Three-Stage OTA Frequency Compensation Technique with RNMC

This report investigates a three-stage OTA frequency compensation technique utilizing reversed nested miller compensation (RNMC), feedforward attenuation, and feedback amplification to improve gain bandwidth (GBW) and DC gain in CMOS amplifiers. The study begins with an abstract summarizing the research, followed by a detailed literature review of existing frequency compensation methods like FNMC, NMC, ACBS, and GMCNM, highlighting the advantages of RNMC. The research hypothesis proposes that the GBW of a three-stage amplifier can be enhanced using feedforward attenuation and feedback amplification. The report includes circuit schematics, transfer function derivations, and analysis of poles, zeros, and stability criteria using Routh-Hurwitz. Simulation results using HSPICE and 0.18 um TSMC CMOS technology are presented, including corner analysis and comparisons with other works. The report also covers the aspect ratios of MOSFETs, comparisons with other research, and a conclusion emphasizing the improved performance of the proposed technique. The assignment includes a research plan with hypothesis, methods, data analysis, and expected outcomes, along with a time plan, resource estimates, and budget in Appendix A, demonstrating the student's understanding of the lecture material and workshops.