Sierra Semiconductor Inc has reported fourth quarter net profits down 72% at $600,000 on turnover that fell 14% to $19.1m; net losses for the year to January 2 were $13.0m, including a restructuring charge of $12.7m, against profits last time of $11.9m, on turnover that fell 9.7% to $83.4m. Net per share fell 68% to $0.06 in the quarter.