CPC G11B 5/607 (2013.01) [G11B 5/6017 (2013.01)] | 20 Claims |
1. A system for determining a fly height, comprising:
a first head of a disk drive, the first head being adjacent to a first disk;
a capacitive fly height sensor circuit coupled to the first head, wherein the capacitive fly height sensor circuit is configured to measure a first capacitance between the first head and the first disk;
a reference sensor circuit, wherein the reference sensor circuit is configured to experience a same thermal drift as the capacitive fly height sensor circuit; and
a logic circuit, the logic circuit being coupled to the capacitive fly height sensor circuit and the reference sensor circuit, wherein the logic circuit is configured to:
remove noise to correct a measurement of the capacitive fly height sensor circuit using a measurement of the reference sensor circuit; and
determine the fly height between the first head and the first disk using the corrected measurement of the capacitive fly height sensor circuit.
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