A 500 MHz 50 mW Viterbi detector for DVD systems using simplified ACS and new path memory architecture

A novel Viterbi detector has been developed for DVD Partial Response Maximum Likelihood (PRML) read channel systems. The Viterbi detector employs new calculation procedure of Add-Compare-Select (ACS) and new path memory architecture. A prototype chip has been fabricated in 0.18 /spl mu/m 1PS3AL CMOS technology, and the Viterbi detector demonstrates a half active area (0.156 mm/sup 2/) and power consumption (50 mW at 500 MHz) compared with conventional one.