A Rectification Unit, Rectifier and RFID Tag Based on Fixed Threshold Elimination and Differential Voltage Doubling

Abstract

The invention discloses a rectification unit, a rectifier and an RFID tag based on fixed threshold elimination and differential voltage multiplication, comprising: a DC input terminal Vin, a DC output terminal Vout, a first differential radio frequency signal input terminal RFN, a first differential radio frequency signal input terminal RFP; the first main NMOS transistor M0 and the second main PMOS transistor M1; the first threshold compensation bias module and the second threshold compensation bias module; and the voltage doubler rectification module. The present invention proposes the combination of fixed threshold elimination technology and full differential dynamic threshold elimination technology, by forming a current path from the rectifier unit and the bias circuits of M0 and M1, providing bias voltage for M0 and M1, and reducing the dead zone voltage , which greatly improves the RF energy conversion efficiency of the main rectifier unit, and Iout increases accordingly to improve the load capacity; at the same time, it cooperates with RFP and RFN differential signals to improve the conversion efficiency at low RF energy input and greatly improve the sensitivity.

Description

technical field [0001] The invention relates to the field of radio frequency identification, in particular to a rectification unit, a rectifier and an RFID tag based on fixed threshold elimination and differential voltage doubling. Background technique [0002] Under the wave of the new generation of information technology revolution in the 21st century, wireless energy transmission and acquisition are widely used in the field of non-contact communication, such as the Internet of Vehicles, Internet of Things and other fields, using external antenna electromagnetic induction to generate AC signals, and then converting the AC signals by rectifiers for direct current energy. [0003] With the development of passive RFID (radio frequency identification) technology, the communication distance continues to increase, and it becomes more and more difficult to improve the energy conversion efficiency and sensitivity in the process of wireless energy transmission. In many application...

AI Technical Summary

Problems solved by technology

The fully differential dynamic threshold elimination rectifier has a very fast turn-on and cut-off speed, and the differential signal also eliminates part of the threshold, but the fully differential dynamic threshold elimination rectifier uses two charging paths, which consume twice the power consumption, and the two charging paths alternately charge at the same time There is a transition zone in the process, which increases the reverse leakage and offsets the advantages of full differential dynamic threshold cancellation

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