Return-to-zero (RZ) formatted data is recovered and transmitted using non-return-to-zero (NRZ) devices. A NRZ clock and data recovery device (CDR) interprets the clock rate of a RZ formatted signal as twice its actual clock rate. Due to this interpretation, extra zeroes will be inserted in the data stream....http://www.google.fr/patents/USRE41517?utm_source=gb-gplus-shareBrevet USRE41517 - Recovery and transmission of return-to-zero formatted data using non-return-to-zero devices
Recovery and transmission of return-to-zero formatted data using non-return ...