VFB与CFB比较1MT-034TUTORIALCurrentFeedback(CFB)OpAmpsINTRODUCTIONInthistutorialthetwobasicopamptopologies―voltagefeedback(VFB)andcurrentfeedback(CFB)―arediscussedinmoredetail,andthedifferencesarepointedout.ThebasicvoltagefeedbackopampalongwithgainequationsisrepeatedhereinFigure1.VIN+A(s)=OPENLOOPGAIN
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