News Column

Patent Issued for Preamplifier-To-Channel Communication in a Storage Device

May 14, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- LSI Corporation (San Jose, CA) has been issued patent number 8711502, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Wilson, Ross S. (Menlo Park, CA); Goldberg, Jason S. (Saint Paul, MN).

This patent was filed on October 12, 2012 and was published online on April 29, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "Conventional preamplifiers used in storage devices implement an interface controller to communicate with a channel, preamplifier, and other elements through a synchronous three-wire port. Clock and data lines of the three-wire port (or several three-wire ports) are routed in parallel to various blocks within the storage device. Each block contains control and status registers. The status registers are hardwired to predetermined configurations, which vary according to customer preferences and specifications. When a customer requests a change, such reconfiguration requires a new chip mask.

"It would be desirable to implement preamplifier-to-channel communication that allows migration of analog processing functions to a preamplifier, conserves circuit pads and/or may be easy to reconfigure without the need for a new mask."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "The present invention concerns an apparatus comprising a preamplifier, a channel, and a controller. The preamplifier may be configured to read/write data to a drive with a read/write head, in response to (i) a plurality of digital control signals multiplexed to be sent/received over a first bus and (ii) one or more analog data signals sent/received over a second bus. The channel may be configured to (i) connect to the first and second bus, and (ii) send/receive the plurality of digital control signals through (a) a plurality of interconnects and (b) the first bus. The controller may be configured to send/receive the digital control signals over the interconnects. The apparatus may be configured to (i) read/write the analog data signals to the drive and (ii) generate the digital control signals, in response to one or more input/output requests received from a drive interface.

"The objects, features and advantages of the present invention include providing a preamplifier that may (i) be used in a disc drive, (ii) provide multiplexed preamplifier-to-channel communication over a digital bus, (iii) provide a compact implementation, (iv) be used in a storage device, (v) reduce the number of bond pads needed for connections to external components, (vi) provide programmable preamplifier register-field mapping to implement a post production configurable design, (vii) conserve printed circuit board (PCB) area, (viii) provide additional externally controlled functions in a preamplifier without adding more control lines, (ix) provide signal processing in a preamplifier in a design that needs tight linkage between a channel and preamplifier and/or (x) optimize analog and/or digital components."

For the URL and additional information on this patent, see: Wilson, Ross S.; Goldberg, Jason S.. Preamplifier-To-Channel Communication in a Storage Device. U.S. Patent Number 8711502, filed October 12, 2012, and published online on April 29, 2014. Patent URL:

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

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Source: Electronics Newsweekly

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