Part a) Determine the values of the unknown resistances in Figure 1, if the Early voltages of the NPN and PNP devices are 75V and 50V, respectively. The current gain of the NPN is 100.
Part b) Determine the open-circuit Voltage gain AV(oc) of this amplifier.
The linear circuit in Fig. 1 is a small-signal AC model of Fig. 2 CE amplifier. The bias of the current mirror and the base current to Q1 is adjusted so that Q1 & Q3 are both in forward-active conduct Ic of 100A.
Determine the values of the unknown resistances in Figure 1, if the Early voltages of the NPN and PNP devices are 75V and 50V, respectively. The current gain of the NPN is 100.
Vcc
Determine the open-circuit Voltage gain Avo of this amplifier.
Q3
2
100A
V.
Fig. 1
Fig. 2