Example 4.9: Calculating Voltage Gain Of A Transistor Amplifier

** Circuit Description **
* dc supplies
Vcc 1 0 DC +10V
Vbb 5 0 DC +3V
* small-signal input
Vi 4 5 DC 1mV
* amplifier circuit
Q1 2 3 0 npn_transistor
Rc 1 2 3k
Rbb 4 3 100k
* transistor model statement
.model npn_transistor npn (Is=1.8104e-15 Bf=100)
** Analysis Requests **
* calculate small-signal transfer function: Vo/Vi
.TF V(2) Vi
* we shall also calculate the small-signal parameters of the transistor
.OP
** Output Requests **
* none required 
.end