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一种输入输出轨到轨CMOS运算放大器的设计 被引量：15

An Input Output Rail-to-rail CMOS Operational Amplifier Design
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摘要 随着电源电压的日益降低,信号幅度不断减小,在噪声保持不变的情况下,信噪比也会相应地减小。为了在低电源电压下获得高的信噪比,需提高信号幅度,而输入输出轨到轨运算放大器可获得与电源电压轨相当的信号幅度。中文在理论分析了输入输出轨到轨CMOS运算放大器主要架构优缺点后,给出了一种新的输入输出轨到轨CMOS运算放大器的设计,该电路在华润上华0.18μm工艺平台上流片验证。测试结果表明,输入范围从0到电源电压,输出范围从50 m V到电源电压减去50 m V,实现了输入输出轨到轨的目标。 With the power supply decreases gradually, the amplitude of the signals reduce at the same time. However the noise level retains which leads to the signal-to-noise ratio （SNR） being worse. To get higher SNR under lower power supply, the amplitude of signals should be enhanced. Input and output rail-to-rail operational am- plifiers can get amplitude near to power supply rails. Firstly theoretical analysis of advantage and shortcomings of input output rail-to-rail CMOS operational amplifier main structure is developed, then the paper presents a new design of an input and output rail-to-rail operational amplifier. The circuit was taped out and verified on CSMC＇s 0. 18μm process. Test results show that the input range could be from 0 to power supply and the output range could be from 50mV to power supply minus 50mV, which achieves the target of input＇s and output＇s rail-to-rail.
作者 李有慧
机构地区 无锡华润上华科技有限公司上海分公司
出处 《电子科技》 2015年第6期165-169,共5页 Electronic Science and Technology
关键词 CMOS 轨到轨 运算放大器 米勒补偿 CMOS rail-to-rail operational amplifier miller comnan^t~,~,,
分类号 TN432 [电子电信—微电子学与固体电子学] TN722 [电子电信—电路与系统]
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参考文献10

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二级参考文献7

  • 1BOTMA J H.A Low-Voltage CMOS Operational Amplifier with a Rail-to-Rail Constant-gm Input Stage and a Class AB Rail-to-Rail Output Stage[C]. Proc ISCAS,1993,93:915-923.
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  • 7Hurst P J,Lewis S H,Keane J P, et al.Miller compensation using current buffers in fully differential CMOS two-stage operational amplifiers[J].IEEE Trans Circuits Syst 1,2004,51:275.

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二级引证文献29

电子科技
2015年 第6期

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