视频中的基本共射放大器 R B =300 kΩ , R C = 5kΩ,V CC = 12V, U BEQ =0.7 V , β =4 0, 1.画出直流等效电路,估算静态工作点 I BQ , I CQ 以及 U CEQ的值 ; 2.画出微变等效电路,计算 r be 的值; 3.若输出端接 R L = 4kΩ,试求 A u 、 R i 、 R o 的值。 (注意将答案保留整数)
【判断题】Although an Olympic medal loses its luster after years of storage, a hero never loses his credibility if he stops looking to the needs of others.()
【简答题】According to the text, which of the following people riding in the front dos not have to wear a seat belt? A) Someone who is backing into a parking space. B) Someone who is picking up the children fro...