Patent ID: 7558014

Claim:
A system comprising: a magneto-resistive read element having first and second ends; and a differential high pass amplifier comprising: a first differential amplifier including first and second inputs and first and second outputs; a second differential amplifier including first and second inputs that communicate with said first and second outputs of said first differential amplifier, respectively, and first and second outputs; first and second resistances including first ends that communicate with said first and second inputs of said first differential amplifier, respectively, and second ends that communicate with said first and second outputs of said first differential amplifier, respectively; first and second capacitances including first ends that communicate with said first and second inputs of said first differential amplifier, respectively; and third and fourth resistances including first ends that communicate with said second ends of said first and second capacitances and with said first and second ends of said magneto-resistive read element, respectively, and second ends that communicate with said first and second outputs of said second differential amplifier, respectively.