Related topic
 |
Implementation Issues Although communication theory provides a wealth of techniques that can be
applied to the data storage channel, their use is often limited by speed or
power concerns. Unlike conventional channels such as telephone lines which
operate at tens of kilohertz rate modern hard drives require bit rates of
hundreds of megahertz. At the same time use in portable computers demands
power efficiency. These constraints require the channel engineer to
investigate methods for simplifying the signal processing or reformulating
it in a manner that although mathematically equivalent is more efficient
when mapped to a VLSI design. Channel components in today's disk drives typically combine analog and digital circuits. The use of analog processing at the front end of the readback channel is common practice because it generally requires less power than the digital counterpart. In this area, members of the CDSLab benefit from interaction with the Analog Design Group. This interaction has, in part, led to papers from both groups, including
|
|
Copyright @ University of Minnesota CDSLab |