A Low Power and Low Noise CMOS Chopper Amplifier for Use in Capacitive Type Accelerometer

被引：0

作者：

Yeh, Chih-Yuan ^{[1
]}

Huang, Jung-Tang ^{[1
]}

Wu, Po-Chang ^{[2
]}

Tsai, Hann-Huei ^{[2
]}

Juang, Ying-Zong ^{[2
]}

机构：

[1] Natl Taipei Univ Technol, Grad Inst Mech & Elect Engn, Taipei, Taiwan

[2] Natl Appl Res Labs, Chip Implementat Ctr, Hsinchu, Taiwan

来源：

2016 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS (APCCAS) | 2016年

关键词：

chopper amplifier; accelerometer; low power; low noise; sensor; INSTRUMENTATION AMPLIFIER; FEEDBACK; OFFSET;

D O I：

暂无

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：

This paper presents a low power, low-g and low noise accelerometer. By using chopper topology, an integrated low pass filter and zero and hold (ZOH) low pass filter, the low noise and low power are achieved. The integrated low-pass filter eliminates the chopping ripple voltage caused by the demodulation. The ZOH low pass filter provides a nulling function at chopping frequency to notch the residual voltage from the first modulator and amplifying gain to achieve greater sensor sensitivity. The circuit achieves a +/- 6 g dynamic range, and the simulated noise is 75 mu g/rtHz with a current consumption of 11 mu A.

引用

页码：642 / 645

页数：4

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