A determine the currents i1 i2 i3 i4 ib2 and ib3nbspfor the

Question

For the transistors in the TTL circuit in Figure, the parameters are β_F = 20 and β_R = 0.

(a) Determine the currents i₁, i₂, i₃, i₄, i_B2, and i_B3 for the following input conditions: (i) v_X = v_Y = 0.1 V, and (ii) v_X = v_Y = 5 V.

(b) Show that for v_X = v_Y = 5 V, transistors Q₂ and Q₃ are biased in saturation.