NFC card detection circuit

The utility model provides an NFC card detection circuit comprising an NFC antenna, a diode, a first resistor, a second resistor, a third resistor, a capacitor and a voltage detection device. The positive electrode of the diode is connected with the NFC antenna, the negative electrode of the diode is connected with one end of the first resistor, the other end of the first resistor is connected with one end of the capacitor, one end of the second resistor and one end of the third resistor, and the other end of the capacitor and the other end of the second resistor are both grounded. And the other end of the third resistor is connected with the voltage detection device. The NFC card detection circuit has the advantages that only the most basic electronic components such as the resistor, the resistor-capacitor and the diode are adopted, the NFC card detection function is achieved through the simplest design, the circuit is simple, and detection is reliable. 本实用新型提供一种NFC检卡电路，包括：NFC天线、二极管、第一电阻、第二电阻、第三电阻、电容与电压检测装置；