct digital synthesizer
US5513219A (en) * 1994-08-26 1996-04-30 Compaq Computer Corporation Apparatus and method for transmitting information with a subminimally modulated transmission signal
US5563535A (en) * 1994-11-29 1996-10-08 Microunity Systems Engineering, Inc. Direct digital frequency synthesizer using sigma-delta techniques

Also Published As

Publication number Publication date
EP0782062A1 (de) 1997-07-02
US5864492A (en) 1999-01-26
EP0782062B1 (de) 2006-09-20

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Legal Events

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