A plurality of pseudo random bit-pattern generators (PRPGs), advantageously linear feedback shift registers (LFSRs), having predetermined lengths and individual different tap locations for providing a respective sequence of pseudorandom bit-patterns. An output from a predetermined respective tap location...http://www.google.com.hk/patents/US6983407?utm_source=gb-gplus-share專利 US6983407 - Random pattern weight control by pseudo random bit pattern generator initialization
