Abstract: A circuit for supplying a DC output of a desired voltage from an input regardless of power received. In this circuit, a rectifier converts an alternating current (AC) input to direct current (DC) or changes a DC input to a desired polarity. A boost converter receives DC current having a first voltage from the rectifier and outputs DC current having at least a minimal voltage. Finally, a buck boost converter receives the DC current having at least the minimal voltage and outputs DC having a desired voltage.

Abstract: A disk drive system comprises control circuitry and a disk device. The disk device transfers an analog signal representing servo data and user data from a disk device to the control circuitry. The servo data includes servo synch marks. The control circuitry processes the analog signal to generate a digital signal representing the user data. The control circuitry includes Viterbi circuitry and servo circuitry. The Viterbi circuitry interleaves and sums samples of the analog signal. The Viterbi circuitry then processes the sums using two states, an even magnet length constraint, a D=1 constraint, and a sliding threshold algorithm to generate a bit sequence. The servo circuitry processes the bit sequence to detect the servo synch marks.

Abstract: The instrument package mounting apparatus comprises an axle that serves to eliminate the need to wrap a tether line about the axle. In particular, the axle comprises a cylindrical solid configured with a slot extending from the outer surface of the axle to a substantially central axis thereof, the slot being capable of receiving the tether line. Juxtaposed to this slot and located substantially centered about the substantially central axis of the axle is a rectangular shaped interior channel that functions to receive a pinch bar comprising a substantially rectangular shaped tapered bar. The tapered pinch bar is inserted into the channel formed in the axle and operates to frictionally secure the tether line and the axle. The friction to secure the tether line in the slot, as held in place by the tapered pinch bar is generated by a compression fit formed as the tapered pinch bar is inserted into the interior channel of the axle.