CAPACITANCE SENSOR STRUCTURE

摘要

A capacitance sensor structure includes a first sensor in a first direction and a second sensor in a second direction for sensing a variation in the mutual capacitance between the first sensor and the second sensor by applying an excitation signal to the first sensor and detecting a response signal from the second sensor. The sensing area of the second sensor is intentionally reduced to be much smaller than the sensing area of the first sensor for noise performance improvement of the mutual capacitance sensing.