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Hi.
It seems to me that 0.44mA is a peak-to-peak value, while 0.16mA is a peak theoretical value..
So you should compare 0.16 with 0.44/2=0.22
Not exactly equals but sounds good to me.
The biasing of your amplifier is not correct.BJT works near to saturation mode..
But in my case it is converse, pen and paper gm is 16 but the simulation show more than 4 times greater!
16*0.01 = 160 mA, not 0.16 mA. According to your calculation method, Iac,pk should be 160 mA but it's 44 mA.But in my case it is converse, pen and paper gm is 16 but the simulation show more than 4 times greater!
44/16 is not 4, and as I said above, the amplitude of ic is actually 0.44/2 which is 0.22V.
0.44 V is a peak-to-peak value while 0.16 V is not
So you get 0.22 instead of 0.16 which is not that surprising
pif
16*0.01 = 160 mA, not 0.16 mA. According to your calculation method, Iac,pk should be 160 mA but it's 44 mA.
I need to analyze power amplifier so current is rather high, but you said it is near saturation region, plz tell me why? and also I repeat this design and simulation with 2n3904,( other items were intact, therefore Ic = 290mA and vce>4 volt ) and the result is the same.
44m is peak current. so peak to peak is about 90mA.
"Not acceptable" means you didn't yet think about the given explanations for non-ideal transistor behavior. 2N2222 SPICE model has a RE=0.2 emitter bulk resistor parameter which well explains the observed results. You get 1/gm,eff = 1/gm,ideal + RE. A plot of Vbe over Ic visualizes the effect. You get 10% reduction of effective gm at 13 mA.OK. you are right but 44 is near 1/4 of 160 and I think it is not acceptable result!
"Not acceptable" means you didn't yet think about the given explanations for non-ideal transistor behavior. 2N2222 SPICE model has a RE=0.2 emitter bulk resistor parameter which well explains the observed results. You get 1/gm,eff = 1/gm,ideal + RE. A plot of Vbe over Ic visualizes the effect. You get 10% reduction of effective gm at 13 mA.
View attachment 159266
Other effects discussed in this thread like output resistance or saturation voltage play a role, but are not significant in this case.
10% at 13 mA, rising.Second. As you said above it is about 10% but in my simulation it it about 75%.
What do you mean with "voltages trivial"? Apparently you have problems to understand the trivial relations. Collector current is controlled by Vbe, RE is acting as series-series feedback reducing effective gm. Review the formula I posted above, try to understand it. Sketching an equivalent circuit with RE should help.
10% at 13 mA, rising.