Improved Low-Power Low-Voltage CMOS Comparator for 4-Bit Flash ADCS for UWB Applications

Abstract

In this paper we propose a novel comparator structure, to be used in low-resolution ultra-high-speed ADCs that improve the energy-efficiency. In this comparator, the pre-amplification is embedded in the input switched-capacitor network by using the passive-amplification capability of MOS devices. Simulated results show that this comparator exhibits low-offset ultra-fast regeneration-time and high energy-efficiency.