Write head fault detection circuit and method

专利名称：Write head fault detection circuit and

method

发明人：Hong Jiang,Paul Merle Emerson申请号：US09621107申请日：20000721公开号：US066870B1公开日：20040203

专利附图：

摘要：A circuit () and method for detecting faults of a write head () of a hard-disk drivesystem (). A first resistor Rand a second resistor Rare coupled to coil L of write head (). Atransistor Qis coupled to a common node of resistor Rand R. Current Iis applied to the

coil L, and voltages Vand Vacross the nodes at either end of resistors Rand Rare analyzedin order to detect faults on write head coil L. The detection is performed during a quietmode of the hard-disk drive system (), so the fault detection is frequency-independent.Open faults are distinguishable from short-to-ground faults by the write fault detectioncircuit ().

申请人：TEXAS INSTRUMENTS INCORPORATED

代理人：W. Daniel Swayze, Jr.,W. James Brady,Frederick J. Telecky, Jr.

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