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This paper presents a low delay dispersion comparator for low cost level-crossing Analog-to-Digital converters. The conventional comparator circuit is modified by adding a variable driving-current block (VDCB) which is used such that it supplies the output node of the differential amplifier with a current that is inversely proportional with the level of input signal. The modification incurs small...
This paper presents a new technique to compensate the comparator delay dispersion caused by variable input overdrive. The technique is composed of three main blocks, namely, conventional comparator, fixed delay block and variable delay block. The variable delay block is controlled such that it implements the inverse overdrive-delay characteristics of the conventional comparator. Therefore, the overall...
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