基于LM3914的电平切割细分电路

常规电平切割细分电路的细分数越高 ,细分电路所需的比较器也越多 ,会造成电路结构烦杂 ,装调困难 ,这是限制细分数的实际原因。以点 /线显示驱动器LM 3914替代常规电平切割细分电路中的比较器阵列 ,可以减少比较器芯片的使用数量 ,提高电路的集成度 ,增强系统的可靠性。对LM 3914采用级联 。

微分相位校正电路的工作原理分析

微分相位失真是由传输系统的非线性引起的,它会造成彩色图像信号随亮度信号变化而引起色调失真,电视信号在传输的过程中总存在着非线性,它不仅会产生微分增益失真,同时还会产生微分相位失真、互调失真等,着重介绍的是微分相位失真。

Ultimatte 11高清色键器工作原理及使用心得

我台演播室的虚拟系统采用最新的Ultimatte 11高清色键器,色键器在虚拟演播室起着重要的作用。本文简单介绍Ultimatte 11高清色键器的工作原理和主要功能的使用,做到在较短的时间内就能完成好的抠像效果。

Vibration Control on Roadheader with Horizontal Cutting Head of Electric-Control-Box

Analysis and measurements of the vibration on AM50 horizontal axis roadheader of electric-control-box was carried out, and the vibration characteristics were obtained. Based on the results, a new type of wire rope isolator was designed, whose characteristics were examined by experiments. The tests show that the wire rope isolator achieves satisfied results and can meet the requirements for the vibration control of the roadheader of electric-control-box.