Patent ID: 7733593

Claim:
A method for controlling a write equalization level in a magnetic recording device, comprising the steps of: providing a write data signal; providing a write equalization encoding signal for combination with the write data signal; converting the write data signal and write equalization signal combination from a digital signal to an analog signal in a converter; transmitting said write equalization signal and said write data signal from said converter into a transmission line; forwarding said write equalization signal and said write data signal from the said transmission line to a write head; and providing an impedance mismatch between an output of said converter and an input of said transmission line for at least one of said write equalization signal and said write data signal, an impedance of said output of said converter for said write equalization signal differing from an impedance of said output of said converter for said write data signal to cause a difference in a level of the write equalization signal provided to said write head as compared to a level of the write data signal provided to said write head.