专利名称：Write head fault detection circuit and
method
发明人：Jiang, Hong,Emerson, Paul M.申请号：EP01000314.3申请日：20010723公开号：EP1174859A3公开日：20070418
专利附图：
摘要：A circuit (30, 40) and method for detecting faults of a write head (18) of a hard-disk drive system (70). A first resistor R1 and a second resistor R2 are coupled to coil L ofwrite head (18). A transistor Q1 is coupled to a common node of resistor R1 and R2.
Current I0 is applied to the coil L, and voltages Vab and Vac across the nodes at eitherend of resistors R1 and R1 are analyzed in order to detect faults on write head coil L. Thedetection is performed during a quiet mode of the hard-disk drive system (70), so thefault detection is frequency-independent. Open faults are distinguishable from short-to-ground faults by the write fault detection circuit (30, 40).
申请人：TEXAS INSTRUMENTS INCORPORATED
地址：7839 Churchill Way Mail Station 3999 Dallas, Texas 75251 US
国籍：US
代理机构：Holt, Michael
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