Abstract

New passive capacitor mismatch error-averaging techniques for pipelined analog-to-digital conversion is presented. The excellent linearity inherent to the architecture effectively eliminates the capacitor matching requirement that prevents a conventional monolithic pipelined analog-to-digital converter from reaching a 10-bit and above integral nonlinearity (INL) without trimming and/or calibration. Simulation results confirm the observation and a case of 14 bit INL realized by 7 bit capacitor matching is shown. The relaxed matching requirement enables the scale-down of the capacitor sizes to that of the KT/C limit. As a result, great reductions in both power consumption and chip area can be achieved.

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