A Two-Stage Fully Differential Inverter-Based Self-Biased CMOS Amplifier With High Efficiency

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A two-stage fully differential CMOS amplifier comprising inverters as input devices and employing self-biasing techniques is presented. The proposed amplifier benefits from an optimum compensation through time-domain optimization which permits achieving high energy-efficiency. Moreover, it achieves the highest efficiency of its class and although it relies on a quasiclass- A topology, it is comparable to class-AB amplifiers. Detailed circuit analyses such as differential-mode, common-mode feedback, noise, and slew rate are carried out. Based on these analyses, a manual design methodology and genetic algorithm based optimization is presented. Finally, the most relevant experimental results for an integrated circuit prototype designed in a 0.13μm 1.2 V standard CMOS technology are shown.
Original languageUnknown
Pages (from-to)1591-1603
JournalIeee Transactions On Circuits And Systems I-Regular Papers
Issue number7(SI)
Publication statusPublished - 1 Jan 2011

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