Ro后=Uo后/Io后=707.08u/17.493u=40.4Ω

5、验证AF?1/F

7R310kΩR1100kΩC32C110μF8V1R21mVpk 10kHz 30kΩ0° R10500Ω1R42kΩC210μF10Q1XMM12N2222A920μF

XSC1R620kΩR83.2kΩ+Ext Trig+_A_+B_36Q2C520μF11XMM2V212 V R53.9kΩ42N2222AR715kΩR92.2kΩC420μF0S1Key = A 12C620μF5R115kΩ

F=UR10/UR5=705.455u/7.536m=0.0936 1/F=10.684，AF=Au后=10.66 故得：AF?1/F，E=（1/F- AF）/AF

=(10.684-10.66)/10.66

=0.23%

6、给出负反馈接入前后电路的频率特性和fL、fH值，以及输出开始出现失真时的输入信号幅度

负反馈接入前后电路的频率特性和fL、fH值

7R310kΩR1100kΩC32C110μF8V1R21mVpk 10kHz 30kΩ0° R10500Ω1R42kΩC210μF10XMM1Q120μF36Q2C520μFXMM2V212 V R53.9kΩ411R620kΩR83.2kΩ2N2222A9R715kΩ2N2222AR92.2kΩC420μF0S1Key = A 12C620μF5R115kΩ

负反馈接入前

fL=231.0114Hz fH=97.1872kHz

负反馈接入后（电路图上开关合上）

fL=39.3850 fH=4.3089MHz