A low-cost and low-latency inter-stage nonlinearity error calibration algorithm for pipelined ADCs

Pipelined analogue-to-digital converters suffer from inter-stage gain errors and inter-stage nonlinearity errors due to gain variations and nonlinearity in residue amplifiers. While a polynomial-based calibration algorithm can address these errors, its conventional implementation demands excessive hardware resources and power consumption. This letter introduces a novel calibration algorithm that combines precomputation with a lookup table, achieving improved hardware efficiency while maintaining calibration accuracy and reducing latency.