Abstract: Signal compensation method for magnetically sensitive position feedback device in which the compensation for voltage offset is performed in accordance with the following formula (1), while the compensation for voltage amplitude is performed in accordance with the following formula (2): Voffset=(PreMaxV)/4+(NextMaxV)/4+(MaxV)/2,??formula (1) wherein: Voffset is the voltage offset of the half-wave of the current position, PreMaxV is the maximum positive (negative) voltage of the preceding half-wave to the half-wave of the current position, NextMaxV is the maximum positive (negative) voltage of the next half-wave from the half-wave of the current position, and MaxV is the maximum negative (positive) voltage of the half-wave of the current position.

Abstract: The invention relates to an improved based structure with changeable colorful figures, wherein the based structure is printed with colorful figures. A coating layer is provided over the colorful figures to show a single color in usual time. The coating layer will become transparent after contacting water and the original colorful figures are then displayed. In use of the change, the based structure can be applied on many products being apt to water that obtains decorative effect of figures with changeable color and improves utilization.