| 摘要 |
PURPOSE: A thermal asperity detecting method and a detecting circuit are provided to detect whether a magnetic resistor element is contacted to a magnetic record medium. CONSTITUTION: The thermal asperity detecting method comprises the steps of: detecting an amplitude of an output of a magnetic resistor element to prepare a slice level of m times (m>1) of an output level; and comparing an output signal(RS) from the magnetic resistor element and the slice level(SL) to generate a thermal asperity detection signal(TAF), wherein the step of detecting further comprises eliminating a low frequency component of an output of the magnetic resistor element. Thereby, since a slice level is automatically prepared according to a characteristic of each magnetic resistor element, a thermal asperity of each magnetic resistor element can be detected accurately.
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