Abstract
A novel technique for implementing noise-shaping in time-interleaved SAR ADCs is presented. The noise-shaping is implemented passively and is easily reconfigured from first to second order. In both cases it achieves better SNR improvement than a conventional loop filter for a range of low OSR, and without the need for a power-hungry integrator. The architecture provides an energy-efficient ADC solution for a wide range of sample rates and resolution. To the best of the authors' knowledge, it is the first example of a noise-shaped ADC with more than two interleaved channels.
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