According to one embodiment, a heat sink includes an extended end screwed to a printed circuit board. The feature extractor may be configured to extract dynamic feature vectors from source speech. This allows development of AC-to-DC converters, including power-factor-correction converters, and DC to DC converters with high conversion ratio with minimal parts count & high reliability. The present multi-bit addressing technique allows, for example, 10 to 100 bits of data to be accessed or addressed at a single node.