安庆师范学院学报：自然科学版2012，Vol.18Issue(2)：54-57,61,5.
一种915MHz零中频接收电路设计
A Design of New 915MHz Zero - IF Receiving Circuit
摘要
Abstract
Compared to superheterodyne receiving circuits, the Zero - IF receiving circuits is featured by simple structure, in- tegration accessibility to miniaturization and no image frequency interference, which saves the image frequency suppression filter with both high cost and low integration accessibility. The signal channel in Zero - IF receiving circuit can be set in low frequency and only a low - pass filter is thus needed. However, the native defects in Zero - IF receiving circuits, such as DC drift, LO leak- age and LF noise, lead to constant failures in achieving the Zero - IF. Therefore, by analysing these defects, two principal im- provements are made in the design of a certain 915MHz mobile communication terminal receiving circuits, based on which the sim- ulation design is completed and its feasibility and rationality have been theoretically verified through simulation seftwares ADIsimRF and ADS.关键词
零中频/直流漂移/本振泄漏/低频噪声/接收电路Key words
zero- IF/DC drift/LO leakage/LF noise/receiving circuit分类
信息技术与安全科学引用本文复制引用
王鹏,刘坤,李民权..一种915MHz零中频接收电路设计[J].安庆师范学院学报：自然科学版,2012,18(2):54-57,61,5.基金项目
安庆师范学院青年科研基金（KJ201101）资助. （）
