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

作者：Figueiredo Michael^*; Santos Tavares Rui; Santin Edinei; Ferreira Joao; Evans Guiomar; Goes Joao

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2011, 58(7): 1591-1603.

DOI：10.1109/TCSI.2011.2150910

• Amplifier
• CMOS analog integrated circuits
• fully differential
• inverter
• operational transconductance amplifier
• self-biased

A two-stage fully differential CMOS amplifier comprising inverters as input structures 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 quasi-class-A topology, it is comparable to class-AB amplifiers. Detailed circuit analyses such as differential-mode, common-mode feedback, noise, slew rate, and input/output range are carried out. Based on these analyses, a manual design methodology and a genetic algorithm based optimization are presented. Finally, the most relevant experimental results for an integrated circuit prototype designed in a 0.13 mu m 1.2 V standard CMOS technology are shown.

• 出版日期2011-7