Patent ID: 11893434
Assignee: EXCELIO TECHNOLOGY (SHENZHEN) CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. The method according to claim 11, wherein the command from the card reader includes:
the command for regular operations of the RFID tag unrelated to the temperature sensor and configured to control the passive RFID tag to perform tasks other than temperature measurement;
the command for starting the temperature sensor by activating the temperature measurement and A/D conversion circuit, wherein a modulation method and a coding method of the command for starting the temperature sensor allow a radio frequency receiver circuit and the command demodulation circuit in the RFID tag to obtain the information in the command sent by the card reader for starting measuring a temperature, such that the RFID tag enters the temperature sensor mode; and
an extended time radio frequency signal without modulated information including a stabilized amplitude and a smooth envelope for a period of time, wherein after being processed by a rectifier circuit and a regulator circuit in the RFID tag, the extended time radio frequency signal fully charges the first energy storage capacitor and the second energy storage capacitor built into the RFID chip or externally connected to the RFID chip, such that more amount of energy is stored into the first energy storage capacitor and the second energy storage capacitor to satisfy the need for the temperature measurement and A/D conversion of the temperature sensor.