A 0.25-V Rail-to-Rail Three-Stage OTA With an Enhanced DC Gain
IEEE Transactions on Circuits and Systems II: Express Briefs（2020）
摘要
This brief proposes a 0.25V rail-to-rail three stage OTA. The proposed OTA improves a DC gain by inserting an NMOS gate-driven amplifier into the conventional bulk-driven OTA. In addition, it uses an asymmetric self-cascode transistor and an indirect feedback compensation to enhance a DC gain and an unit-gain frequency. At the first stage, the bulk-driven amplifier has a rail-to-rail input, but it...
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关键词
capacitors,circuit feedback,CMOS analogue integrated circuits,compensation,low-power electronics,operational amplifiers,transistor circuits
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