| 摘要 |
<p>An apparatus and method for detecting magnetic data on media is disclosed which utilizes an array of horizontal magnetoresistive sensors. The present invention detects the pitch or separation of parallel magnetic transition data (12) on the magnetic medium (15) under test, and generates a signal that is independent of the velocity of the medium. In one embodiment, the magnetoresistive sensors (1) employed in an array are spaced apart a distance (d) of which corresponds to the separation of magnetic transition data of interest, and the output of each sensor (1) is connected to a voltage adder (8). The signal from the voltage adder (8) is at a maximum when the separation of the magnetic transition data corresponds to the sensor separation. A peak detector (10) is connected to the output of each voltage adder to indicate when a medium having a particular magnetic transition data pattern is detected.</p> |
