摘要:
A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.
摘要:
A disk drive having a translatable ramp is disclosed. The disk drive includes a head gimbal assembly having a proximate end that is attached to an actuator, and a distal end that includes a lift tab. The ramp includes a lift tab supporting surface located as close to a pivot axis of the actuator as is the lift tab. The ramp also includes a ramp guiding surface that is in contact with a mating surface of the disk drive base. A fastener selectively allows or prevents relative translation between the ramp and the disk drive base. The aforementioned contact constrains the relative translation so that the relative translation changes the distance between the lift tab supporting surface and the disk axis of rotation more than the relative translation changes the distance between the lift tab supporting surface and the actuator pivot axis.
摘要:
There is provided a head gimbal assembly (HGA) for a disk drive. The HGA includes a slider and a flexure. The slider includes first, second and third electrically conductive pads disposed upon a trailing side. The first electrically conductive pad is disposed between the second and third electrically conductive pads. The flexure includes first, second, and third patterned conductive traces respectively electrically connected to the first, second, and third electrically conductive pads. The first patterned conductive trace is disposed between the second and third patterned conductive traces in a flexure body portion.
摘要:
A disk drive includes a disk drive base, a disk rotatably coupled to the disk drive base having a disk surface, a head stack assembly rotatably coupled to the disk drive base adjacent the disk surface, and a cover attached to the disk drive base enclosing the disk and head stack assembly there between. The cover includes a metal layer and a polymer layer substantially coextensive with the metal layer and extending substantially across the disk drive base. The polymer layer includes a polymer layer feature extending away from the metal layer towards the disk drive base. The polymer layer feature defines a cavity between the polymer layer and the metal layer.
摘要:
An interference canceller comprises a composite interference vector (CIV) generator configured to produce a CIV by combining soft and/or hard estimates of interference, an interference-cancelling operator configured for generating a soft-projection operator, and a soft-projection canceller configured for performing a soft projection of the received baseband signal to output an interference-cancelled signal. Weights used in the soft-projection operator are selected to maximize a post-processing SINR.
摘要:
The present invention is directed to the selective provision of interference canceled signal streams to demodulating fingers in a communication receiver. According to the present invention, potential interferer signal paths are identified. Signal streams having one or more potential interferer signals removed or canceled are created, and a correlation is performed to determine whether the strength of a desired signal path increased as a result. If the correlation indicates that the strength of a desired signal path was increased by the signal cancellation, the interference canceled signal stream is provided to the demodulation finger assigned to track the desired signal path. If the correlation determines that the strength of the desired signal path did not increase as a result of performing interference cancellation, the raw or a different interference canceled signal stream is provided to the demodulation finger.
摘要:
A disk drive includes an opaque cover secured to a base, where the opaque cover has an opening. A see-through insert, which includes an electrically conductive material, is affixed to the opaque cover over the opening. The electrically conductive material may be a coating applied to the see-through insert which, in one embodiment is a polymer coating having a certain surface resistivity. Alternatively, the coating's ESD-dissipative properties may be due to the presence of sputtered gold, sputtered indium tin oxide or a metal film. The electrically conductive material may alternatively be embedded in the see-through insert.
摘要:
An actuator for a disk drive is disclosed. The actuator includes a plurality of arms including an upper outer arm, a lower outer arm, and at least one inner arm. The outer arms each include a region of reduced width and also include a region of increased thickness, both such regions being located closer to a proximal supported end of the outer arm than to its distal end. Each region of increased thickness has a minimum thickness that is more than the thickness of the inner arm at an equal distance from the axis. Each region of reduced width has a minimum width that is less than the minimum width of the inner arm at an equal distance from the axis.
摘要:
A flexure is provided for a HGA suspension. The flexure includes a metal base layer, a trace layer, and a dielectric layer disposed between the trace and base layers. The metal base layer includes a heat sink portion. The trace layer includes a plurality of conductive traces, each conductive trace having a curved section that terminates in a trace termination pad. The dielectric layer includes a portion that underlies the trace termination pads and overlies the heat sink portion. The base layer and the dielectric layer each also include a window. The curved section of each conductive trace extends over the window of the base layer. The curved section of each conductive trace may at least partially extend over the window of the dielectric layer.
摘要:
A tooling mandrel for use in assembling a disk drive having a disk drive base and a head stack assembly with a pivot bearing cartridge. The cartridge includes a shaft and a sleeve. The shaft includes a shaft first end with an engagement feature. The shaft defines an axis of rotation and a shaft outer circumferential surface. The sleeve defines a sleeve inner circumferential surface disposed towards the shaft outer circumferential surface. The tooling mandrel includes a retainer element defining a longitudinal axis and including a distal end. The distal end engages the engagement feature. The tooling mandrel includes tooling fingers angularly fixed to the retainer element with respect to the longitudinal axis. The tooling fingers each include a tip portion. Each tip portion engages the pivot bearing cartridge through cooperative radial movement with respect to the axis of rotation with the distal end engaged with the engagement feature.