Some improvements in the implementation of multithreshold and multivalued I2.L circuits

After a brief analysis of some problems that arise in the implementation of multi-threshold and multivalued I2L circuits, a global solution for these problems is proposed based on a proper dimensioning of the current mirrors. This solution implies an adequate design of the circuit layout, but the manufacturing process can be the same as for the binary I2L circuits. The problems posed and its practical solutions are checked by simulation with SPICE2 of two circuits: a comparator circuit to detect three current thresholds, and a new 4-bits adder with lookahead carry.