摘要
本文介绍了点阵式彩色视频大屏的设计思想；对不用Ｄ／Ａ转换器实现Ｄ／Ａ转换进行了详细的讨论；给出了具体线路，这种线路在国内还是首次发表；实际使用效果表明，研制是成功的。
The design principle of video dot array is described in this paper. The method of D/Aconversion without a D/A converter is discussed in detail.The particular circuit is designed and presented.such a circuit is first pubished in China. Results obtained from actual application indicate that the design isof gcod practical value.
