A high speed low noise CMOS MR preamplifier for disk drives

Jeremy Kuehlwein, Ramesh Harjani

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


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 languageEnglish (US)
Article number1471097
Pages (from-to)66-69
Number of pages4
JournalEuropean Solid-State Circuits Conference
StatePublished - 1999
Event25th European Solid-State Circuits Conference, ESSCIRC 1999 - Duisburg, Germany
Duration: Sep 21 1999Sep 23 1999


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