The current RFID reader with high cost adopts integrated chip as base station,and it is not conductive to master its working principle for students.Additionally,in order to meet the new requirements of education reform and innovation of Internet of things,a 125 kHz low-frequency RFID reader system based on discrete components is designed and implemented which takes the object identification technology as the breakthrough point.The system consists of a carrier circuit,filter circuit,amplifier,comparator shap...