一種共差模信號分離器設計

何夢之

摘 要：本文設計了一款基于射頻變壓器的共差模信號分離器，針對射頻變壓器在高頻區域隔離度不夠的缺點，引入差模濾波電容以及共模扼流圈從而提高了在高頻區域的性能。首先通過電路仿真分析了該裝置的可行性，之后組裝裝置進行了實物測試，證明了該分離器對共差模信號分離的有效性。

關鍵詞：電磁兼容 共模信號 差模信號 信號分離器

A Design of Common Differential Mode Signal Splitter

He Mengzhi

Abstract：This paper designs a common differential mode signal separator based on RF transformers. Aiming at the shortcomings of insufficient isolation of RF transformers in the high frequency area， differential mode filter capacitors and common mode chokes are introduced to improve the performance of high frequency area. First， the feasibility of the device was analyzed through circuit simulation， and then the device was assembled for physical testing， which proved the effectiveness of the splitter for common differential mode signal separation.

Key words：electromagnetic compatibility， common mode signal， differential mode signal， signal separator