SIGMA-DELTA TYPE ANALOG-TO-DIGITAL (AD) CONVERTER AND ANGULAR VELOCITY SENSOR USING SAME

摘要

An angular velocity sensor with a stable output characteristic using a sigma-delta type analog-to-digital converter comprising an integrator unit (62) for integrating electric charges output from an input switching device (44) and a digital-to-analog converter unit (48) and holding at least two integrated values, a comparator unit (63) for comparing at least the two integrated values output from the integrator unit (62) with a predetermined value, and an arithmetic operation unit (73) for operating an output signal of the comparator unit (63), the arithmetic operation unit (73) provided with a differential operation unit (70) for computing a difference between at least two comparison signals output from comparator unit (63).