A novel feed-forward compensation technique for single-stage fully-differential CMOS folded cascode rail-to-rail amplifier

被引：0
|
作者：
S. M. Rezaul Hasan
Nazmul Ula
机构：
[1] Massey University,Computer Engineering, Institute of Information & Mathematical Sciences
[2] Loyola Marymount University,Department of Electrical Engineering
来源：
Electrical Engineering | 2006年 / 88卷
关键词：
Single-stage rail-to-rail OTA; Phase margin; CMOS; Folded cascode; compensation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper presents a novel active and passive mixed feed-forward compensation technique for single-stage CMOS folded-cascode rail-to-rail operational trans-conductance amplifiers (OTA). Simulations using 0.5 μm Agilent CMOS process parameters indicate a phase margin of around 82° with an unity gain bandwidth of 320 MHz (@1.17 pF capacitive load including the device parasitics). Also, the compensated OTA provided over 60 dB DC-gain with rail-to-rail output voltage swing as well as wide input common-mode range. This ensures optimum step response (fast and accurate settling without ringing) for the feedback amplifier in switched-capacitor signal processing applications. An improved ``fast sensing'' common-mode feedback circuit with high common-mode gain is also used for the single-stage cascode OTA.
引用
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页码：509 / 517
页数：8
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