Low-power charge-sharing ROM using dummy bit lines

Abstract

This paper proposes a shared-capacitor charge-sharing ROM (SCCS-ROM). The SCCS-ROM reduces the swing voltage using the charge-sharing technique of the charge-sharing ROM (CS-ROM) [4]. Although the CS-ROM needs three small capacitors per output, the SCCS-ROM shares the capacitors so that it needs only three capacitors. The SCCS-ROM implements the capacitors using dummy bit lines. This not only increases noise immunity but also reduces power. The simulation results show that the SCCS-ROM reduces 8.4% power compared to the CS-ROM.