已知电路如图 4 所示，运算放大器构成http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/0547d1e3e7b44b5d8201447c92ed6e29.png
举一反三
- 电路如图5所示，运算放大器构成 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/ad0dc8cc2e8547ccb31a035a818c1d8d.png
- 电路如图 4 所示，电流 I 为 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/48dcfd6292e44a329c2d5b04973679d8.png
- 放大电路如图9所示， RF的反馈类型是（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/a7749521401a464cb60fcd5a83682f6a.png
- 已知电路如图4所示，若输入信号ui为正弦波，则输出波形为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5b65bf8bacef4037b33fdb27bb9a1fe9.png
- 图7所示电路，若已知电流I=1A ，则 Uab= ( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/51368429af7741c8a3acecb0e789389d.png