Patent ID: 6272102
Filing Date: 2001-08-07
Classification: G11B

Abstract:
A detector comprising:first and second delay lines, each delaying the output of a stored value for a predetermined detection period;means for storing an average value of the maximum value of a detected signal during a detection instant in the first delay line in a different location for each of a predetermined number of detection instants within the detection period, the average being for the same instant in the detection period over multiple detection periods;means for storing an average value of the minimum value of the detected signal in the second delay line in a different location for each detection instants, the average being for the same instant in the detection period over multiple detection periods;means for determining an average level between the average maximum and minimum values for each detection instant depending on the output signals of the two delay lines; andmeans for comparing a detected signal for a detection instant with the average level for the detection instant so as to provide a detection signal.