| 摘要 |
A mismatch shaped analog to digital converter. The novel analog to digital converter includes a first circuit for providing a plurality of reference voltages, a plurality of comparators adapted to compare an input signal with the reference voltages, and a second circuit for randomizing connections between the reference voltages and the comparators. The connections are randomized such that noise caused by mismatch errors is spectrally shaped according to a desired noise-shaping characteristic. In an illustrative embodiment, the second circuit includes a noise-shaping circuit comprised of a plurality of Delta-Sigma modulators for generating one or more control signals, and a router for connecting the reference voltages to the comparators in accordance with the control signals. The mismatch shaped analog to digital converter can be used within a Delta-Sigma modulator to shape noise caused by mismatch errors in the feedback digital to analog converter.
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