HIGH-FREQUENCY PHENOMENA IN MAGNETIC RECORDING AND INDUCTIVE DEVICES

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" HIGH-FREQUENCY PHENOMENA IN MAGNETIC RECORDING AND INDUCTIVE DEVICES "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	150428
Doc. No	:	ET22220
Main Entry	:	Jason Charles Jury
Title Proper	:	HIGH-FREQUENCY PHENOMENA IN MAGNETIC RECORDING AND INDUCTIVE DEVICES
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	At high frequencies (1 GHz), ferromagnetic materials and associated electronic cir-cuitry show interesting and sometimes undesirable behavior. In this dissertation, weexamine high-frequency effects in magnetic recording and magnetic inductive devices.We analyze "impedance profiling" of the disk drive interconnect, as a way of shapingthe write current waveform. This proves to be useful under somewhat limited condi-tions (for write head with low impedance, characteristic time of the shaped waveformless than the one-way interconnect propagation delay). We then analyze a bufferamplifier (consisting of a single transistor in an emitter-follower configuration) as ameans of improving the electronic signal-to-noise ratio (SNR) associated with high-resistance read sensors. We develop and utilize a "matched filter bound" SNR forassessing the performance of the disk drive read-path. For a hypothetical recordingsystem at an areal density of 1 Tbit/in2, the buffer amplifier improves SNR anywherefrom 0.5 dB for 670 Mb/s up to 1 dB-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL45424.pdf
Title and statement of responsibility and	:	HIGH-FREQUENCY PHENOMENA IN MAGNETIC RECORDING AND INDUCTIVE DEVICES [Thesis]