A Novel Power Optimization Method by Minimum Comparator Number Algorithm for Pipeline ADCs

摘要

The effects of stage numbers on power dissipation of pipeline analog-to-digital converter(ADC) are studied and a novel design method aiming for power optimization is presented. In this method,a minimum comparator number algorithm(MCNA) is first introduced,and then the optimum distribution of resolutions through pipeline ADC stages is deduced by MCNA. Based on the optimum stage-resolution distribution,an optimization method is established,which examines the precise function between ADC power and stage resolutions with a parameter of power ratio(Rp). For 10-bit pipeline ADC with scaling down technology,the simulation results by using MATLAB CAD tools show that an eight-stage topology with 1-bit RSD correction achieves the power optimization indicated by the power reduction ratio.