New Linearity Error Correction Technology for A/D and D/A Converter LSI

To realize a high precision monolithic A/D and D/A converter, new error correction technology labeled LEGS (Linearity Error Correction by Digital Code Shift) that utilizes fully digital processing and a two stage weighted capacitor array is proposed. This technology has the advantage that it provides a significant reduction in required tolerance for weighting network components as well as a number of highly precise analog circuits. This paper describes the basic correction approach, its effectiveness, and a 14-bit accuracy A/D and D/A converter configuration based on this correction technology.