The circuit and transistor parameters of the bipolar diff-amp shown in Figure P11.78 are (I_{Q}=200 mu mathrm{A},

Question:

The circuit and transistor parameters of the bipolar diff-amp shown in Figure P11.78 are $I_{Q}=200 \mu \mathrm{A}, \beta_{\text {npn }}=125, \beta_{\text {pnp }}=80, V_{B E}($ on $)=$ $V_{E B}($ on $)=0.7 \mathrm{~V}, V_{A N}=100 \mathrm{~V}$, and $V_{A P}=60 \mathrm{~V}$.

(a) What are the minimum power supply voltages (assume symmetrical supply voltages) if the common-mode input voltage is to be in the range of $\pm 2 \mathrm{~V}$.

(b) What is the differential-mode voltage gain?

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