Adaptive equalizer

Details Adaptive equalizer Adaptive equalizer

H - Electricity

03

H

H03H 11/06 (2006.01) H03H 11/12 (2006.01) H03H 21/00 (2006.01)

Patent

CA 2217985

An equalizer comprising a pair of high pass filters for receiving an input signal, each filter having gain, a first of the filters having gain which is substantially flat within its passband, a second of the filters having gain over a range of its passband which is controlled by an error signal, a differential amplifier for generating the error signal, having an output applied to a control input of the second filter, a pair of broadband amplitude peak detectors each for receiving an output signal of a respective one of the filters, apparatus for applying loop signals derived from outputs of the filters and passing though the peak detectors to corresponding inputs of the differential amplifier, apparatus for providing an offset to a loop signal derived from the output of the first filter, and apparatus for providing an output signal from the output of the second filter.

Égaliseur comprenant : une paire de filtres passe-haut pour recevoir un signal d'entrée, le premier de ces filtres ayant un gain essentiellement uniforme à l'intérieur de sa bande passante et le second ayant un gain sur une partie de sa bande passante, commandé par un signal d'erreur; un amplificateur différentiel pour générer le signal d'erreur, dont la sortie est appliquée à l'entrée de commande du second filtre; une paire de détecteurs de crêtes d'amplitude en bande large recevant chacun un signal de sortie d'un des filtres correspondant; un dispositif permettant d'appliquer aux entrées correspondantes de l'amplificateur différentiel, des signaux de boucle provenant des sorties de filtres et traversant les détecteurs de crêtes; un dispositif pour décaler un signal de boucle provenant de la sortie du premier filtre; et un dispositif pour produire un signal de sortie à partir de la sortie du second filtre.

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