优化的零中频接收机方案在远距离射频识别中的应用

Optimized Non-Intermediate-Frequency Receiver's Application to Far Distance RFID System

本文介绍一种采用乘法器与加法器相结合电路替代一般零中频接收机中A/D转换电路的方法。该电路实现简单,灵敏度高,具有很高的信号实时处理能力,已被成功应用于某UHF无源非接触IC读卡器中,有效提高了读写距离。

This paper introduces a method using Multiplier and adder in order to replacing A/D circuit in non-intermediate-frequency receiver. The circuit has higher real time processing, high sensibility, and can be achieved simply. It is successful applied in a UHF non-energy IC reader, heightening read-write distance efficiently.