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Cai, Liying (author), Lu, Zhenghao (author), Tang, Z. (author), Yu, Xiaopeng (author)This letter presents a low-power dB-linear variable gain amplifier (VGA) with a small linear-in-dB error over a wide gain tuning range. An exponential current ratio is realized in the linear-in-dB control circuit based on the subthreshold I-V characteristic. The VGA is built with subthreshold common-gate transistors as current steering,...journal article 2022