摘要
本文讨论了移动电话接收机功能电路中常见的几种天线电路、低噪声放大电路及混频电路,重点放在它们的性能指标、特性及应用方面。分析低噪声放大电路的稳定性及混频电路的干扰噪声问题之后,本文提出了一些提高稳定性和抗干扰的解决方案。
关键词:天线电路;低噪声放大电路;混频电路;抗干扰
Abstract
This paper discusses some kinds of function circuits to receiver for moblie telephone,incuding antenna circuit、low noise amplifier circuit and mixing circuit,the emaphsis are put on their performance indexes、characteristics and applications.After analyzing the problem of stability of the low noise amplifier circuit and interference noise of mixing circuit,this paper proposes some solutions to improving stability and anti-jamming.
Key Words:antenna circuit;LNA circuit ;mixing circuit;anti-jamming