BRIDGE-TAP EQUALIZER METHOD AND APPARATUS

摘要

An equalizer (100) is suitable for removing the delay distortion from a switched digital signal received from a telephone channel where the delay distortion is caused by a bridge-tap connected to the telephone channel. The equalizer includes a feedback delay circuit (200) which is arranged to delay the output signal (150) by an amount of time based on the square of the predominant frequency of the output signal. The resulting delayed feedback signal (130) is then combined with the input signal, thereby compensating for the delay distortion. The equalizer also includes an amplifier (103) which may be adjusted to compensate to the attenuation distortion caused by the bridge tap.