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Question 3.3: Apply SPICE methods to determine the CE transfer characteris......

Apply SPICE methods to determine the CE transfer characteristics for the generic npn transistor (QNPNG).

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Figure 3-6(a) presents the connection method chosen for determination of the transfer characteristics.    The associated netlist code follows:

Ex3_3.CIR
Vbe 1 0 0V
Q 2  1 0 QNPNG
Vc    2 0 1V
.MODEL QNPNG NPN(Is=10fA Ikf=150mA Isc=10fA Bf=150
+ Br=3 Rb=1ohm Rc=1ohm Va=30V Cjc=10pF Cje=15pF)
.DC Vbe 0V 2V 0.01V Vc 0V 2V 0.2V
.PROBE
.END

Execution of 〈Ex3_3.CIR〉 and use of the Probe feature of PSpice yields the desired transfer characteristics displayed by Fig. 3-6(b).

3.6

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