DUAL CONVERSION RECEIVER WITH PROGRAMMABLE INTERMEDIATE FREQUENCY AND CHANNEL SELECTION

摘要

A dual conversion receiver architecture that converts a radio frequency sign al to produce a programmable intermediate frequency whose channel bandwidth and frequency can be changed using variable low-pass filtering to accommodate multiple standards for television and other wireless standards. The dual conversion receiver uses a two stage frequency translation and continual DC offset removal. The dual conversion receiver can be completely implemented o n an integrated circuit with no external adjustments.