基于多斜率调制器的集成电容式传感器接口

2013 IEEE International Conference on Industrial Technology (ICIT) Pub Date : 2013-04-23 DOI:10.1109/ICIT.2013.6505802

S. Nihtianov, Yao Cheng

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引用次数: 0

摘要

提出了一种基于多斜率模数转换器(ADC)的高能效电容式传感器接口。该接口采用精密电阻和时间作为参考。通过采用多斜率模数转换器，将该多斜率调制器的转换时间降低到50us。计数器作为正弦滤波器工作，以减少噪声，这有助于在250 Hz信号带宽下实现14.5位的分辨率。

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Integrated capacitive-sensor interface based on a multi-slope modulator

This paper presents an energy-efficient capacitive sensor interface based on a multi-slope analog-to-digital converter (ADC). The interface utilizes precision resistor and time as references. By using a multi-slope analog-to-digital converter, the conversion time of this multi-slope modulator is reduced down to 50us. The counter works as a sinc filter to reduce the noise, which helps to achieve a resolution of 14.5 bits for 250 Hz signal bandwidth.

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2013 IEEE International Conference on Industrial Technology (ICIT)

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