Low Power Capacitance-to-Voltage Converter for Magnetometer Interface IC

This paper presents the design and implementation of a fully integrated Capacitance-to-Voltage Converter analog front-end for magnetometer interface demands very low power solution operating in the frequency around 20 KHz. The design adapts low power architecture to create low noise electronic interface for Capaci Lorentz force magnetometer sensor. Using a 0.18 process, simulation results of this interface IC show that the proposed CVC can provide 33 dB closed loop gain, 20 noise at 20 KHz, while consuming 65 μA current from 1.8 Keywords—Analog front end, Capacitance Magnetometer, MEMS, Recycling Folded Cascode