Offset compensation in comparators with minimum input-referred supply noise |
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Authors: | Wong K.-L.J. Yang C.-K.K. |
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Affiliation: | Univ. of California, Los Angeles, CA, USA; |
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Abstract: | The resolution of a comparator is determined by the dc input offset and the ac noise. For mixed-mode applications with significant digital switching, input-referred supply noise can be a significant source of error. This paper proposes an offset compensation technique that can simultaneously minimize input-referred supply noise. Demonstrated with digital offset compensation, this scheme reduces input-referred supply noise to a small fraction (13%) of one least significant bit (LSB) digital offset. In addition, the same analysis can be applied to analog offset compensation. |
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