Question: A BJT cascode amplifier with a cascode active load is shown in Figure P10.89. Assume transistor parameters of (beta=120) and (V_{A}=80 mathrm{~V}). The (V_{B B})

A BJT cascode amplifier with a cascode active load is shown in Figure P10.89. Assume transistor parameters of $\beta=120$ and $V_{A}=80 \mathrm{~V}$. The $V_{B B}$ voltage is such that all transistors are biased in the active region. Determine the small-signal voltage gain $A_{v}=v_{o} / v_{i}$.

24 V+=5V Q3 Qs VBias Q2 IREF= 250 Vi + + VBB

24 V+=5V Q3 Qs VBias Q2 IREF= 250 Vi + + VBB Figure P10.89

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