A read channel for at least partially offsetting nonlinear signal effects associated with the use of magneto-resistive heads

摘要

In accordance with one aspect of the invention, a device for use in a magnetic recording read channela (READ CHANNEL 1000) adapted to be coupled to a magneto-resistive (MR) read head (2000) comprises: an integrated circuit adapted (1100, 1105) so as to introduce a controllable amount of second-order nonlinearity into the magnetic recording read channel signal path to at least partially offset nonlinearity associated with use of the MR read head. In accordance with another aspect of the invention, a method of reducing nonlinear signal effects in a magnetic recording read channel signal path associated with use of a magneto-resistive (MR) read head comprises the step of: introducing into the read channel signal path a scalable square of the read channel signal. IMAGE