Active intelligent termination

H - Electricity – 03 – H

Patent

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Details

H03H 11/28 (2006.01) G06F 13/00 (2006.01) G11C 5/06 (2006.01) G11C 7/10 (2006.01) H03K 5/1252 (2006.01)

Patent

CA 2069658

An active intelligent termination circuit is designed to function as a self-switching clamp adapted to attenuate unwanted signals on a data bus. A field effect transistor is switched on or off in a conducting mode or non-conducting mode respectively in accordance with the data transmitted on the data bus. Any low level unwanted signals which may appear on the bus when data having a voltage level corresponding to a logic zero is present will be attenuated by the field effect transistor which is coupled to both the data bus and to a ground plane. The field effect transistor switches to the non-conducting mode when data corresponding to a logic level one is transmitted on the bus.

L'invention est un circuit de terminaison intelligent actif conçu pour fonctionner comme dispositif de calage à autocommutation adapté pour affaiblir les parasites sur un bus de données. Un transistor à effet de champ est commuté à l'état conducteur ou à l'état non conducteur selon les données transmises sur le bus. Les parasites de faible niveau qui peuvent se manifester sur le bus quand des données ayant un niveau de tension correspondant au niveau logique zéro sont présentes seront affaiblis par le transistor à effet de champ, lequel est couplé au bus de données et à un tapis de sol. Le transistor à effet de champ passe à l'état non conducteur quand les données correspondant au niveau logique un sont transmises sur le bus.

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