Various embodiments of decoding systems and methods are disclosed. A non-magnetic toner comprising: a toner base particle which comprises a binding resin, and a colorant; and external additives,wherein a surface of the toner base particle contains at least a resin having at least silanol group, and the external additives contain at least particles composed of silicon oxide. This method allows the first pouch to be reliably separated from the second pouch by overcoming the various forces that typically cause adjacent pouches to cling to each other while stacked together. The base level, or the base-emitter bias, is oppositely modulated by the input signal through the common emitter, which causes the modification of the base current.