QAM解调芯片中镜像抑制滤波器的VLSI实现  

Implementation of VLSI Architecture for Image-Reject Filter in QAM Demodulation Chip

作　　者：姜爱鹏[1] 邓青[1] 吴建辉[1] 叶双应[1] 

机构地区：[1]东南大学国家专用集成电路系统技术研究中心,南京210096

出　　处：《电子器件》2006年第2期439-442,共4页Chinese Journal of Electron Devices

摘　　要：提出一种用于接收数字电视信号的QAM解调芯片中,初始解调电路的镜像抑制滤波器的VLSI实现方法。阐述了镜像抑制滤波器VLSI实现过程中所需要注意的问题。根据I,Q信号的特点,通过时分复用把两个低通镜像抑制滤波器合并为一个半带滤波器,来实现低通镜象抑制滤波器。A VLSI implementation of an image-reject filter for initial demodulator circuit used in QAM receiver chip for digital TV presented. The problems in VLSI implementation were discussed. Based on the characteristics of the I,Q signals, a half-band filter was used to take the place of two low pass filters by time-sharing and realize the restraint image fumction of low pass filter.

关 键 词：OAM解调 初始解调器 半带滤波器 

分 类 号：TN713.7[电子电信—电路与系统]