Compensation of MR head non-linearities using a saturable transfer function

It is well known that the nonlinear behavior of Magneto-Resistive (MR) head s result in the isolated pulses having asymmetry and saturation. These nonl inear effects can be quantified by measuring the positive and negative isol ated pulses. In this paper, we propose a saturable model for estimating the MR nonlinearity from read-back signals. It models the nonlinearity using b ias and saturation parameters. The proposed model can be used to compensate the nonlinearity in the read-back signal, thus providing a way to lineariz e the channel, Simulations done using measured data demonstrate the effecti veness of the proposed model.