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CMOS全差分跨导运算放大器的建模与设计

Design and Modeling of a CMOS Fully Differential Transconductance Operational Amplifier
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摘要 研究带增益自举结构的高速、高增益跨导运算放大器,并对增益自举运放建立数学模型和进行Mat-lab仿真验证.将设计的运算放大器应用于12bit 100MSPS模数转换器(ADC)中,可得到辅助运放的带宽的最佳设计.仿真结果表明:添加辅助运放后,可以达到106dB的增益,增加了55dB;添加辅助运放后的主极点较之前大大减小,次主极点略有减小,但辅助运放的添加并不会影响运放使用时的速度. Research of high-speed and high-gain transconductance amplifier with the structure of gain-boost,the mathematical modeling and Matlab simulation is presented for gain-boost operational amplifier.Designed operational amplifier is used in 12 bit 100 M SPSADC,and the optimal design on the auxiliary amplifier bandwidth can be obtained.Simulation results show that gain is 106 dB which increses of 55 dB if an auxiliary operational amplifier is added.Besides,if we the auxiliary operational,dominant pole is greatly reduced and non-dominant pole slightly decreases,but the addition of auxiliary amplifier does not affect the speed of the operational amplifier.
作者 傅文渊 凌朝东
机构地区 华侨大学信息科学与工程学院 厦门市专用集成电路系统重点实验室
出处 《华侨大学学报（自然科学版）》 CAS 北大核心 2012年第1期23-26,共4页 Journal of Huaqiao University(Natural Science)
基金 国家自然科学基金资助项目(60772164) 福建省自然科学基金资助项目(T0850005)
关键词 运算放大器 全差分跨导 增益自举 模数转换器 互补金属氧化物半导体 operational amplifier fully differential transconductance gain-boosting analog to digital converter complementary metal-oxide-semiconductor
分类号 TP722.770.2 [自动化与计算机技术—检测技术与自动化装置]
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参考文献7

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二级参考文献11

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共引文献6

华侨大学学报（自然科学版）
2012年 第1期

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