A termination network and a control circuit

H - Electricity – 04 – B

Patent

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Details

H04B 1/18 (2006.01) H03H 11/28 (2006.01) H04B 3/02 (2006.01)

Patent

CA 2181678

A termination network in an integrated circuit and a control circuit for controlling the impedance of the termination network is described. The termination network comprises transistors for matching the impedance of the termination network with the characteristic impedance of a transmission line, which is connected to the termination network. The control circuit comprises a reference transistor which is integrated on the same integrated circuit as the termination network. The control circuit senses the impedance of the reference transistor and controls the reference transistor and the transistors in the termination network in such a way that the impedance is not affected by variations in temperature and in the manufacturing process of the integrated circuit.

Réseau de terminaison dans un circuit intégré, et circuit de commande destiné à réguler l'impédance du réseau de terminaison. Le réseau de terminaison comprend des transistors adaptant l'impédance du réseau de terminaison à l'impédance caractéristique de la ligne de transmission qui est connectée à ce dernier. Le circuit de commande comporte un transistor de référence intégré dans le même circuit intégré que le réseau de terminaison. Le circuit de commande capte l'impédance du transistor de référence et gère le transistor de référence ainsi que les transistors dans le réseau de terminaison de sorte que l'impédance ne soit pas modifiée par des variations de température et dans le procédé de fabrication du circuit intégré.

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