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Predriver For "H" Configured Write Driver For Magnetic Recording

IP.com Disclosure Number: IPCOM000052076D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Bailey, JA Black, RG Lewkowicz, J [+details]

Abstract

Illustrated above is a circuit diagram of an "H" write driver and predriver for a magnetic recording system. Transistors Q1, Q2, Q3 and Q4 form an "H" write driver which provides bidirectional write current through a thin film magnetic write head. Since thin film head impedance is dominated by resistive impedance, the write head is represented in the diagram by resistor RH, and head inductance is not shown.