3.0 V 40 Mbit/s Hard Disk Drive Read Channel Combo

A high performance low power BiCMOS 3.0 - 5.5 V mixed signal ASIC integrating the complete hard disk drive read channel electronics is presented. The IC includes the automatic gain control, programmable continuous-time filter, pulse qualifier, servo demodulator, time base generator, data synchronizer and encoder/decoder. It supports constant density recording at 14-40 Mbit/s data rates in 1,7 RLL format and embedded 4-burst servo. Nominal power dissipation at 3.0 V supply and 40 Mbit/s data rate is 360 mW. Pulse pairing and write data jitter both measured only 300 ps.