Finally , the anti - jamming system is discussed . through simulation analysis and experiment on signal integrity , the method of improving stability of the circuit is presented . circuit testing proves that the “ sub - row ” gray - scale modulating method is suitable for our printable fed with low work . the designed circuit has been applied to our fed sample which can display vga format video with 256 gray - scale and brightness of 400 cd / m2 实际电路测试证明,子行灰度调制的方法适用于印刷型低逸出功fed显示屏,所设计的灰度调制驱动电路已成功应用于25英寸彩色fed样机中,可显示vga格式视频图像,灰度等级为256级,显示亮度达400cd / m2 。
Firstly , the thesis studies the characteristic and the key of the design of the control system of short circuit test bench . secondly , we discuss the different ways to control the initial fault current angle , and give some different design projects based on pc 然后对合闸角控制的不同方法进行了研究,并根据合闸角控制的方法不同提出了基于pc机的不同设计方案,并对各种方案进行了详细说明,特别是windows和dos环境下精确短定时的实现以及在电力系统短路试验控制系统中的应用。
At present testing method based on current testing has become an important cmos digital integrated circuit testing method which has been accepted widely . in order to improve the fault coverage of the testing to meet the demands of people , the dynamic current ( iddt ) testing was proposed to detect some faults that cannot be detected by other testing methods in the middle 1990 ’ s 90年代中期,人们提出了瞬态电流测试方法( iddt ) ,以便发现一些其他测试方法所不能发现的故障,进一步从总体上提高测试的故障覆盖率,满足人们对高性能集成电路的需要。
Gb1094 . 5 - 85 power transformers part 5 ability to withstand short circuit only applies to power transformers , not to balanced transformers . if short - circuit test on balanced transformers can be performed by means of single phase supply instead of three phase supply , and other special transformers can also be done in this way , so it is very significant to improve test capacity of transformer laboratory in our country 变压器的短路强度只能通过短路试验来验证,国家标准gb1094 . 5 - 1985 《电力变压器第5部分承受短路的能力》只适用于电力变压器,对平衡变压器等特殊变压器并无具体规定,对于平衡变压器,如果可以用单相电源预先短路法模拟三相电源的短路试验,那么其它特种变压器的短路试验也可以参照进行,这对提高我国变压器试验室的试验能力具有重要意义。
In this paper , the oscillatory circuit and synthetic circuit are analyzed theoretically at first and the main parameters of sythetic circuit under the conditions of the different current grades are gotten , that is not only the parameters " basis of synthetic circuit test , but also the important references of studying computer - testing system for current measurement of current - source in synthetic circuit 本文首先对振荡回路和合成回路进行了理论分析并确定了在不同电流等级条件下合成回路中的各主要参数,这不仅为合成回路试验提供了参数依据,同时也为合成回路中电流源电流信号计算机测试系统的研制提供了重要参考。