Auto-calibrated D-A converter

摘要

A plurality of code signal generators are provided, respectively corresponding to bits of a digital signal to be converted. Each of the code signal generators generates a pulse signal having a duty ratio corresponding to the weight of the corresponding bit of the digital signal. The pulse signal is smoothed to provide a DC output corresponding to the weight of the bit. The outputs from the code signal generators corresponding to the respective bits of the input digital signal are summed by a summing circuit to obtain an analog converted output.