范世贵 电路基础2版 答案(第12章)

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1、窗体顶端                  第十二章 含运算放大器的电路窗体底端12-1     求图题12-1所示电路的输出电压。　                 图 题12-1答案    解：（“虚断”）                                 （“虚短”）                                                            ；  12-2     求图题12-2所示电路的开路电压比。　                         图 题12-2答案       解：

2、　                                                12-3      图示题12-3所示电路可用来使一个小电容变成一个大电容，求此大电容的值，已知。　                     图 题12-3答案      解：                                                       　　                            12-4   求图题12-4所示电路的输入阻抗。                                

3、        图 题12-4　答案     解：（a）                                      　           又 即：                            　                                                               ，　 （b）同理可得：　                            。12-5      图题12-5所示微分电路与输入电压的波形，画出的波形。                   　答案    

4、     解：                                                             波形如图（c）所示。12-6   图题12-6所示积分电路与输入电压的波形，画出的波形。  　答案       解：                             　                 波形如图（c）所示。       12-7      图题12-7所示电路，，，。求输入电阻。　                 图题12-7答案       解：                       

5、                                          　                                     　                        或                          　12-8  证明图题12-8所示（a）与（b）两个电路等效。                                                     图 题12-8　答案      证明：（a）            （b）                         

6、                                     （a）（b）两个电路等效。12-9   求图题12-9所示网络的H参数矩阵。　　             图题12-9答案         解：           　　                         　　　                                                                             即12-10  求图题12-10所示二端口网络的Z矩阵。　　              图题12-10

7、答案         解：                                                                                              12-11   证明图题12-11中各对电路是等效的。                                   图 题12-11　答案              （a）证明　                                                         两电路对应等效。　            

8、   （b）