The transistors below are silicon small-signal switching devices with β = 50. vin is initially 0 Volts. At t = t1, vin becomes +5 Volts and the circuit is allowed to come to equilibrium. At t = t2, vin again becomes 0 Volts and the circuit once again allowed to come to equilibrium.
(a) Sketch vBL, vCL, vBR, and vCR versus time.
(b) What deficiency of this circuit needs to be improved?