Four stage CMOS operational amplifier, frequency compensated via active miller network

Author:

Attar Mahdis1ORCID,Dehbovid Hadi2,Ghorbani Alireza1,Adarang Habib2

Affiliation:

1. Department of Electrical Engineering Sari Branch, Islamic Azad University Sari Iran

2. Department of Electrical Engineering Nour Branch, Islamic Azad University Nour Iran

Abstract

AbstractA four‐stage CMOS operational amplifier is proposed in this work. The designed amplifier is frequency compensated via two differential blocks and two Miller capacitors. Unlike well‐known frequency compensation methods, the proposed compensation leaves the output node while exploiting extremely smaller capacitors compared to conventional approaches. The presented approach is modeled symbolically and realized at the circuit level via the Hspice circuit simulator and 0.18 μm CMOS technology. Good agreements between two separate simulation paths verify the validity and accuracy of the proposed approach. Ample simulation results are reported to investigate the proposed amplifier regarding parameter mismatches. According to the simulation results, the proposed four‐stage amplifier is an excellent candidate to be used in larger systems such as data converters, modulators, and sensors while it shows more than 169 dB as DC‐gain, 10 MHz as unity gain frequency with power consumption less than 500 μW.

Publisher

Wiley

Subject

General Engineering,General Computer Science

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Recycling folded cascode two-stage CMOS amplifier;Memories - Materials, Devices, Circuits and Systems;2023-12

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