非接触式IC卡电源产生电路原理与设计

A Power Generation Circuit for Contactless IC Cards

文中所述电源产生电路是针对非接触式 IC卡而设计 ,是卡内 RF接口电路的关键技术。它在卡的正常工作距离 ( <1 0 cm)内 ,对从读卡器耦合的电磁波信号进行整流、滤波、稳压 ,从中获得持续稳定的直流工作电源电压 ,以维持卡内电路正常工作需要。并采用 1 .2μm工艺模型 ,用Hspice对电路进行模拟 ,可以得到 3.5V的直流工作电源电压 ,成功解决了非接触式卡内没有电源系统 ,需要由读卡器通过无线方式供电的问题。

A power generation circuit is designed for non contact IC cards.It obtains supply voltage by rectifying,filtering and regularizing magnetic waves transmitted by the card reader,to provide power needed for normal operation of the circuits in the IC card.A 1.2 μm process model is used for the circuit.HSPICE simulation shows that a 3.5 V dc operating voltage can be obtained.