A gain error correction (GEC) technique is presented that continuously measures and digitally compensates for analogue gain errors present in each stage of a pipelined analogue-to-digital-converter (ADC). Simulations with and without the GEC technique indicate that the technique results in a large improvement in the signal-to-noise-and-distortion (SINAD) and spurious-free-dynamic-range (SFDR) of the converter.