a.) Consider a two-BJT configuration in Figure 1. You may assume that both transistors are the same with the same β, VBE,on = 0.7 V, and VCE,EOS = 0.3 V. Determine the minimum voltage VBE that will...

a.) Consider a two-BJT configuration in Figure 1. You may assume that both transistors are the same with the same β, V_BE,on
= 0.7 V, and V_CE,EOS
= 0.3 V.

Determine the minimum voltage V_BE
that will turn ON both Q1 and Q2.

b.) Using the BJT small-signal model given in Figure 2,
determine the AC current gain A_i
= i_out/i_in
for the circuit given in Figure 3. Assume r_o
>> r_π.
You may assume that β is large.

Extracted text: i out BO Q1 + Q1 VCE BO in VBE Bi, Q2 Q2 E Figure 2 E Figure 3 Figure 1