Current-mode multiple valued logic circuit by merged Bi-CMOS transistors

The authors present a current-mode multiple-valued logic circuit by merged Bi-CMOS transistors. This circuit is composed of a current mirror, threshold detector, and current source. The circuit has the advantages of high accuracy, high density, and high speed, making it possible to realize high-radix multiple-valued logic circuits. As an application of the proposed circuit, a parallel counter is presented. This circuit operates with higher speed than conventional circuits, so it is useful for the parallel counter-type multiplier. Circuit simulation for the proposed circuit has been performed using the SPICE2 program