Servo head with close servo transducer placement for improved passive noise cancellation

摘要

A servo head in a disk file data storage system includes two servo transducers which are connected so that noise induced by a nearby writing data head cancels. The first servo transducer, mounted on a slider, reads information stored on a servo disk. A second servo transducer, also located on the slider, is connected to the first servo transducer to produce an output signal so that noise signals induced in the first servo transducer by operation of the data transducer tend to be canceled by noise signals induced in the second servo transducer by operation of the data transducer. The two servo transducers are located such that they are closely spaced relative to the size of the servo transducers. The close proximity of the two servo transducers reduces the effect of unequal shielding from noise signals induced in the two servo transducers by the data head.