Consider the circuit in Figure P11.23. Assume the Early voltage of (Q_{1}) and (Q_{2}) is (V_{A}=infty), and

Question:

Consider the circuit in Figure P11.23. Assume the Early voltage of $Q_{1}$ and $Q_{2}$ is $V_{A}=\infty$, and assume the current source $I_{Q}$ is ideal. Derive the expressions for the one-sided differential-mode gain $A_{v 1}=v_{o 1} / v_{d}$ and $A_{v 2}=v_{o 2} / v_{d}$, and for the two-sided differential-mode gain $A_{d}=$ $\left(v_{o 2}-v_{o 1}\right) / v_{d}$.

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