丅B在电工电子实训123B收音机报告图代表什么

1、用叠加原理分析电路若某个電源单独作用时,应将其余的恒压源____________处理将恒流源作_______________处理。

并联后的总电阻为4Ω,且R

7、已知电压0)v,此电压相量的三角形表达式是__________;

9、PN結是由的扩散运动和的漂移运动共同生成的其特性是。

10、在纯净半导体中掺入+5价元素则形成_____________型杂质半导体掺入_______________价元素形成P型杂质半导體。

12、 NPN型的三极管工作在饱和状态时其发射结_____偏;集电结_____偏。

13、放大电路有、和三种组态

14、放大电路必须要有合适、稳定的,才能不夨真地放大交流信号

16、将下列各数按从大到小的顺序排列:(246)

《GB-T2423.2电工电子实训123B收音机报告电子產品环境试验 第二部分:试验方法 试验B:高温》.pdf

2001一11一02发布 2002一06一01实施 中 华 人 民 共 和 国 发 布 国家质量监督检验检疫总局 GB/T1 目 次 前言 ·······································································································。。。······…… ········,·············。·····。··························,····················································…… N 试验B:高温试验的历史概况 ···············································……。···························……N 试验A:低温与试验B:高温下标字母之间的关系 ···································。···················……V 引言·················································································································…… 1 第一篇 试验Ba:非散熱试验样品温度突变的高温试验 1 目的 · 2 一般说明 ····································································································…… 3 试验设备的说明 ·························。···································································…… 4 严酷等级 ·……..;·······.,···········································。···············.,················…… 5 预处理 ·····················································································”············… .… 6 初始检测 ·······································································································…… 7 条件试验 ·································

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