Seagate Technology Incorporated

Western Digital (fremont), Inc.

Mark Edward Re

Edward Charles Gage

Chubing Peng

Mehmet Fatih Erden

Erozan Mehmet Kurtas

Edmund Bruno Fanslau, Jr

Venkata Sailaja Chilaka

Timing recovery and synchronization for data communication is utilized. A pilot sequence of signals can be selected to improve recovery of a phase offset and a frequency offset in a communication system. Sampling instances can further be adjusted based on pilot sequences within a user data portion.

Synchronization for data communication

An apparatus includes a bit patterned magnetic storage media, a write transducer positioned adjacent to the bit patterned magnetic storage media, a write driver coupled to the write transducer to deliver write pulses to the write transducer, an optical sensor for producing a bit pattern signal, and a timing recovery circuit for producing a synchronization signal in response to the bit pattern signal, wherein the timing of the write pulses is adjusted in response to the synchronization signal.

Alternative sensors for tracking and timing in bit patterned media

A head gimbal assembly having a suspension and a read/write head is provided. The read write head is attached to a flexure tongue of the suspension. Heating elements on arms of the suspension, set on either side of the suspension tongue, are used to alter flight characteristics of the read/write read such as pitch and roll. Due to differences in the coefficients of thermal expansion of the materials that comprise the arms, the arms bend when heated. Varying the heat output of the heating elements changes the temperatures of the arms, which changes the degree to which the arms are bent. The heating elements can be portions of traces in a trace layer. Control circuitry is provided to control the heating of the heating elements to maintain desired values of the flight characteristics.

Heated gimbal for magnetic head to disk clearance adjustment

Growing community of inventors

Pittsburgh, PA, United States of America

Mark Edward Re