一种自偏置高效率CMOS超高频整流电路的设计

Design of a Self-biased High Efficiency CMOS UHF Recifier Circuit

基于SMIC 0.18μm 1P6M标准CMOS工艺,设计并实现了一种低成本、高效率的超高频整流电路.该设计采用直流偏置电路和驱动电路对整流管的阈值电压进行补偿,消除了标准CMOS工艺阈值电压对整流电路效率的不利影响.在版图后仿真下,当输入915MHz,340mV的射频信号时,整流电路的输出电压为2.646V,启动时间为60μs,总体效率高达43.8%,整个电路版图面积为910μm×600μm.

A kind of ultra high frequency rectifier circuit with low cost, high efficiency is designed and realized based on the SM1C 0.18μm 1P6M standard CMOS process in this paper, This design uses the dc bias circuit and drive circuit to compensate the threshold voltage of the rectifier, and eliminates the adverse effects of the standard CMOS technology threshold voltage on the rectifier circuit efficiency. With the post-layout simulation, when the input 915 MHz, 340 mV radio frequency signal, the rectifier circuit output voltage is 2. 646 V, the start time is 60μs, the overall efficiency is as high as 43.8%, the whole circuit layout area is 910μm× 600μm.