对桥梁传感器高精度读取集成电路的研究
Xiangyu Li1, Pengjun Wang1, Hao Ye1
1College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou 325035, China.
Micromachines
|November 25, 2023
概括
本研究介绍了一种用于传感器应用的高精度,低功耗的西格玛-三角形模拟到数字转换器 (ADC). 设计的电路实现了118dB的动态范围和110.5dB的信号噪声比,满足了苛刻的要求.
科学领域:
- 电气工程 电气工程
- 传感器技术 传感器技术
- 集成电路设计 集成电路设计
背景情况:
- 桥梁传感器和数字传感器在军事和民用应用中至关重要.
- 高精度,低功耗的模拟数字转换器 (ADC) 对于传感器读出电路至关重要.
- 西格玛-三角形ADC提供高信号噪声比 (SNR),线性和CMOS兼容性.
研究的目的:
- 设计和实施一台四级前送西格玛-三角形调制器,配备数字消灭过器.
- 为了提高系统稳定性和抑制噪声,使用相关双采样 (CDS) 和主动预补偿器.
- 为了实现传感器应用的高精度和低功耗.
主要方法:
- 设计了一种第四阶送西格玛-三角形调制器和一个数字消灭过器.
- 采用相关双采样 (CDS) 来降低集成前噪声.
- 采用活跃的预补偿器来保持稳定性,以及可调节的反因子来补偿过程错误.
主要成果:
- 使用0.35微米CMOS工艺制造了一个芯片,面积为9毫米2.
- 在5V供应和6.144MHz采样频率下,实现了调节器功耗13mW.
- 显示了118dB的动态范围,110.5dB的SNR (24kHz带宽),18.05有效位和-113dB的波扭曲.
结论:
- 设计的sigma-delta ADC满足了高精度传感器应用的严格要求.
- 实施的电路提供了性能,功耗和面积的竞争平衡.
- 使用的技术,包括CDS和主动预补偿,对于提高西格玛-三角形调节器性能是有效的.
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