A/D converting circuit

摘要

The present invention has an object to provide an A/D converting circuit with improved accuracy in an output. In this invention, the initial electric charge is given to a capacitive coupling for outputting in a quantizing circuit so as to cancel the dispersion of thresholds of MOS inverter in the quantizing circuit, the supply voltage of the first and the second inverters is higher than the supply voltage of an inverter for quantizing, as well as the initial electric charge is given to a capacitance for input in order to limit the function of the quantizing circuit within the linear area of the first and the second inverters. <IMAGE>