Embodiments of the present invention relate to systems and methods of
position sensing that use a sensing target with a pattern of features
thereupon, and to positioning modules and systems that position
functional elements using such position sensing systems. A position
sensing system includes an encoding module and a processing module. The
encoding module has an active encoding region through which the sensing
target is configured to move. Further, the encoding module is configured
to generate a signal based on a portion of the sensing target within the
active encoding region. The active encoding region has a dimension
greater than the average critical dimension of the pattern of features.
The processing module is configured to convert the signal generated into
a position data based on an input range condition and an initial position
condition.