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
收藏
页码：243 / 250
页数：8
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