如图所示, IE为1mA，三极管β=99，rbb’=300Ω,求电路的输入电阻Ri的值。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/c2603e8b81af4583bf1a892ed94fb7ea.png
举一反三
- 如图所示, IE均为1mA，三极管β=99，rbb’=300Ω,求电路的输入电阻Ri的值。[img=413x522]17a3d939d23f464.png[/img]
- 如图所示的电路属于（ ）滤波电路。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/190dffe6b54f4c01ba9042f0697ba320.png
- 逻辑电路如图所示，当A=“1”时，RS触发器（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/0288874c5a0644caae0d4290f5df0772.png
- 同或的逻辑表达式为：（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/de7cc25b0fa441acbd1ae351e6b717bf.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/0521e4ead0c94f6b926ad268101e03dc.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/d7e24d5fe0914412afdc9203542a97be.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/1a45c582099646599b854ab6adc648f4.png" />
- 如图所示电路，端口的输入电阻为（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/d98ab65818b047beb7603a190135ae10.png