A switching amplifying method or a switching amplifier for obtaining one or more linearly amplified replicas of an input signal, is highly efficient, and does not have the disadvantage of \u201cdead time\u201d problem related to the class D amplifiers. The peak detector block can compare a received signal to predetermined thresholds. Further, the semiconductor device includes graded dielectric constant spacers formed on sidewalls of the dielectric layer, sidewalls of the gate electrode and portions of an upper surface of the semiconductor substrate. An adjustable heater control and temperature gauge are used to monitor and control the amount of heat applied to the prosthesis.