A write output driver with internal programmable pull-up resistive devices is disclosed. The sensor includes an in stack bias layer structure that is used to bias the magnetic moment of first and second free layers disposed at either side thereof. A highest selected bit is selected to be used in locating a final tuned value for the adjustment bit array. The SOC is operable to activate the first and second sets of FEMs, facilitate the first outbound RF signal representing the second inbound RF signal, and facilitate the second outbound RF signal representing the first inbound RF signal. wherein R is H, alkyl, heteroalkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, acyl, COOR1, carbamoyl or SO2R2 ; X is methylene, ethylene or propylene; and is a single bond or a double bond.