METHOD AND APPARATUS FOR CORRECTINGIMPERFECTLY EQUALIZED BIPOLAR SIGNALS

摘要

An apparatus (10) for correcting imperfectly equalized bipolar signals includes a delay line (12) having a reset control, and an AND gate (14), and a one-shot multivibrator (16). The apparatus is used in conjunction with an adaptive equalizer with the output of the adaptive equalizer coupled to the input of the apparatus. The output of the equalizer is coupled to the input and reset of the delay and to one input of the AND gate. The output of the delay line is coupled to the other input of the AND gate. The output of the AND gate is coupled to the input of the one-shot multivibrator (16a) and the output of the one-shot multivibrator (16b) is a corrected signal. The delay line is approximately equal to the pulse width of an erroneous pulse expected from over-equalization. When the delayed signal is compared to the original signal via the AND gate, narrow pulses are removed from the signal. Each pulse entering the magnet one shot multivibrator from the output of the AND gate cause a pulse of a set length to be generated by the one-shot multivibrator, containing pulses of equal length. If a pulse from the equalizer is too narrow to be a valid bit, the delay is reset.