Cmos Circuits for Thermal Asperity Detection and Recovery in Disk-drive Read Channels *

نویسندگان

  • Aaron Lee
  • Paul Hurst
  • Kiyoshi Fukahori
چکیده

A thermal asperity detection and recovery scheme for a disk-drive read channel is presented. The circuit design and simulation results for two key blocks, the AC coupler and its tuning loop, in a 0.5μm CMOS process are described.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Low-Power CMOS VGA for 50Mb/s Disk Drive Read Channels

We describe an all CMOS variable gain ampliier (VGA) suitable for use in disk drive read channels. The VGA maintains a 3dB bandwidth greater than 85 MHz throughout its gain range. This ensures good phase linearity for data transfer rates of up to 50Mb/s. The VGA provides a 25dB gain variation along an ideal exponential gain to control voltage curve and 30dB of gain control if ideal exponential ...

متن کامل

A 50 MHz 70 mW & Tap Adaptive EqualizerlViterbi Sequence Detector in 1 . 2 pm CMOS

A new architecture for digital implementation of the adaptive equalizer in Class IV Partial Response Maximum Likelihood (PRML) channels employing parallelism and pipelining is described. The architecture was used in a prototype integrated circuit in a 1.2 pm CMOS technology to implement a 50 MHz adaptive equalizer and Viterbi sequence detector dissipating 70 mW from a 3.3 V supply. 1 .O Introdu...

متن کامل

An all-analog CMOS implementation of a turbo decoder for hard-disk drive read channels

In this work we present a full analog turbo decoder for hard-disk EPR-IV read channels in CMOS technology. The design is based on a current-mode approach developed by Loeliger et al. [1], for the analog implementation of sum-product algorithms. The circuits main attractions are the coding gain offered by turbo codes over the uncoded EPR-IV channel, and the relative simplicity and power efficien...

متن کامل

Effect of contact conditions during thermo-mechanical contact between a thermal flying height control slider and a disk asperity

A three-dimensional thermo-mechanical model is developed for the transient contact between a thermal flying height control (TFC) slider and a disk asperity. The effect of contact conditions is investigated, including the friction coefficient and the circumferential disk velocity. The damage of the read–write shields due to contacts with disk asperities is studied along with the maximum temperat...

متن کامل

A New Thermal Asperity Detection and Correction Algorithm for Perpendicular Recording Channels

The thermal asperity (TA) defect resulting from the collision between an asperity and the magneto-resistive (MR) read head can distort the readback signal to the extent of causing possible sector read failure. This paper presents a new TA detection and correction algorithm for perpendicular recording channels. The proposed algorithm consists of two channels running in parallel, one for the H1(D...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2002