Csmc Technologies Fab2 Co., Ltd.

Csmc Technologies Fab1 Co., Ltd.

Weiyan Zhang

Xueyan Wang

Qiang Chen

A signal amplification circuit comprises a low pass filter circuit (). The low pass filter circuit () comprises two input ends and two output ends and further comprises two capacitors (C, C) having opposite polarities respectively connected between two output ends. A buffer circuit () comprises two input ends, a first operational amplifier (A) and a second operational amplifier (A), two output ends and a plurality of switches. A switched capacitor integrated circuit () comprises two input ends, a third operational amplifier (A), a plurality of capacitor modules, a plurality of chopper modulators and two output ends. A signal switch (S) is used to control the on and off states of voltage signal before amplification.

Signal amplification circuit

A sensor control circuit comprises a sensor (), a filtering circuit (), a buffering circuit (), and an amplifying circuit (). An output end of the sensor () is connected to an input end of the filtering circuit (), an output end of the filtering circuit () is connected to an input end of the buffering circuit (), and an output end of the buffering circuit () is connected to an input end of the amplifying circuit (). Because the buffering circuit () is disposed between the filtering circuit () and the amplifying circuit (), the sensor circuit has an advantage of full sampling. Further provided is an electronic apparatus using the sensor control circuit.

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Jiangsu, China

Weiyan Zhang