Efficient Linearization of Sigma-Delta Modulators with Digital-Domain Dithering
A new technique is presented for dithering single-bit sigma-delta modulator (SDM) ADCs and DACs in the digital domain. The system operates by detecting and randomizing the limit cycles responsible for baseband tones. The system is efficient to realize in hardware and avoids the implementation problems of analog dither required in conventional SDM ADCs.
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