Abstract: A storage device comprises, a head assembly, motor(s) configured to actuate the head assembly. The storage device may optionally include tape reel(s) holding tape media for storing data and a casing. The head assembly and its suspension system comprises a support structure, a head housing having an upper attachment bracket and a lower attachment bracket, a first flat spring attached to the upper attachment bracket, a second flat spring attached to the lower attachment bracket, and a head bar attached on an upper side to the first flat spring and attached on a lower side to the second flat spring. The head bar includes at least one read head and at least one write head.

Abstract: A storage device comprises, a head assembly, motor(s) configured to actuate the head assembly. The storage device may optionally include tape reel(s) holding tape media for storing data and a casing. The head assembly and its suspension system comprises a support structure, a head housing having an upper attachment bracket and a lower attachment bracket, a first flat spring attached to the upper attachment bracket, a second flat spring attached to the lower attachment bracket, and a head bar attached on an upper side to the first flat spring and attached on a lower side to the second flat spring. The head bar includes at least one read head and at least one write head.

Abstract: Embodiments in accordance with the present invention provide a drive unit that is capable of satisfactorily performing the positioning control with disturbance components included in a position error signal being effectively controlled. According to one embodiment, an error signal generator of a drive unit generates a position error signal (PES) on the basis of servo data read out from a magnetic disk. On the assumption that a frequency of a periodic variation component included in the PES is a target frequency, if a target frequency deviates from an effective frequency range of a digital filter, a downsampler down-samples the PES, and then supplies the PES to the digital filter so that the effective frequency range is shifted. As a result, within the shifted effective frequency range, a setting changing unit can control a setting frequency of the digital filter so that the setting frequency follows the target frequency.

Abstract: Embodiments in accordance with the present invention provide a drive unit that is capable of satisfactorily performing the positioning control with disturbance components included in a position error signal being effectively controlled. According to one embodiment, an error signal generator of a drive unit generates a position error signal (PES) on the basis of servo data read out from a magnetic disk. On the assumption that a frequency of a periodic variation component included in the PES is a target frequency, if a target frequency deviates from an effective frequency range of a digital filter, a downsampler down-samples the PES, and then supplies the PES to the digital filter so that the effective frequency range is shifted. As a result, within the shifted effective frequency range, a setting changing unit can control a setting frequency of the digital filter so that the setting frequency follows the target frequency.

Abstract: An inverter apparatus constituted by one or more series connections of plural semiconductor devices each having a pair consisting of an insulated gate bipolar transistor, and a diode, both of which are in a reverse parallel connection with each other, wherein the resistivity of the base layer of the lowest impurity concentration in the diode is lower than that of the base layer of the lowest impurity concentration in the insulated gate bipolar transistor, and wherein a breakdown voltage of said insulated gate bipolar transistor at the time of switching from a conduction state to a blocking state is lower than a breakdown voltage of said insulated gate bipolar transistor and said diode at the time of the blocking state.

Abstract: The present invention provides a semiconductor device comprising, at least a pair of an insulated gate bipolar transistor, and a diode, both of which are in a reverse parallel connection with each other, wherein the resistivity of the base layer of the lowest impurity concentration in the diode is lower than that of the base layer of the lowest impurity concentration in the insulated gate bipolar transistor, and wherein a breakdown voltage of said insulated gate bipolar transistor at the time of switching from conduction state to blocking state is lower than a breakdown voltage of said insulated gate bipolar transistor and said diode at the time of blocking state.