Circuit and a method for improving energy collection of a passive radio frequency identification tag of a temperature sensor

Abstract

The invention relates to the technical field of semiconductor integrated circuit design, in particular to a circuit for improving energy collection for a passive radio frequency identification tag chip integrated with a temperature sensor and a communication instruction method for improving energy collection. According to the invention, the instruction for starting the temperature sensor by the card reader is divided into the coded modulation instruction part and the uncoded modulation radio frequency field part for prolonging the charging time; a switch energy storage capacitor is added in the circuit system architecture; the working mode of the sensor is used for starting a logic signal to control whether the switch energy storage capacitor is connected or not; therefore, the passive radio frequency identification tag integrated with the high-precision temperature sensor can consider the limitation of a time window protocol of a common downlink instruction response mode; and the high-energy level requirement of the high-precision sensor operation mode is met, so that a new feasible implementation technology is opened for the integration of the passive radio frequency identification tag chip and the sensor chip.

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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