Pipelined a/d converter and method for correcting output of the same

摘要

Analog inputs to a controllable stage can be switched by an input selecting section, while digital inputs to a D/A converter in the controllable stage can also be switched. An error calculation section calculates an error in the output of the pipelined A/D converter caused by an error in the analog output of the controllable stage, based on the output of the pipelined A/D converter produced when the controllable stage is in a given input state, and an expected value thereof. A correction value generation section generates a correction value for correcting the output of the pipelined A/D converter, based on the calculated error. An output correction section corrects the output of a digital calculation section based on the generated correction value.