High-drive and linear CMOS class-AB pseudo-differential amplifier

被引：11
|
作者：
Giustolisi, Gianluca [1 ]
Grasso, Alfio Dario [1 ]
Pennisi, Salvatore [1 ]
机构：
[1] Catania Univ, DIEES, I-95125 Catania, Italy
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2007年 / 54卷 / 02期
关键词：
class AB; CMOS; differential pair; transconductor;
D O I：
10.1109/TCSII.2006.886239
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 CMOS pseudo-differential-input differential-output amplifier operating in class AB and exhibiting high-current-drive capability is presented. The circuit operates from a Minimum Supply of V-T + 2V(DS,SAT), provides fast settling response, and also characterized by a wide input differential range with high linearity that enables its use even as a transconductor for filtering applications. For this purpose, a common-mode feedback section is also included. A circuit prototype was fabricated using a 0.35-mu m technology and powered with 2 V. Using a quiescent current of 20 MA, experimental measurements show a differential current-drive capability of 1 mA (which is 50 times greater than the quiescent value), with this value being solely limited by the input voltage swing allowed. Third-order harmonic distortion is lower than -64 dB for a 1-Vpp 100-kHz input.
引用
收藏
页码：112 / 116
页数：5
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