Calvin Shizuo Nomura

Electrostatic discharge (ESD) protection of giant magneto-resistive (GMR) recording heads with a silicon germanium technology

Experimental studies on the ESD protection were completed on advanced magnetic recording giant magneto-resistive heads using a BiCMOS silicon germanium technology for the first time. SiGe-based active and passive elements, such as isolated MOSFETs, varactors and Schottky diodes were used to evaluate the influence of turn-on voltage on the protection levels.

A resonant switching write driver for magnetic recording

This paper describes a high-speed circuit for driving magnetic recording write heads. Resonant current switching enables a reduction in power consumption without compromising switching speed. With a 100 nH load and 120 mA/sub pp/ write currents, a rise time of 1.6 ns was achieved with a 7 V power supply.