Rectifying unit based on fixed threshold elimination and differential voltage doubling, rectifier and RFID tag

Abstract

The invention discloses a rectifying unit based on fixed threshold elimination and differential voltage doubling, a rectifier and an RFID tag. The rectifying unit comprises a DC input end Vin, a DC output end Vout, a first differential radio frequency signal input end RFN and a first differential radio frequency signal input end RFP. A first main NMOS tube M0 and a second main PMOS tube M1; a first threshold compensation bias module and a second threshold compensation bias module; voltage doubling rectifying module. According to the invention, a mode of combining a fixed threshold eliminationtechnology and a fully differential dynamic threshold elimination technology is adopted; a current path is formed by the auxiliary rectification unit and bias circuits of the M0 and the M1, bias voltage is provided for the M0 and the M1, dead zone voltage is reduced, radio frequency energy conversion efficiency of the main rectification unit is greatly improved, and Iout is increased accordingly to improve load capacity. Meanwhile, RFP and RFN differential signals are matched, so the conversion efficiency during low radio frequency energy input is improved, and the sensitivity is greatly improved.

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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