A charge control circuit includes a resistance module, a voltage comparing module, and a charge control module. In accordance with the present invention, computer implemented methods and systems are provided for separation and mapping of representational and linguistic semantics. A baseNP identifier identifies baseNPs in the linguistic input using a unified statistical model that identifies the baseNPs, given the N-best POS sequences. Printing on one side of the thin, flexible membrane provides alphanumeric indicia and graphical designs for the electronic device.