基于数字电视调谐器镜像抑制与架构分析

Image Rejection & Structural Analysis of Tuner Base on DTV

伴随现代通信及数字压缩技术的突飞猛进，全球的电视广播系统正逐步从模拟替换成数字信号。射频调谐器电路在数字电视接收机、机顶盒以及移动接收系统中都占据着举足轻重的地位。本文针对数字电视调谐器中存在的镜像干扰问题分析几种调谐器架构，比较各自优缺点，并从中选择适合移动接收的调谐器方案。

Accompanying with quick development of modem communication ＆ digital compress, the global analog television broadcast system is gradually instead of digital system. Tuner occupies an important position in all of digital TV set , Top-Box receiver and mobile receiver system. In this paper, various structures to improve image rejetion of tuner are analyzed. Their characters are compared each other. Furthermore, the structure of tuner for adapt to mobile receiver is recommended.