Implementation of VLSI Architecture for Image-Reject Filter in QAM Demodulation Chip
Jiang Ai-peng, Asic System · Dianzi qijian · 2006
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.