首页>
外国专利>
LOW TO HIGHER IF CONVERSION FOR ACTIVE FILTERED LIMITED IF SYSTEMS
LOW TO HIGHER IF CONVERSION FOR ACTIVE FILTERED LIMITED IF SYSTEMS
展开▼
机译:有源滤波中频系统的低到高中频转换
展开▼
页面导航
摘要
著录项
相似文献
摘要
An improved receiver architecture utilizing active filters for frequency conversion, wherein the final IF stage operates at a frequency higher than the previous IF stage, is disclosed to facilitate the processing by a baseband system operating at higher IF of signals from receivers operating at lower IFs and to enable the continued use of existing post-IF devices with multiple-conversion receivers. A low IF signal output is digitally mixed with a divided local oscillator signal to achieve a higher IF which is suited for processing by post-IF components such as a detector. The mixed signal is then filtered by a low dynamic range active filter and limited.
展开▼