Circuits for passive radio identification tags operating in the UHF band and methods for operating the circuits

摘要

The present invention is configured to perform radio communication with a reader that transmits a periodic read signal, where one cycle of the read signal is a passive radio identification tag operating in the UHF band, including an energy recovery step and a communication step. Regarding the circuit for. The circuit comprises a control device configured to store energy from radio waves during the energy recovery phase and to communicate with a reader during the communication phase, and an interface connected to an external analog sensor. The interface connects an external analog sensor, supplies electricity to the external analog sensor, and amplifies the signal of the analog measurement value from the electrical connection part configured to acquire the analog measurement value from the sensor. It features an amplifier configured to do so and an analog-to-digital converter (ADC) configured to digitize the amplified analog measurements from the sensor, and during the energy recovery stage, the interface is an external analog sensor. Includes acquisition cycles for supplying to, as well as acquiring, amplifying, and digitizing measurements from sensors. Furthermore, the present invention relates to systems and methods. [Selection diagram] Fig. 1