Chapter 3

Q. 3.4

Using SPICE methods, determine the CB collector characteristics for the generic pnp transistor (QPNPG).


Verified Solution

Figure 3-7(a) shows the circuit for use in the determination.    The netlist code below describes that circuit.

Ie      0 1 0mA
Q 2   0 1 QPNPG
Vcb  2 0 0V
.MODEL QPNPG pnp(Is=10fA Ikf=150mA Isc=10fA Bf=150
+ Br=3 Rb=1ohm Rc=1ohm Va=30V Cjc=10pF Cje=15pF)
.DC Vcb 1V -15V 1V Ie 0mA 100mA 10mA

Execution of 〈Ex3_4.CIR〉 and use of the Probe feature of PSpice results in the desired CB collector characteristics of Fig. 3-7(b).