Multiplexer circuit

H - Electricity – 03 – K

Patent

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Details

H03K 17/00 (2006.01) H01H 47/00 (2006.01) H03K 17/62 (2006.01) H03K 17/693 (2006.01)

Patent

CA 2588512

A relay switch is provided between the output terminal of each of multiplexers included in a certain layer of a tree structure and the input terminal of a multiplexer included in a layer immediately overlying the certain layer. The relay switch is turned on which is connected to each of ones of the multiplexers included in the certain layer and being currently related to a signal selection, while the relay switch is turned off which is connected to each of the other ones of the multiplexers included in the certain layer. In this way, the resistance and capacitance components of the multiplexers corresponding to the relay switches that are turned off can be separated from the tree structure to reduce the values of the time constants CR that affect the working speeds of the multiplexers. This eliminates the problem that the working speed of the whole multiplexer circuit is reduced due to increase of the time constants.

L'invention concerne un contacteur-relais entre la borne de sortie de chacun des multiplexeurs se trouvant dans une certaine couche d'une structure arborescente et la borne d'entrée d'un multiplexeur se trouvant dans une couche recouvrant immédiatement ladite couche. Le contacteur-relais est mis en marche lorsqu'il est connecté à chacun des multiplexeurs contenus dans ladite couche et alors il est placé en relation avec une sélection de signal, le contacteur-relais est mis hors circuit lorsqu'il est connecté à chacun des autres multiplexeurs contenus dans ladite couche. Ainsi les pièces de résistance et de capacité des multiplexeurs correspondant aux contacteurs-relais qui sont mis hors circuit peuvent être séparées de la structure arborescente afin de réduire les valeurs des constantes temporelles CR affectant les vitesses de travail des multiplexeurs. Cet agencement permet de résoudre le problème d'une vitesse de travail de tout le circuit multiplexeur ralenti du fait de l'augmentation des constantes temporelles.

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