1 V rail-to-rail constant-gm CMOS op amp

被引：8
|
作者：
Lu, C. -W. [1 ]
Hsiao, C. -M. [1 ]
机构：
[1] Natl Chi Nan Univ, Dept Elect Engn, Puli, Nantou Hsien, Taiwan
来源：
ELECTRONICS LETTERS | 2009年 / 45卷 / 11期
关键词：
OPERATIONAL-AMPLIFIER;
D O I：
10.1049/el.2009.0763
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：
A 1 V rail-to-rail constant-g(m) CMOS operational amplifier is proposed. This study shows that keeping the sum of currents in the complementary differential pairs constant rather than controlling the tail currents produces a constant-g(m) input stage operating in the weak inversion. The currents in the n-channel differential pair are regulated to keep the sum of currents in the complementary differential pairs constant using a negative feedback loop. This study also provides experimental results obtained from a 0.35 mu m CMOS prototype chip.
引用
收藏
页码：529 / U64
页数：2
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