Internal-states beat-frequency ADC using a subcircuit sharing architecture for SNDR improvement with decreased area tradeoff

Abstract

Beat-frequency ADCs emerged as a good choice for applications where low power consumption is important. However, there is a tradeoff between circuit power/area and quantization resolution. An Internal-states Beat-frequency ADC with subcircuit sharing is proposed to improve resolution while reducing the tradeoff. It was observed that SNDR/ENOB were improved by an average of 6.72dB/1.14 bits by using the internal-states analysis without increasing system-wide area/power by means of the subcircuit sharing design method, thus alleviating the previously existing tradeoff.