Optimization of a voltage sense amplifier operating in ultra wide voltage range with back bias design techniques in 28nm UTBB FD-SOI technology

Advanced SoC designs regularly use Dynamic Voltage and Frequency Scaling (DVFS) to achieve high performance and low power targets of portable systems. In this paper, we focus on optimization of a Voltage Sense Amplifier (VSA) in 28nm Ultra-Thin Body and BOX Fully Depleted SOI (UTBB FD-SOI) technology to achieve high performance operations over the Ultra Wide Voltage Range (UWVR) from 1.3V to 0.4V. We use Flip-Well design methodology along with forward body bias modulation to extend operation range of the VSA and also reduce sense amplifier read time by 28%, while saving power consumption by up to 59% compared to Bulk technology.