Patent ID: 6256159
Filing Date: 2001-07-03
Classification: G11B

Abstract:
A digital dibit detector, comprising:a band pass filter connected to receive a sampled signal to produce a filter output signal;a magnitude qualification circuit to compare an absolute value of the filter output signal to a programmable qualification threshold value to produce a qualified magnitude output signal;a polarity qualification circuit to compare a sample polarity of the filter output signal to a programmable dibit polarity to produce a qualified polarity output signal;a local peak qualification circuit to qualify a largest sample magnitude of the filter output signal within a window as a peak to produce a peak output signal;a circuit to receive said qualified magnitude output signal, said qualified polarity output signal, and said peak output signal, to produce a dibit detection signal when said qualified magnitude output signal, said qualified polarity output signal, and said peak output signal are of the same state.