An Algorithmic 15b Cmos Digital-to-Analog Converter

DIGITALTO-ANALOG CONVERTERS for digital audio equipment can be realized in CMOS switched-capacitor technology by means of algorithmic principles’”. The major problem which has to be solved in these high-resolution converters is non-mouotonicity due to offset or mismatching in capacitor values. The 15b DA converter to be presented in this paper is based on an algorithm which ensures monotonicity despite offset and capacitor mismatch. For the implementation of an N-bits converter with the algorithm, the basic DA conversion formula is rewritten: