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对负反馈放大电路增益估算的误差研究
资料介绍
工程应用中,负反馈放大电路的增益常用估算的方法获得。选取各种组态的负反馈放大电路实例,对其电压增益进行估算和实际计算,研究估算的相对误差与负反馈深度的关系,结合理论推导,得出结论:由集成运放组成的以及多级的负反馈放大电路,它们极易形成深度负反馈,增益估算的误差较小,而由分立元件组成的单级放大电路,大多不易形成深度负反馈,估算误差较大;负反馈越深,估算误差就越小;估算的相对误差与负反馈深度的乘积等于1。
In engineering applications, the gain of a negative feedback amplifying circuit is commonly obtained by an estimation method. The negative feedback amplifying circuit examples of various configurations are selected, and the voltage gain is estimated and calculated. The relationship between the estimated relative error and the negative feedback depth is studied. Combined with the theoretical derivation, it is concluded that both the negative feedback amplifying circuits consisted of integrated operational amplifier and the multi-level negative feedback amplifying circuits are easy to form deep negative feedback, the gain estimation error is small;and the single-stage amplifying circuit composed of discrete components is not easy to form deep negative feedback, the estimation error is large;the deeper the negative feedback, the smaller the estimation error is;the product of the estimated relative error and the negative feedback depth is equal to one.
部分文件列表
| 文件名 | 大小 |
| 对负反馈放大电路增益估算的误差研究.pdf | 865K |
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