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Design and Analysis of a NMOS Gate Cross-connected Current-mirror Type Bridge Rectifier for UHF RFID Applications  

Park, Kwang-Min (Department of Electrical and Electronic Engineering, Soonchunhyang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.45, no.6, 2008 , pp. 10-15 More about this Journal
Abstract
In this paper, a new NMOS gate cross-connected current-mirror type bridge rectifier for UHF RFID applications is presented. The DC converting characteristics of the proposed rectifier are analyzed with the high frequency equivalent circuit and the gate capacitance reduction technique for reducing the gate leakage current due to the increasing of operating frequency is also proposed theoretically by circuitry method. As the results, the proposed rectifier shows nearly same DC output voltages as the existing NMOS gate cross-connected rectifier, but it shows the gate leakage current reduced to less than 1/4 and the power consumption reduced more than 30% at the load resistor, and it shows more stable DC supply voltages for the valiance of load resistance. In addition, the proposed rectifier shows high enough and well-rectified DC voltages for the frequency range of 13.56MHz HF(for ISO 18000-3), 915MHz UHF(for ISO 18000-6), and 2.45 GHz microwave(for ISO 18000-4). Therefore, the proposed rectifier can be used as a general purpose one to drive RFID transponder chips on various RFID systems which use specified frequencies.
Keywords
UHF; RFID; rectifier; gate leakage current; gate capacitance reduction technique;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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