SDI数字信号切换器的设计与制作  

The Design and Making of SDI Switch

作　　者：史宙亮[1] 李功杰[1] 

机构地区：[1]扬州大学新闻与传媒学院,扬州225009

出　　处：《现代科学仪器》2008年第6期15-17,共3页Modern Scientific Instruments

摘　　要：分析串行数字信号SDI的特点,认为现有的模拟开关不适宜用于SDI信号的切换。介绍运用晶体管、电阻电容分离元件组成一种新颖的电子开关,制作SDI切换器。这种切换器电路简单,切换可靠,信号质量高。同时设计了同步切换电路,保证切换开关在场消隐期间进行,因此该切换器可用于不需特技切换的场合,可代替SDI切换台,具有很好的实用价值。This paper analyzes the features of SDI and proposes the idea that existing simulated switch are inappropriate for the switchover of SDI.The paper also introduces a novel electronic switch composed of transistors,resistance-capacitance resolution elements and proposes the procedures for the making of SDI switch, which is of simple circuit,reliability,and high-quality signal.The synchronized switching circuit is designed to ensure operation during blanking period.The new switch is of practical value.It is applicable to the occasion that does not require special switchover,therefore it can replace SDI switchover station.

关 键 词：开关隔离度 同步时钟 截止频率 SDI切换器 

分 类 号：TN948.4[电子电信—信号与信息处理]