Browse Prior Art Database

Serial Communication Method for Improving Soft Error Rate

IP.com Disclosure Number: IPCOM000118923D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Matsubara, N: AUTHOR [+4]

Abstract

Disclosed is a communication method between an Hard Disk Controller (HDC) and a preamplifier Integrated Circuit (IC) for a signal from a head of an Hard Disk Drive (HDD) to improve a Soft

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This is the abbreviated version, containing approximately 55% of the total text.

Serial Communication Method for Improving Soft Error Rate

      Disclosed is a communication method between an Hard Disk
Controller (HDC) and a preamplifier Integrated Circuit (IC) for a
signal from a head of an Hard Disk Drive (HDD) to improve a Soft

Error Rate (SER) when a head of the HDD is reading a data on a disk.
The HDC and preamplifier IC are connected with three signal lines
and perform a serial communication through these three lines.  At the
same time, a digital noise from the HDC is transmitted to
preamplifier IC through them.  This noise affects preamplifier IC and
a SER is degraded because the preamplifier IC deals with a very small
amplitude of signal.  This disclosure is to improve a SER by not
transmitting the  noise from the HDC to preamplifier IC when HDD is
reading data on a disk.  By improving a SER, product yield and data
density on the disk can be increased.

      The characteristics of this disclosure are that these three
signal lines are in a high-impedance state when HDC and preamplifier
IC are not doing a serial communication, taking advantage of the
feature that a head of an HDD reads the data on a disk only when they
are not doing a serial communication.  A digital noise from the HDC
is never transmitted to a preamplifier IC when these lines are in a
high-impedance state.  Therefore, a SER is improved because the
preamplifier IC can amplify a signal from a head without any
influence by the noise.

      Fig. 1 shows the conne...