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Method and apparatus for providing thermal asperity compensation in a fixed delay tree search detector
Method and apparatus for providing thermal asperity compensation in a fixed delay tree search detector
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机译:在固定延迟树搜索检测器中提供热粗糙补偿的方法和设备
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摘要
The present invention is a method and apparatus for removing transient DC level shifts caused by thermal asperities. A read signal is generated by a transducer in response to proximate contact between the transducer and magnetic flux fields recorded on a magnetic media surface. The read signal is provided to a continuous time filter and a sampler. During normal operation, the output of the sampler is provided directly to a fixed delay tree search detector. Upon encountering a thermal asperity, the output of the sampler is first provided to a 1-D sampled filter which removes the DC shift caused by the thermal asperity and then to the fixed delay tree search detector, which provides signal recovery. A multiplexer provides selection of the output signal from between sampler and the 1-D sample filter.
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