| 摘要 |
<p>The circuit for detecting the read/write states of a FDD head to monitor the operation states of FDD, comprises a read/write detection unit (21) for detecting read/write signals from the head unit (20) to drive a LED driving unit (23). The LED driving unit (23) drives a number of light emitting diodes (24). A second controller (22) for controlling the head unit (20) is connected to a first controller (10) of the FDD for generating read/write control signals. The R/W detection unit (21) includes two operational amplifiers (IC1,IC2), two diodes (D1,D2) and two feedback resistors (R4,R8). The LED unit (24) displayes the read/write operations states of the FDD.</p> |
