In this paper we present design for a high speed low noise preamplifier for use with magnetoresistive read elements in disk drive channels. The performance of the reader circuit is comparable with the more expensive current generation of BiCMOS MR preamplifiers. The measured results include a gain of 43dB, 3dB bandwidth of 273MHz, input-referred voltage noise is less than 0.57nV/√Hz, and input-referred current noise is less than 0.8pA/√Hz. The preamplifier has been implemented in a 0.8-μm CMOS process and occupies a die area of 1.78 × 1.78 mm2.
|Original language||English (US)|
|Number of pages||4|
|Journal||European Solid-State Circuits Conference|
|State||Published - Dec 1 1999|
|Event||25th European Solid-State Circuits Conference, ESSCIRC 1999 - Duisburg, Germany|
Duration: Sep 21 1999 → Sep 23 1999