A capacitor-free CMOS low-noise, low-dropout regulator for capacitive micro-machined accelerometer application

被引：0
|
作者：
Lv Bingjun [1 ]
Wang Pengfei [1 ]
Liu Xiaowei [1 ]
Yin Liang [1 ]
Xu Na [1 ]
机构：
[1] Harbin Inst Technol, MEMS Ctr, Harbin 150001, Peoples R China
来源：
MEMS/NEMS NANO TECHNOLOGY | 2011年 / 483卷
关键词：
Micro-accelerometer; low-dropout regulator; chopper stabilization; pole-zero tracking frequency compensation;
D O I：
10.4028/www.scientific.net/KEM.483.97
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A capacitor-free CMOS low-noise, low-dropout (LDO) regulator for Micro-accelerometer is presented. Noise performance of the regulator is studied from a theoretical point of view and a chopper stabilized error amplifier is designed to minimize output noise. By adopting pole-zero frequency compensation technique, the proposed LDO regulator, which is independent of an off-chip capacitor, provides high closed-loop stability when the load current is switched by micro-accelerometer. The proposed LDO is designed and fabricated on a 2 mu m CMOS process. From the simulation results, it shows that the line regulation is 3.5mVN and the load regulation is 0.33mV/mA when the load current changes from 0 to 30 mA. The experimental results show that the output noise of the regulator is less than 180nV/sqrt(Hz) at low frequency
引用
收藏
页码：97 / 102
页数：6
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