Consider the BJT op-amp circuit in Figure P13.5. The transistor parameters are: β(npn) = 120, β(pnp) = 80, VA = 80 V (all transistors), and base- emitter turn-on voltage = 0.6 V (all transistors).
(a) Determine the smallsignal differential-mode voltage gain.
(b) Find the differential-mode input resistance.
(c) Determine the unity-gain bandwidth.