Ralf Ludewig Oliver Soffke Peter Zipf Manfred Glesner Kong-Pang Pun Kuen Hung Tsoi Kin-Hong Lee Philip Heng Wai Leong IP Generation for an FPGA-Based Audio DAC Sigma-Delta Converter. 526-535 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3203&spage=526 2004 conf/fpl/2004 FPL db/conf/fpl/fpl2004.html#LudewigSZGPTLL04