Abstract
The ring amplifier is an alternative to an OTA for its low power consumption and large output swing. Since when the ring amplifier operates in a stable state, its output current is so small that cannot lead to large voltage settling. Its settling accuracy is also determined by its large signal settling. An analysis on the settling procedure is provided in the paper that separates the settling into three periods. Based on the analysis, two high linearity ring amplifiers are proposed in this paper with more than 80-dB SFDR in a 2 times sample and hold circuit.
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