Gain scaling of oversampled analog-to-digital converters

摘要: Method of operation an A/D converter having oversampling front end quantizer coupled to a digital decimation filter. The method includes setting effective feedback reference voltage value that is predetermined factor greater than specified maximum analog input voltage; and increasing the gain filter by amount substantially equal factor. In accordance with another aspect invention, delta-sigma modulator wherein full-scale set below factor; and, impulse-response coefficients output are selected provide when applied input.