CMRR frequency response of CMOS operational transconductance amplifiers

被引：15

作者：

Giustolisi, G ^{[1
]}

Palmisano, G ^{[1
]}

Palumbo, G ^{[1
]}

机构：

[1] Univ Catania, Dipartimento Elettr Elettron & Sistemist, I-95125 Catania, Italy

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2000年 / 49卷 / 01期

关键词：

CMOSFET amplifiers; CMRR; differential amplifiers; frequency domain analysis; frequency response; instrument response; instrument amplifiers; operational amplifiers;

D O I：

10.1109/19.836324

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper an accurate and complete analysis of the CMRR for the most commonly used CMOS OTA's has been carried out. The analysis provides equations which can profitably be used in the design of high-accuracy integrated amplifiers to be employed in instrumentation circuits. The analysis shows that the CMRR of these circuits is highly affected by two poles which are caused by the zeros of the common-mode gain, By using the Spice simulator and the models of a 1.2-mu m CMOS process, we have found that the calculated frequency response of CMRR well fits the simulated curves for input frequencies as high as 100 MHz.

引用

页码：137 / 143

页数：7

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