Single-chip surface-micromachined integrated gyroscope with 50/spl deg//hour root Allan variance

A MEMS surface-micromachined gyroscope integrated on a single 3/spl times/3 mm/sup 2/ chip with a 3 /spl mu/m BiCMOS process has 4 /spl mu/m-thick polysilicon structure, 5V 6 mA power supply, 0.05/spl deg///spl radic/s spot noise, 12.5 mV//spl deg//s, >30,000 g shock survival, and -55 to 85/spl deg/C operating range.