Feipeng Huang, Yumei Huang, Dedong Ze, Zhiliang Hong
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A method to effectively decrease the settling time of gain-boost OTA
A method was proposed to decrease the settling time of gain-boost folded cascode operational trans-conductance amplifier (OTA). Through the small-signal analysis of gain-boost OTA, the expression of pole and zero was attained successfully; then the effect of pole-zero (doublet) on settling time was revealed fully. To reduce its effect, a method was finally proposed that the unity-gain frequency (omegaur) of regulation amplifier should be a little larger than the unity-gain frequency (omegauc) of core amplifier. This method was proven to be effective by simulation result
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