Patent ID: 6744264
Filing Date: 2004-06-01
Classification: G01D,G01R

Abstract:
A packaged device comprising:a micro-electromechanical systems (MEMS) sensor comprising a moving element connected to a first output, a first plate connected to a second output and a second plate connected to a third output, wherein the moving element and the first plate form a first capacitor producing a first capacitance and the moving element and the second plate form a second capacitor producing a second capacitance; an amplifier with a first input connected to the first output, a second input connected to a first voltage of a plurality of voltages and a fourth output accessible outside the integrated circuit; a testing means for causing an output voltage appearing at the fourth output to reflect one of the first and the second capacitances, wherein the testing means comprises a first switch preventing any voltage from being applied to the second output in an open state.