电流源常用于放大电路,其作用是:___ ______。
A. 提高放大倍数的稳定性
B. 提供静态偏置,提高放大倍数
C. 作为放大电路的输入信号
D. 用来放大信号
查看答案
差分放大电路产生零点漂移的主要原因是:_________。
A. 电压增益太大
B. 环境温度变化
C. 采用直接耦合方式
D. 采用阻容耦合方式
电流源电路的特点是: ______。
A. 一个双口网络
B. 端口电流恒定,交流等效电阻小
C. 端口电压恒定,交流等效电阻大
D. 端口电流恒定,交流等效电阻大
根据包含原则，哪一项最有可能是正确答案？
A. It made news all over the world.
B. It was built for the royal family.
C. It marked a new era in motor travel.
D. It attracted large numbers of motorists.
根据常识原则，哪一项可以最先排除？
A. He had only a third-grade education.
B. He once threated to kill his teacher.
C. He often helped his mother do housework.
D. He grew up in a poor single-parent family.
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