A 30 MHz low-noise CMOS preamplifier for disk drive heads

1989 Proceedings of the IEEE Custom Integrated Circuits Conference Pub Date : 1989-05-15 DOI:10.1109/CICC.1989.56704

T. Pan, A. Abidi

引用次数: 2

Abstract

Data stored as magnetic flux reversals on a hard disk are read by an inductive head in close proximity to the disk, across which voltage signals of 0.1-1 mV are induced by the flux. These analog signals must be amplified before they are converted to logic levels by a decision circuit. A read-head preamplifier specially designed to be driven by an inductive source is used for this purpose. In a modern disk-drive subsystem, this amplifier must be wideband (>30 MHz), have a voltage gain of at least 100, and have low input noise (<2 nV/√Hz). The authors report on the first such amplifier fabricated in a 3-μm CMOS process. Some of the unique advantages offered by a CMOS design are highlighted, and its performance in a disk subsystem is compared with that of the industry standard bipolar preamplifier

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

用于磁盘驱动器磁头的30 MHz低噪声CMOS前置放大器

作为磁通量反转存储在硬盘上的数据由靠近磁盘的感应磁头读取，磁通量感应0.1-1 mV的电压信号穿过磁头。这些模拟信号在被判决电路转换为逻辑电平之前必须被放大。专门设计的由电感源驱动的读头前置放大器用于此目的。在现代磁盘驱动器子系统中，该放大器必须是宽带(>30 MHz)，具有至少100的电压增益，并且具有低输入噪声(<2 nV/√Hz)。作者报告了第一个用3 μm CMOS工艺制造的放大器。强调了CMOS设计提供的一些独特优势，并将其在磁盘子系统中的性能与工业标准双极前置放大器的性能进行了比较

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

1989 Proceedings of the IEEE Custom Integrated Circuits Conference

自引率

0.00%

发文量

期刊最新文献

A 1.4 ns/64 kb RAM with 85 ps/3680 logic gate array A gate matrix deformation and three-dimensional maze routing for dense MOS module generation A submicron CMOS triple level metal technology for ASIC applications Hot carrier effects on CMOS circuit performance The QML-an approach for qualifying ASICs