对于负反馈的增益Af=A/(1+AF)，定义分母1+ A(s)B(s)=F(s)为反馈深度。反馈深度是一个十分重要的参数，表示引入反馈后放大电路的放大倍数与无反馈时相比所变化的倍数。
其中最重要的是我们有深度理解的水气反馈，以及我们不甚理解的云反馈。
The most important involve water vapour, which is now quite well understood, and clouds, which are not.
该带隙电压基准源电路中的深度负反馈运算放大器为低失调、高增益的折叠型共源共栅运算放大器。
A deep negative feedback operation amplifier used in band gap reference is a common source and gate folded cascade operation amplifier with a lower offset voltage and a higher gain.
T2编码器由已编码比特率自适应地反馈控制编码深度，完成优化截取。
T2 encoder sends feedback to control the coding depth by the accumulated bit rate and complete the rate-distortion optimization truncation.
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