DDS: background   |  numerical distortion   |  simulations (Mathcad)

* ASIC technologies: chips and modules *
 DDS ( DDFS, NCO ) links:
 
DDS: Direct Digital Synthesis = point(memory location)-skipping at constant update(clock)-rate  [ vs. traditional PPC (point-per-clock) synthesis at variable clock-rate ]
 DDFS: Direct Digital Frequency Synthesis
 NCO: Numerically Controlled Oscillator
 ASIC: Application-Specific Integrated Circuits
 FPGA: Field-Programmable Gate Array
 DAC: Digital to Analog Converter

Analog Devices - DDS info center
         http://www.analog.com/en/subCat/0,2879,770%255F843%255F0%255F%255F0%255F,00.html
         1 GSPS DDS - http://www.analog.com/en/prod/0,,AD9858,00.html
Fairchild (Raytheon Electronics) - Coordinate Transformer, Digital Synthesizer
         http://www.fairchildsemi.com/products/analog/tree_analog.html (Digital video processors)
      Logic Devices:
         http://www.logicdevices.com/ps/index.htm (Arithmetics Funtions)
Intel (Stanford Telecom) - Frequency Synthesis Products
         http://www.intel.com/design/digital/index.htm
       http://www.pentium.de/design/digital/index.htm
ITT Microwave Systems (Mw/Sys/Div of Stanford Telecom)
         http://www.ittmicrowave.com/ (Synthesizers)
Intersil (Harris Semi) - DSP Function-Specific ICs
         http://www.intersil.com/digital/
Osicom Technologies (Sciteq Com) - Synthesizers
        http://www.ehb.itu.edu.tr/~eepazarc/ddstutor.html  
Qualcomm - Direct Digital Synthesizers ( search : DDS - no result ...)
        http://www.cdmatech.com/index.html
TI acquires Graychip - Digital Tuners
         http://focus.ti.com/docs/analog/analoghomepage.jhtml (Wireless and Telecomm)
      Hunt Eng:
         http://www.hunteng.co.uk/howto/dds.htm
         http://www.hunteng.co.uk/howto/ddc.htm
      DDS using FPGA
        http://www.traquair.com/technology/fpga.html
Zarlink Semi (Mitel Semi | Plessey Semi)
         http://www.zarlink.com/index.htm (search: NCO)

~~~~~
Altera - NCO
        http://www.altera.com/index.html
        http://www.altera.com/products/ip/altera/t-alt-dds.html
Lattice Semi - NCO
       
http://www.latticesemi.com/
Mentor Graphics - NCO, DDS
        http://www.mentorg.com/products/
QuickLogic - Modulating DDS in an FPGA
        http://www.quicklogic.com/images/appnote19.pdf
Xilinx - Direct Digital Synthesizer LogiCORE
        Locator for IP Solutions
        CORE Generator and IP Updates
         http://www.xilinx.com/ipcenter/coregen/updates.htm
        Frequency Synthesis Techniques
       http://www.xilinx.com/xcell/xl31/xl31_32.pdf
        Numerically Controlled Oscillator
       http://www.xilinx.com/ipcenter/catalog/logicore/docs/dsp_nco_v1_0.pdf
 Free-LIB1 core (NCO)
        http://www.free-ip.com/lib1/

~~~~~
Anacad - Frequency Synthesis
         http://www.anacad.com/anglais/index.html#anacad_page1
APS - Programmable Direct Digital Synthesis Module
         http://www.associatedpro.com/aps/dds.htm
Herley-Metraplex - Oscillators & Synthesizers
         http://www.herley.com/index.cfm?act=prodsforfamily&fam=12
Novatech Instruments - DDS Signal Sources
         http://www.novatech-instr.com/
Philips - DDSGEN: a full-featured DDS-based generator (R. Lacoste)
         http://www.circuitcellar.com/design2k/winners/grand.htm
SpinCore Tech. - PulseBlasterDDS(tm)
         http://www.spincore.com/products/pbdds/
Texas - RF Transmitter Chip Integrates DDS
         http://www.ti.com/sc/docs/news/2000/00118.htm
         ISM Band Family (single-chip RF transmitter, RF transceiver)
Vitcom - DDS
         http://www.vitacomm.com/vt-100.html
*
Electronic Products Online (search : DDS, NCO)
        http://electronicproducts.com/default.asp

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Digital Frequency Synthesis Demystified (B. Goldberg)
    http://www.ebookstech.com/samples/LLH/dfsdSample.asp
Direct Digital Frequency Synthesizers (edited by F. Kroupa)
    http://shop.ieee.org/store/ (search: DDS)
Look-up table based frequency synthesizers
    http://digital.dmi.tut.fi/topics/frequency.html
SSS Online - DDS Stuff
    http://sss-mag.com/dds.html
Direct Digital Synthesis (M. Pechanec)
    http://www.geocities.com/CapeCanaveral/5611/dds.html
A Software Radio Bibliography: DDS
    http://www.softradios.com/bibliography.html
Pioneering EE Patents: Digital Signal Generator Synthesizer (J. Webb)
    http://eepatents.com/collection.html#015
Digital Frequency Synthesizer (R. Ottosen)
    http://www.brouhaha.com/~eric/ubicom/sxnco/
NCO using a microcontroller
    http://www.rhoent.com/examples.htm
Reducing of Spurious Frequencies in DDS (M. Hollreiser, L. Fanucci)
    http://esapub.esrin.esa.it/pff/pffv6n2/holv6n2.htm
Dynacs Engineering - Nonintrusive Impedance-Based Cable Tester
    http://technology.ksc.nasa.gov/WWWaccess/techreports/97report/07-EI/ei09.html
FPGA Implementation of Sine and Cosine Generators using the CORDIC Algorithm (Vladimirova/Tiggeler)
http://klabs.org/richcontent/MAPLDCon99/Abstracts/Vladimirova.PDF
DDFS using a modified Cordic (E. Grayer, B. Daneshrad)
http://www.ee.ucla.edu/~babak/publications/iscas98_ddfs.pdf
Hybrid sine function generator for low power DDFS (I. Janiszewski et al.)
http://www.fbe.fh-darmstadt.de/forschung/asic-ea/nco_elltr.pdf
An agile, low-power digitally synthesized sinewave generator (G. Chang et al.)
http://www.icsl.ucla.edu/aagroup/PDF_files/ddf-dac.pdf
Quadrature DDS with on chip DAC and LPF
    http://www.ecdl.hut.fi/~jvan/qdds5.html
DDFS - project
    http://vlsi2.kaist.ac.kr/project/ddfs.html
    http://hem.passagen.se/communication/dds.html
    http://www.myplace.nu/avr/minidds/index.htm   (a "poor-mans" DDS )
A PIC based DDS module
   
http://www.min.at/OE1RIB/DDS/SineDDS.htm
DDS - demo
    http://www.nomad.ee/soft/java/ddstest.html
DDS links
    http://www.nitehawk.com/rasmit/dds50.html

~~~~~
DDS-based (or PPC synthesised) ARBs - instruments
   Arbitrary Waveform Generators (AWG), Waveform Generators (WG),
   Arbitrary Function Generators (AFG), Synthesized Function Generators (SFG) or
   Function Generators (FG) ...
    pdf Choosing a waveform generator : the devil is in the details ( htm format)
     
AWG design - http://www.basilnetworks.com/article/awg/awg.html

   Agilent - http://www.tm.agilent.com/
        pdf Mathcad and HP (Agilent) BenchLink Generate Multisine Test Function (Zs. Papay)
        pdf Experiments in Gaussian White-noise generation (Zs. Papay)
    Analogic - http://www.analogic.com/Level3/Boardlevel.html
    BK Precision - http://www.bkprecision.com/
    BNC - http://www.berkeleynucleonics.com/smartarb/smartarb.htm
    Conex - http://www.conex-electro.com
        Compact audio frequency generator (RX-11)
    Fluke - http://www.fluke.com/ (Signal Sources)
    GW - http://www.goodwill.com.tw/Products/Menu_Generator_E.htm
    Geotest - http://www.geotestinc.com/ (DDS signal gen)
    Global Specialities - http://www.globalspecialties.com/2003.html
    Hameg - http://www.hameg.de/en/product/sys/hm8131.htm
    Int Data Sci - http://www.idsdata.com/m93spec.htm
    NI - http://www.ni.com/instruments/arbs/
    PC Instruments - http://www.pcinstruments.com
    Pragmatic - http://www.pragmatic.com/Product.html
        AWG - How it works
    PTS - http://www.programmedtest.com/
    Racal - http://www.racalinst.co.uk/pdf/index.htm#ss
    Ramsey - http://www.ramseyelectronics.com/   (RSG 1000)
    Signametrics - http://www.signametrics.com/
    SRS - http://www.thinksrs.com/
        What is Direct Digital Synthesis?
    Tecstar Electronics - http://www.tecstar.co.uk/tmi/   (FGA 2030)
    Tektronix - http://www.tek.com/Measurement/signal_sources/index.html
        XYZs of Signal Sources
    TTi - http://www.ttinst.co.uk/products-tti/generator/gen-summary.htm
    VXI Technology - http://www.vxitech.com/   (VM3640)
    Yokogawa - http://www.yokogawa.com/tm/
   *
    TMword - http://www.tmworld.com/index.htm
        ( PC-Based Instr/Cards  |  Stand-Alone Test Instr )
    TestMart - http://www.testmart.com/index.cfm
        (Function ArbitraryWaveform generators)


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