Abstract: The invention provides a voltage generating apparatus for powering at least one amplifier. The voltage generating apparatus comprises a voltage source, a switched capacitor voltage converter and a voltage detector. The voltage source supplies a first voltage to a positive voltage input terminal of the at least one amplifier. The first voltage is a positive DC voltage. The switched capacitor voltage converter is coupled to the voltage source for outputting an output voltage to a negative voltage input terminal of the at least one amplifier according to the first voltage and a predetermined voltage. The output voltage is a negative DC voltage. The voltage detector is coupled to the switched capacitor voltage converter for determining a switching frequency corresponding to the predetermined voltage according to the output voltage.

Abstract: A system of providing a dynamic selection menu is provided. An input/output device receives a first fragment comprising a portion of a desired entry. A processor identifies and rearranges a first subset of entries, and identifying a first entry in the first subset. A display device displays the rearranged first subset of entries with the first entry highlighted.

Abstract: A handgrip is adapted to be sleeved on a tubular end of a handlebar of a bicycle, and includes a plastic elongated molded grip body. The grip body has an outer circumferential wall with a metacarpal portion and a proximate phalangeal portion respectively corresponding to anatomically contact areas of a human hand when the hand grips the grip body. The metacarpal portion has a cutout portion proximate to the proximate phalangeal portion. The cutout portion is elongated in the axial direction, and extends radially to communicate with an inner circumferential wall of the grip body. An annular shoulder portion is disposed inwardly from the cutout portion and radially toward the outer circumferential wall so as to define an annular insertion groove. A hollow flexible pad member includes a pad body which is inserted retainingly into the cutout portion. The pad body has an upper portion protruding outwardly of the outer circumferential wall to provide comfort to the metacarpal portion of the hand.