Patent ID: 8872761
Filing Date: 2014-10-28
Classification: G06F

Abstract:
1. Signal processing method for processing an output signal from a pointing device having a base and an actuator movable with respect to the base, and a detector configured and arranged for providing at least first and second positional signals indicating a position of the actuator with respect to the base along corresponding first and second axes, and for providing a common mode signal indicating a position of the actuator with respect to a third axis of the actuator, the third axis substantially normal to the first and second axes, based upon a sum of magnitudes of the first and second positional signals, the method comprising: converting the at least two positional signals into a polar coordinate signal including a magnitude signal, thresholding the magnitude signal of the polar coordinate signal to provide a thresholded magnitude signal; applying a conversion curve to the thresholded magnitude signal to produce a velocity magnitude signal from the output signal of the pointing device, and determining a derivative of the common mode signal.