STRUTTURA D'INTERCONNESSIONE DI CIRCUITI INTEGRATI

摘要

A small variable resistor is used as a precision terminating resistor in an integrated circuit interconnection structure. The structure involves the use of a driver circuit connected to and driving a plurality of loads which are connected to a transmission line. The transmission line is terminated by the precision variable terminating resistor. The last load in the series of loads is located in the integrated circuit chip which has the variable terminating resistor. The absolute value of the variable resistor is difficult to control. The absolute value of any conventional integrated resistor is hard to control in manufacturing. However, by making the value of the resistance proportional to a voltage which itself is proportional to a deviation from a reference voltage, it is possible to obtain a much more precise value of resistance.