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It will likely work close to your simulation results if you follow proper design procedures such as a good layout, heat sinking, and supply decoupling, but no guarantee.
If you can, do some Monte Carlo simulation multiple runs to see how component variations (including supply voltage variation and offset) affects the amp performance (I assume this is a audio power amp).
Check the distortion at different load impedances and voltage output levels.
Check the output voltage clipping levels.
Check the quiescent current level.
Check the operation at various circuit temperatures (including having the output transistors at a high temperature than the rest of the circuit).
The more simulations you do of various operating conditions, the better your chance of the circuit working as you intended.
Don't be in a rush to build the circuit. To paraphrase an old saying "Measure twice (or more) and build once".
How how, I wired the input stage on a breadbread and tested with an output stage outside the breadboard.
Output stage was mosfet one working with an opamp perfectly.
Today i tried with bdx53/54 but i forgot R1 and now bjts are dead
one minute before i was thinking of lamp protection in the mains
You said: Don't be in a rush to build the circuit. To paraphrase an old saying "Measure twice (or more) and build once".
Now im waiting for tommorow, new parts, another try.
I updated multisim to see what happens with tip126/120 and im scared.
In reality is maybe some amps but here and there is only 600ma Iq. I dont know what's next. Im confused. 600 ma is not dangerous.. :roll:
:drevil: :smile:
P.S. Im not sure if 100ohm bulb would save my transistors.
I know its resistance go higher dynamically but im not sure :bsdetector:
Okay guys this "thermotraking" is a little stupid here because the diode in the transistor shunts the CE and cant make 1.5 diodes drop.
However, i tried again this time with 220v 100ohm lamp between output emitters.
it worked and i measured the voltage across the lamp, from there i know the standby current was 10-20 ma.
i removed the lamp and tried, it worked touching the signal cable.
I plugged in the laptop and searched for music.
It failed before i found the music.
now another power transistors are dead
is this oscillation issue ?
from the double bootstrapping that is my idea and never seen it before ?
If it is osc, is 10nF between the bases cure the problem ?
Yes I have.
I tried this and it worked 30-40min until I pushed the bias up a little and destruct it.
I am not using bootstrap here because i dont know if it good or bad.
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