7-16 Amplifier is shown as Fig7-40 (1) in order to stabilize A, and small R., great R, how to introduce the feedback, draw the feedback and explain the type of your feedback (2) if we request A =20, determine the value of feedback resistance. +15V VT, IkQ VD, IkQ VD2 R₁ Οι VT20% 오 -15V OR ° C- Fig7-40 题7-16图