Based on an analysis of UHF (ultra-high-frequency) characteristic of PD (partial discharge) in power transformer, using mixing technique, a signal disposal cell has been devised for the sake of facilitating common data sampling card.

• 摘要在分析了电力变压器局部放电的超高频特性的基础上，利用混频技术，设计了局部放电超高频信号的信号调理单元，方便普通数字采集卡采集。