Editing Direct digital synthesis (section)

==References==
<references>
<ref name="latticeSC">{{cite web|title=Numerically Controlled Oscillator
  |url=http://www.latticesemi.com/products/intellectualproperty/ipcores/numericallycontrolledosci/index.cfm
  |publisher=Lattice Semiconductor Corporation|year=2009}}</ref>
<ref name="AD_app">{{cite web|title=DDS Controls Waveforms in Test, Measurement, and Communications|url=http://www.analog.com/library/analogdialogue/archives/39-08/dds_apps.html|publisher=[[Analog Devices]] Corporation}}</ref>
<ref name="RFDesign July 2007">{{cite web
   |title=Direct digital synthesis enables digital PLLs
   |url=http://rfdesign.com/mag/707RFDF2.pdf
   |author=Paul Kern
   |publisher=RFDesign
   |date=July 2007
   |access-date=2010-01-15
   |archive-date=2012-04-05
   |archive-url=https://web.archive.org/web/20120405200808/http://rfdesign.com/mag/707RFDF2.pdf
   |url-status=dead
   }}</ref>  
<ref name="AD DDSvPLL">{{cite web|title=Single-Chip Direct Digital Synthesis vs. the Analog PLL
    |url=http://www.analog.com/library/analogDialogue/archives/30-3/single_chip.html
    |publisher=[[Analog Devices]] Corporation}}</ref>
<ref name="Chen">{{cite book|title=Introduction to Linear System Theory|author=Chen, C.T.|publisher=Holt, Rinehart and Winston, Inc.|year=1970|isbn=978-0-03-077155-2|url-access=registration|url=https://archive.org/details/introductiontoli00chen}}</ref>
</references>