Harmonic distortion on class AB CMOS current output stages

被引：30

作者：

Palmisano, G ^{[1
]}

Palumbo, G ^{[1
]}

Pennisi, S ^{[1
]}

机构：

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

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 1998年 / 45卷 / 02期

关键词：

D O I：

10.1109/82.661662

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：

Linearity performance in class AB CMOS current output stages is discussed, and simplified equations are derived for the harmonic distortion. It was found that channel-length modulation and transistor mismatches are the main sources of distortion in current output stages. A novel high-performance class AB current output stage is also presented which is based on active-gain enhanced cascoded mirrors, It overcomes the nonlinearity caused by channel-length modulation and provides a very high output resistance. The linearity performance of the proposed circuit is only limited by the fundamental constraints due to transistor mismatches.

引用

页码：243 / 250

页数：8

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