Delta-sigma modulator for an analogue-to-digital converter with only one feedback coefficient

摘要

Disclosed is a delta-sigma modulator (or noise shaper) having resolution over 18 bits. The delta-sigma modulator may increase the linearity and decrease its size, by employing only one feedback loop path and applying a coefficient of less than 1 to the integrators. Also, the delta-sigma modulator according to the present invention may be used for the analogue-to-digital convertor with the reduction of the effective value of capacitor. In the case where the decimal values are corrected to digital values, it is possible to design the digital noise shaper which is used in the digital-to-analogue convertor.