A method, apparatus, and article of manufacture provide the ability to construct an optimal parameterization for a discrete surface patch. The amplitude patterns have different vertical thicknesses to change the amplitude of an exposing light, and the phase patterns have different vertical thicknesses to change the phase of the exposing light. Further, the sensitivity of the genetic circuit to phenol derivatives and the expression thereof can be controlled, and thus the genetic circuit can rapidly sense and quantify various enzymatic activities. To remove DC offset, the circuitry may obtain an averaged DC offset and subtract the averaged DC offset from the AC signal voltage to produce a sensor output signal. While the terminal box is provided to the generator motor, the connector is provided facing downward and the electric-power-supplying cable is connectable to the connector from underneath the connector. Carrier traps introduced into the electrode-protecting insulating film and the gate insulating film are thereby removed.