Degauss waveform generator for perpendicular recording write...

Demagnetization of magnetic media for data storage device...

Demagnetizing apparatus for erasing signals recorded on concentr

Device for erasing visible recorded signals from a recording med

Device for reading magnetic information

Differential magneto-resistive head pre-amplifiers for...

Differential voltage bias, voltage sense preamplifier...

Digital filtering and digital automatic gain control for a...

Digital magnetic reproducing apparatus and digital magnetic reco

Digital magnetic reproducing apparatus and digital magnetic reco

Digital tape erasure conditioning system

Digitally controlled automatic bias circuit for magnetic recordi

Direct coupled wide-bandwidth front-end with smart bias...

Disc drive head bias current optimization

Disk device and data-erasing method

Disk drive employing a sync mark detector comprising a...

Disk drive for detecting a polarity error of a...

Disk drive having a head amplifier for perpendicular...

Disk drive that discerns the polarity of a head signal from...

Disk drive with fault detector for erase heads