Samsung Electronics Co., Ltd.

Apple Inc.

Hao Ping Wen

Prashant H Vashi

Achmed Rumi Zahir

Peng Luo

Keung Youn Cho

Shuyu Sun

Reza Arastoo

Bipinchandra V Gami

Punit H Awatramani

Mingkun Li

Douglas A Mackay

Murali Mohan Chakka

Kwong-Tat Chan

Yih Hurng Jung

Luca Aldegheri

Priyank Mamania

Vasanthakumar Balasubramaniam

De Jun Li

Amir Rajaee

Tu Le

Communication device may include a transmitter and a receiver respectively coupled to one or more antennas to communicate (e.g., transmit or receive signals) with a base station. The communication device may receive an operating characteristic of a cellular modem within the communication device operating in a first cellular configuration and determine if the operating characteristic are greater than a threshold. The operating characteristic may include power and/or temperature. The threshold may include a power budget and/or a temperature threshold. If the operating characteristic is greater than the threshold, then the communication device may determine a control effort value based on the operating characteristic and the threshold. The communication device may map the control effort value to a second cellular configuration, which may correspond to reduced operating characteristics in comparison to the first cellular configuration. The communication device may then cause the cellular modem to operate in the second cellular configuration.

PI controller for cellular baseband mitigation

A hard disk drive with a disk that has a servo field with an A servo burst and a B servo burst. The A servo burst has a trimmed erase band. The trimmed erase band can be created by offsetting the write head relative to a burst centerline to reduce the width of the erase band. For example, the write head can be moved toward a centerline of the A servo burst. The offset can be a function of write current and cylinder location of the disk. The offsets are selected so that the resultant burst profiles do not contain a flat minimum portion.

Erase band compensated offset servo trimming

A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.

Utilization of the acceleration zone in ammonite servo writing

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Sunnyvale, CA, United States of America

Hao Ping Wen