A diff-amp is biased with a constant-current source (I_{Q}=0.25 mathrm{~mA}) that has an output resistance of (R_{o}=8

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A diff-amp is biased with a constant-current source \(I_{Q}=0.25 \mathrm{~mA}\) that has an output resistance of \(R_{o}=8 \mathrm{M} \Omega\). The bipolar transistor parameters are \(\beta=120\) and \(V_{A}=\infty\). Determine

(a) the differential-mode input resistance and

(b) the common-mode input resistance.

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