【摘要】 为了检测农作物中有机磷农药的残余量,采用恒电位仪和信号放大器设计了一个微电流检测电路,可以有效地将微电流信号放大输出为模数转换器能够识别的电压信号。该电路检测电流精度达到0.25%,灵敏度达到10-8A/V.更多还原

【Abstract】 In order to measure the residue of organophosphate pesticide on the crop,this paper designed the circuit detecting of weak current with potentiostat and signal amplifier.It could magnify weak current signal to voltage signal which could identified by the analog-digital converter.The current precision is 0.25%,the sensitivity is 10-8 A/V.更多还原