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《Sensor World》 2010-06
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Study on a micro capacitor testing method based on AD7150

ZHAO Jun-rong,LIU Shuang-feng (Key laboratory of Instrumentation Science &Dynamic Measurement,North University of China,Taiyuan,030051, China)  
A novel method for measuring micro capacitance output from capacitance-type sensor is described in this paper. The application background and domestic and foreign present situations of micro capacitance measurement circuits are elaborated.Combining the working principle of capacitance-type sensor,an adaptive circuit is established based on AD7150.AD7150 is a capacitance-digital converter with fast response time and ultra-low power consumption and communicates with microcontroller through the serial port.The AD7150 delivers a complete signal processing solution for capacitive proximity sensors.
【CateGory Index】: TP274
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