A distortion compensating flash Analog-to-Digital conversion using bootstrap switch

Abstract

This paper proposes Flash Analog to Digital Converter design that reduces static nonlinearity of the track & hold circuit, by that high speed and high linearity obtained at the same time. Comparator is designed using latch type voltage sense amplifier. The sense amplifier is designed with separated input and regeneration stage. This separation offers fast operation over a wide common mode and supply voltage range. Apart from sense amplifier this Analog to Digital converter design uses Thermometer code generator circuit followed by encoder. The input is sampled and held by (S/H) circuit so that there is no need to use bubble correction logic in the design.