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CN103155417B 电容测量电路、传感器系统及使用正弦电压信号测量电容的方法 失效 - 权利终止

电容测量电路、传感器系统及使用正弦电压信号测量电容的方法
摘要：
一种电容测量电路包括：测量电压源，被配置为向待测电容的第一端馈送正弦电压信号，以使存储在待测电容上的电荷发生时间变化。所述电容测量电路还包括Δ-∑调制器。所述Δ-∑调制器被配置为从待测电容的第二端接收电荷并提供数字输出信号，所述数字输出信号取决于从待测电容接收的电荷量。在传感器系统中可采用所述电容测量电路。
摘要（英）：

A capacity measuring circuit includes a measuring voltage source configured to feed a sinusoidal voltage signal to a first terminal of a capacity to be measured so as to cause a temporal change in a charge stored on the capacity to be measured. The capacity measuring circuit additionally includes a delta-sigma modulator. The delta-sigma modulator is configured to receive a charge from a second terminal of the capacity to be measured and to provide a digital output signal which is dependent on a quantity of the charge received from the capacity to be measured. The capacity measuring circuit may be employed in a sensor system.

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