公开(公告)号：US20230267963A1

公开(公告)日：2023-08-24

申请号：US18166291

申请日：2023-02-08

Applicant: STMICROELECTRONICS KK ,  STMICROELECTRONICS S.r.l.

Inventor： Marco Ferrari ,  Davide Betta ,  Diego Tognoli ,  Roberto Trabattoni

IPC: G11B21/08

CPC classification number: G11B21/083

Abstract: In accordance with an embodiment, a hard disk drive includes voice coil motors (VCMs) coupled to respective control units configured to drive retract an operation of the VCMs in the hard disk drive. The retract operation of the VCMs includes a sequence of retract steps. The control units are allotted respective time slots for communication over a communication line with the respective time slots synchronized via the common clock line, and are configured to drive sequences of retract steps of the VCMs in the hard disk drive in a timed relationship.

公开(公告)号：US11942113B2

公开(公告)日：2024-03-26

申请号：US18166291

申请日：2023-02-08

Applicant: STMICROELECTRONICS KK ,  STMICROELECTRONICS S.r.l.

Inventor： Marco Ferrari ,  Davide Betta ,  Diego Tognoli ,  Roberto Trabattoni

IPC: G11B5/54 ,  G11B5/48 ,  G11B21/08

CPC classification number: G11B21/083

Abstract: In accordance with an embodiment, a hard disk drive includes voice coil motors (VCMs) coupled to respective control units configured to drive retract an operation of the VCMs in the hard disk drive. The retract operation of the VCMs includes a sequence of retract steps. The control units are allotted respective time slots for communication over a communication line with the respective time slots synchronized via the common clock line, and are configured to drive sequences of retract steps of the VCMs in the hard disk drive in a timed relationship.

公开(公告)号：US09025689B2

公开(公告)日：2015-05-05

申请号：US13873081

申请日：2013-04-29

Applicant: STMicroelectronics S.r.l.

Inventor： Massimiliano Siti ,  Alessandro Tomasoni ,  Marco Ferrari ,  Sandro Bellini ,  Oscar Volpatti

IPC: H04L1/00 ,  H04B7/04 ,  H04L25/03 ,  H04L1/06

CPC classification number: H04L1/0055 ,  H04B7/0413 ,  H04L1/005 ,  H04L1/0064 ,  H04L1/0656 ,  H04L25/03171 ,  H04L25/03292 ,  H04L25/03331 ,  H04L25/03891 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: An embodiment of an arrangement detects sequences of digitally modulated symbols from multiple sources. The arrangement identifies a suitable set of candidate values for at least one transmitted sequence of symbols and determines for each candidate value a set of sequences of transmitted symbols. The arrangement estimates at least one further set of sequences of transmitted symbols, calculates a metric for each sequence of transmitted symbols, and selects the sequence that maximizes the metric. At the end, a-posteriori bit soft output information for the selected sequence is calculated from the metrics for said sequences. Generally, these calculations are based on the information coming from a channel-state-information matrix and a-priori information on the modulated symbols from a second module, such as a forward error-correction-code (ECC) decoder.

Abstract translation: 布置的实施例检测来自多个源的数字调制符号的序列。 该装置为至少一个发送的符号序列识别适当的一组候选值，并且为每个候选值确定一组发送符号的序列。 该装置估计至少一组另外的发送符号序列集合，计算发送符号的每个序列的度量，并选择使度量最大化的序列。 最后，从所述序列的度量计算所选序列的后验位软输出信息。 通常，这些计算基于来自信道状态信息矩阵的信息和来自第二模块（诸如前向纠错码（ECC））解码器的调制符号的先验信息。