Random interleaving dither for sigma-delta analog-to-digital converters

摘要

A dithering method is provided for sigma-delta converters in a deep-submicron process. The dither is a random interleaving of quantizer thresholds levels. The random interleaving dither is more effective than previous static dither methods to remove idle channel tones of sigma-delta analog-to-digital converters (ADC). The dither is easy to implement and takes less area than other dynamic dither methods.