Question: A basic bipolar input diff-amp stage is shown in Figure 14.22. Use standard transistors and other appropriate circuit parameters. Let (v_{1}=v_{2}=0). (a) Plot (i_{C 1})

A basic bipolar input diff-amp stage is shown in Figure 14.22. Use standard transistors and other appropriate circuit parameters. Let $v_{1}=v_{2}=0$.

(a) Plot $i_{C 1}$ and $i_{C 2}$ as a function of the wiper arm position $x$.

(b) Plot the collector voltage of $Q_{4}$ as a function of wiper arm position $x$.

Offset- null terminal (3) Q1 Q2 Tici ic2 23 + + VBE3

Offset- null terminal (3) Q1 Q2 Tici ic2 23 + + VBE3 UBE4 ww R X 1-x ww Ry 24 ww Offset- null terminal Figure 14.22 Basic bipolar input diff-amp stage, including a pair of offset-null terminals connected to a potentiometer

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