I am using proven equations for 2N2222A hybrid PI model. I calculated and simulated amplifier stages
with defined (choosen by myself) Icq = 10 mA, Icq = 7 mA and Icq = 1 mA . For 10 and 7 mA , the result of my equation for AC voltage gain is very near the simulated one. But for Icq = 1 mA, there is very large deviation, in simulation I see value of 32.2 , but my equations produce value of 86.
Is this normal behavior? Am i supposed not to use such low current as the 1 mA for collector quiescent current and using it inside equations for hybrid PI model?
I use equations from included PDF for calculation of AC voltage gain.
with defined (choosen by myself) Icq = 10 mA, Icq = 7 mA and Icq = 1 mA . For 10 and 7 mA , the result of my equation for AC voltage gain is very near the simulated one. But for Icq = 1 mA, there is very large deviation, in simulation I see value of 32.2 , but my equations produce value of 86.
Is this normal behavior? Am i supposed not to use such low current as the 1 mA for collector quiescent current and using it inside equations for hybrid PI model?
I use equations from included PDF for calculation of AC voltage gain.
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