Patent ID: 11953987
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. The read channel circuit of claim 1, wherein:
filter output values from a training set of signal values are divided into at least an inner range, a first outer range, and a second outer range;
the set of finite impulse response filters are trained using:
a first training condition for adjusting weight coefficients for filter output values in the inner range;
a second training condition for adjusting weight coefficients for filter output values in the first outer range; and
a third training condition for adjusting weight coefficients for filter output values in the second outer range;

the first training condition includes correction based on correct state and incorrect state filter output values in the inner range;
the second training condition excludes correction of incorrect state filter output values in the first outer range; and
the third training condition excludes correction of correct state filter output values in the second outer range.