News Column

Patent Issued for In-Channel Channel Optimization for Hard-Disc Drive Read/Write Chips

July 23, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- LSI Corporation (San Jose, CA) has been issued patent number 8773789, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Chang, Wu (Sunnyvale, CA); Rahgozar, Parviz (Cupertino, CA); Jin, Ming (Fremont, CA); Xia, Haitao (San Jose, CA).

This patent was filed on February 14, 2013 and was published online on July 8, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "The disclosure relates to read/write chips for hard disc drives (HDDs) and, more specifically but not exclusively, to the optimization of channels, such as read, write, and/or servo channels, for HDD read/write chips.

"This section introduces aspects that may help facilitate a better understanding of embodiments of the invention. Accordingly, the statements of this section are to be read in this light and are not to be understood as admissions about what is prior art or what is not prior art.

"In a hard disc drive (HDD), the write channel of a read/write chip generates a write signal that a write head uses to store data onto an associated hard disc, an associated read head subsequently generates a read signal corresponding to that stored data, and the read channel of the read/write chip converts that read signal into a recovered data signal that ideally accurately reflects the data stored on the hard disc. A conventional HDD read/write chip implements parameter-driven read-channel processing whose parameter values can be configured, e.g., by the chip manufacturer and/or by the chip manufacturer's customer who assembles the chip into an HDD. The channel processing of a conventional HDD read/write chip can be optimized using off-chip electronics (e.g., programmable processor-based test equipment) that analyze the recovered data signals (and possibly other chip I/O (input/output) data that is accessed off chip via customer-available I/O ports of the chip's user interface) for different sets of channel parameter values to determine an optimal set of channel parameter values for that chip. Such off-chip electronics are typically implemented as a programmable processor executing software and/or firmware designed to perform the optimization analysis for the channel processing."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "In one embodiment, the invention is an apparatus comprising a read/write chip for a hard disc drive having a read/write head. The chip comprises a servo channel configured to control operations of the read/write head, a write channel configured to generate a write data signal used by the read/write head to store data on a hard disc of the hard disc drive, a read channel configured to process a read data signal generated by the read/write head to generate recovered data representative of the data stored on the hard disc, and at least one optimization processor that is part of at least one channel of the servo, write, and read channels. The at least one optimization processor is configured to (i) analyze processing of the at least one channel for a plurality of different parameter values for one or more different channel parameters and (ii) select an optimal parameter value for each channel parameter.

"Additional embodiments of the invention are described in the application including the claims."

For the URL and additional information on this patent, see: Chang, Wu; Rahgozar, Parviz; Jin, Ming; Xia, Haitao. In-Channel Channel Optimization for Hard-Disc Drive Read/Write Chips. U.S. Patent Number 8773789, filed February 14, 2013, and published online on July 8, 2014. Patent URL:

Keywords for this news article include: Electronics, LSI Corporation.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

For more stories covering the world of technology, please see HispanicBusiness' Tech Channel

Source: Electronics Newsweekly

Story Tools Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters