A patella drill guide includes a base portion rotatably mounted on a bone-gripping component. An insulation film comprising a silicon oxide film is formed by means of oxidation treatment on the side surface of an emitter aperture, and then an epitaxial layer comprised of SiGe is grown selectively in an aperture formed by removing a silicon nitride film so as to form under cut. The BOC modulation signal is modulated with a pseudorandom noise sequence comprising a plurality of chips, wherein each of said chips has a set interval. Thus, variations in a system voltage caused by an error or the conversion power control can be reduced. In addition, the controller may smoothly reduce the power delivered to the load by the output circuit prior to disabling it, for example to control output glitches. Available resources in a next discrete set of resource from the hierarchy of discrete sets of resources are added to a virtual organization of resources handling the job within the grid environment.