Low-power circuits are highly in demand in this power-hungry world of batteries and portable devices. Though many low-power techniques are prevalent at various stages of a VLSI design cycle, but most of them have retained their own domain. A novel, digital-in-concept, fully differential voltage comparator circuit has been implemented in this paper. This provides substantial reduction in the power consumption. It is highly cost-effective, both in terms of time and efforts as an analog circuit is being designed on digital basis. The proposed voltage comparator has been designed and simulated in Cadence[Formula: see text] Virtuoso Analog Design Environment using UMC 180[Formula: see text]nm CMOS technology at 1.8[Formula: see text]V supply.