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In this paper, a micropower interface IC for a capacitive 3-axis micro-accelerometer implemented in a 0.25-mum CMOS process is presented. The fully-integrated sensor interface consists of a DeltaSigma sensor front-end that converts the acceleration signal into the digital domain, a decimator, a frequency reference, a clock generator for the front-end, a voltage and current reference, the required...
In a 3-axis compass, the system tilt of the sensors needs to be compensated to calculate the heading of the compass correctly. A novel tilt compensation algorithm using the CORDIC algorithm is presented. Only five 2D-CORDIC operations are needed to ac quire the heading angle from three components of magnetic and acceleration data. This can be useful in ASIC and FPGA designs where the compass data...
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