Embedded current amplifier compensation for three-stage amplifiers with large capacitive loads

IEICE Electronics Express

Weizhong Chen¹  Ping Luo²  Luncai Liu³  Pengfei Liao³ 

[1] School of Electronic Engineering, Chongqing University of Posts and Telecommunications;State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China;Analog IC Design Department, Acoustoelectric and Optoelectronic Corp., China Electronics Technology Group Corporation

关键词: current amplifier;    capacitive load;    compensation capacitor;   

DOI  :  10.1587/elex.12.20150872

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(12)An embedded current amplifier compensation (ECAC) for three-stage amplifiers with large capacitive loads is presented in this paper. Two current amplifiers are embedded into the first stage. The compensation capacitor is connected to the input of the current amplifier rather than the output of the first stage, which enables the non-dominant complex poles of the ECAC amplifier to be located at high frequencies for bandwidth extension; in addition, the compensation capacitor required is greatly reduced. The amplifier has been fabricated in a 0.13 µm CMOS process. When driving a 2000 pF capacitive load, the ECAC amplifier achieves 1.85 MHz gain-bandwidth product by dissipating 33.6 µW power at 1.2 V supply and using total compensation capacitance of only 0.8 pF.

【 授权许可】

Unknown