For all the transistors in the Fig. below, ?F=100, |VBE|=0.65 V, VA=50 V and VT=25.9 mV are

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For all the transistors in the Fig. below, ?F=100, |VBE|=0.65 V, VA=50 V and VT=25.9 mV are given. For hand calculations assume that the capacitor values are infinite. For Spice you can assume them as 10 ?F. a) Calculate the DC operating points of the circuit. b) Calculate the small signal gain of the circuit which is defined as Vo/Vg. c) Calculate input and output resistance. (Ri and Ro) d) Vg is the sinusoidal input signal with 5 mV amplitude. Draw the waveforms at A, B, C, D, E nodes with their AC and DC values.

Rg 1kn +Vcc=15V RE2 RBI 300k RB2-56ko T2 RcI 750 B T1 +Vo REI-820 Vg RE2-5600 ORy Rc2 Rc2 2.4k Ry 2kn Ri