Automatic equalizer

Details Automatic equalizer Automatic equalizer

H - Electricity

04

B

333/27, 328/0.2

H04B 3/14 (2006.01)

Patent

CA 1134916

- 15 - Abstract of the Disclosure An automatic equalizer comprises a transversal filter for receiving an input signal to be equalized and having adjustable tap gains, a circuit connected to receive an output signal of the transversal filter and the input signal to be equalized to produce an equalized output signal, a distortion detect circuit for detecting a distortion component included in the output signal, a tap gain correct circuit connected to receive a distor- tion detect signal from the distortion detect circuit to produce tap gain correct signals, and a tap gain hold circuit responsive to the tap gain correct signals to correct the tap gains of the transversal filter and hold the corrected tap gains. In order to eliminate the influence of DC offset component at the output of the distortion detect circuit on the signal equalization, a polarity inverting circuit is provided for synchronously and periodically inverting the polarity of a signal com- ponent included in the output signal of the distortion detect circuit and the polarity of the tap gain correct signals.

353714

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