公开(公告)号：US11756582B1

公开(公告)日：2023-09-12

申请号：US17742202

申请日：2022-05-11

申请人： STMicroelectronics, Inc. ,  STMicroelectronics S.r.l.

发明人： Paolo Pulici ,  Dennis Hogg ,  Michele Bartolini ,  Enrico Sentieri ,  Enrico Mammei

IPC分类号： G11B5/60 ,  G11B21/10

CPC分类号： G11B5/6017 ,  G11B21/106

摘要： A system for determining a fly height includes a first head of a disk drive, a second head of the disk drive, a capacitive sensor circuit coupled to the first head and the second head, and a logic device coupled to the capacitive sensor circuit. The capacitive sensor circuit is configured to measure a first capacitance between the first head and the first disk, remove noise from the first capacitance using a second capacitance between the second head and the second disk, and based thereon determine a corrected first capacitance. The logic device is configured to determine the fly height between the first head and the first disk using the corrected first capacitance.