An angle sensor includes a sensor rotor formed with a planar coil and a sensor stator including a multi-X type planar coil placed to face a surface of the sensor rotor. Each register of the first set is mapped in a corresponding register of the second set designed to emulate the behavior of the first register, obtaining a unique independent translation of the first set into the second set. These files can be used to create new and different skin appearances, layouts and functionalities. The one or more low threshold MOS inverters operate in a manner that the one or more capacitors get charged to a voltage greater than the low input voltage. The optically imaged playing cards can be processed within a computing system to allow the authentication of the playing cards.