【2017年整理】二(4-2)非线性.ppt

2.6 非线性器件的描述方法 1.用解析函数描述 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 差分放大器 双曲正切函数 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2. 幂级数描述 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3. 分段折线描述 适用条件: 大信号输入 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 差分放大器 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.6.2 线性化参数 适用条件: 输入为小信号 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.7 器件非线性的影响 研究有源器件的非线性对线性放大器的影响 研究内容－－出现的现象、名称定义； 衡量性能的指标。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.7.1 输入端仅有一个有用信号 1.谐波（harmonics） Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2. 增益压缩（Gain Compression） 特点：考虑对基波分量的影响（只考虑到三次方） Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 线性 非线性 仅与放大器工作点 不仅与工作点有关 有关 而且与输入信号幅度有关 常数 与信号幅度有关 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 增益1dB压缩点计算： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.7.2 输入端有两个以上信号 问题：对基波输出有什么影响？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Cop