A circuit and method for improving energy harvesting of temperature sensor passive radio frequency identification tags

Abstract

The invention relates to the technical field of semiconductor integrated circuit design, in particular to a circuit for improving energy collection of a passive radio frequency identification tag chip integrated with a temperature sensor, and a communication instruction method for improving energy collection. The present invention divides the instruction of the card reader to start the temperature sensor into the coded and modulated instruction part and the non-coded and modulated radio frequency field part that prolongs the charging time, and adds a switch energy storage capacitor in the circuit system architecture, which is determined by the working mode of the sensor To start the logic signal to control whether the switch energy storage capacitor is connected or not, so that the passive passive RFID tag integrated with a high-precision temperature sensor can take into account the limitations of the time window protocol of the ordinary downlink command response mode and the high-precision sensor operation mode This opens up a new feasible implementation technology for the integration of passive passive RFID tag chips and sensor chips.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuit design, in particular to a circuit for improving energy collection of a passive radio frequency identification tag chip integrated with a temperature sensor, and a communication instruction method for improving energy collection. Background technique [0002] In today's Internet of Things application field where everything is connected, wireless sensor tags combine information perception and measurement functions with radio frequency communication functions to facilitate the implementation of sensor nodes in wireless sensor networks. For example, in the application scenario of a warehouse or vegetable planting greenhouse, the supporting column or the steel frame structure of the building is equipped with a sensor device to monitor the ambient temperature and humidity and even the air pollution level. After completing the tasks of measurement and storage, wirelessly Local a...

AI Technical Summary

Problems solved by technology

[0012] The technology of the present invention solves the design dilemma of the passive radio frequency identification sensor tag chip, that is, it must meet the requirements of accurate sensing measurement and A / D conversion mode (ie, RTF mode) at high energy levels, and at low energy levels but The application requirements of the active repeated response mode (ie TTF mode) limited by the limited time window

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