3、运算放大器[归.pdf

《3、运算放大器[归.pdf》由会员分享，可在线阅读，更多相关《3、运算放大器[归.pdf（14页珍藏版）》请在得力文库 - 分享文档赚钱的网站上搜索。

1、北师大珠海分校电子创新实验室2011 年暑期培训刘琨1.闭环增益计算放大电路的闭环增益时，采用拉氏变换：电容的阻抗：电感的阻抗：例题：计算如下图的闭环增益。2.放大器电路稳定性稳定性用放大器的频率响应，利用波特图分析。放大器的频率响应：放大器对不同频率的正弦信号的稳态响应，用放大器的放大倍数对频率的关系表示。对等式两边取对数20lg|A(j)|=20lg|1/F(j)因此，在波特图（幅频响应图）中，曲线20lg|A(j)|和 20lg|1/F(j)曲线相交时，对应频率处的相角180例题：从下图看系统是否稳定？文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

2、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

3、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

4、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

5、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

6、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

7、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

8、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

9、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

10、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

11、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

12、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

13、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

14、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J43.自激振荡的消除相位补偿技术测试：没有输入信号时，输出端用万用表总能测试到一个固定的电压。用示波器可看到无需要的信号叠加在有用信号上。不需要的信号可能是自激振荡，也可能是噪声。1、滞后补偿文档编码:CC7

15、T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3

16、 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7

17、T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3

18、 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7

19、T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3

20、 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7

21、T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4补偿产生附加相移，使闭环相位增加滞后补偿会导致放大器带宽变窄，只适合对带宽要求不高的场合。2、超前补偿补偿产生附加相移，使闭环相位减少超前补偿使放大器带宽变宽。3、滞后-超前补偿4、内部补偿芯片厂商已经将补偿电路制作在集成电路内部，引出补偿端。按数据表要求，在补偿端加补偿元件。相位补偿难点：文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档

22、编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7

23、V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档

24、编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7

25、V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档

26、编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7

27、V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档

28、编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4按理论公式技术的参数进行调试，结果往往不佳。工程上采用往往实验方法得到最佳元件参数。在实践中积累经验。、达到临界补偿效果，这时的元件参数为最佳值。4.运放的失调电压、失调电流、偏置电流、平衡电阻如果运放两个输入端上的电压均为0V，则输出端电压也应该等于0V。但事实上，输出端总有一些电压，该电压称为失调电压VOS。将输出端的失调电压除以电路的噪声增益，得到结果称为输入失调电压或输入参考失调电压。理想运放的输入阻抗无穷大，因此不会有电流流入输入

29、端。但是，在输入级中使用双极结晶体管(BJT)的真实运放需要一些工作电流，该电流称为偏置电流(IB)。文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T

30、3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3

31、ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T

32、3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3

33、ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T

34、3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3

35、ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4R2要不要呢？如果需要，R2=？若运放为理想运放，输入为0 时，则：0=oV但实际运放有失调电压（VIO），失调电流（IIO），输入偏置电流（IIB）。依据失调电流，输入偏置电流的定义，有：12)12(21BBIOBBIBIIIIII-=+=解方程组，得：在

36、反相端用KCL，有：fBIII+=11foBRVVIRV-+=-?-110ffBfoRRRRIRRRVV+-+=?-11111考虑到失调电压，实际反相端电压为：IOffBfoIOVRRRRIRRRVVVV-+-+=-=-11111而：文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

37、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

38、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

39、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

40、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V

41、8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编

42、码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J422RIVB-=+-+VV将所有参数代入，解得：当 R2=R1/Rf时，0)1(12=+-RRRRff此时由输入偏置电流IIB

43、产生的失调电压为0。R2就是平衡电阻，对失调电压和失调电流补偿5.常见的调零技术1、反相放大器失调电流补偿失调电流的补偿不受反馈元件的影响2、同相放大器失调电流补偿文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 H

44、T3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5

45、J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 H

46、T3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5

47、J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 H

48、T3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5

49、J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4注意：计算增益时要考虑R2的影响，R1 与 R2 串联。3、差分放大器失调电流补偿注意：R4远远小于R3，减小对共模抑制比的影响。6.提高输入电阻提高 Ao，可以增加RF，或减小Ri。注意：电阻值

50、超过1M的大阻值电阻稳定性差，影响放大倍数的线性度和精度。Ri减小会直接影响运放的输入阻抗。文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8U5 HT3U7V8W1S3 ZL2Z5H1H5J4文档编码:CC7T3F3E8