Multiple-valued mask-programmable logic array using one-transistor universal-literal circuits

Abstract

This paper presents a compact multiple-valued mask-programmable logic array (MPLA) based on a MIN/TSUM (MINimum/Truncated-SUM) two-level synthesis. A universal literal in the MIN plane is decomposed into a threshold literal and a logic-value conversion (LVC) that is shared in the same column of the MIN plane. Since a threshold literal can be designed by using a single floating-gate MOS transistor, a compact MIN plane can be implemented in the proposed MPLA. Any arbitrary universal-literal circuits can be realized by programming the threshold voltage of the corresponding floating-gate MOS transistor and selecting an appropriate LVC as an input variable. The performance of the proposed MPLA is evaluated under a 0.8 /spl mu/m CMOS design. It is demonstrated that its performance is superior to that of conventional PLA's.