Current detection circuit of input circuit

The utility model discloses a current detection circuit of input circuit, it includes signal input part mouth, signal output part mouth, voltage sample port, front end control signal terminal mouth, rear end control signal terminal mouth, sampling resistor, sampling circuit, a MOSFET pipe, the 2nd MOSFET pipe, a bias circuit, the 2nd bias circuit, the utility model discloses a two sets of MOSFET pipe switches, and the front and back end of sampling resistor is put through in the timesharing, carries out voltage sample to front end and rear end respectively. Utilize the mode that detects sampling resistor both ends voltage difference and calculate the operating current, realize the current detection to the input branch road. The utility model relates to a current detection circuit of inputcircuit extensively is applicable to the electronic circuit technique field. 本实用新型公开了种输入回路的电流检测电路，其包括信号输入端口、信号输出端口、电压采样端口、前端控制信号端口、后端控制信号端口、采样电阻、采样电路、第MOSFET管、第二MOSFET管、第偏置电路、第二偏置电路，本实用新型通过两组MOSFET管进行切换，分时接通采样电阻的前后端，分别对前端及后端进