Also use dc negative feedback between the Sziklai input and the output of the amplifier
@bob_mosavo
4 ай бұрын
Thanks 👍
@Dazzwidd
Ай бұрын
Why not put the Sziklai in the bottom end of the output bias arrangement, eliminating one transistor stage. Just have a low emitter resistance in it of say 22 ohms.
@Electronics4Guitar
Ай бұрын
@@Dazzwidd all good approaches and there are many more possibilities but this video was just intended to demonstrate how multiple stage circuits would be analyzed based on the material I’ve covered up to this point. This amplifier isn’t intended to be a great design, or even a good one. It’s simply a vehicle for demonstration of basic analysis techniques.
@jakep8484
4 ай бұрын
I would try to use as few coupling caps and would add emitter resistors on the finals.
@Electronics4Guitar
4 ай бұрын
I agree. But I haven’t covered direct coupling in the tutorials yet. This amplifier was designed as an exercise in the analysis of capacitively coupled circuits. And it demonstrates the problems with using capacitively coupled, class-A amplifiers when large signal swings are desired. I’ll get to direct coupling soon.
@heidicoren4054
4 ай бұрын
Thank you for good explanation
@Electronics4Guitar
4 ай бұрын
Glad it was helpful!
@AnalogDude_
4 ай бұрын
Why would you do all this trouble and not get a nice NE5534 or OPA1677 to connect this to the push pull setup or C4? Feedback from the push pull output to the inverted input of the opamp and your crossover distortion should be solved not using the diodes, like the push pull circuit from the known encyclopedia. tried it in the sim, turning this opamp to voltage follower and the zero cross distortion returns, I have also drawn a Sziklai push pull from thin air, but now i learned about R12, R13, C6, C7. I just used 1M to pull up / down for R10, R11 to the bases to force them transistor closed. The Falstad sim shows it works fine.
@Electronics4Guitar
4 ай бұрын
I’ll put the transistors in the feedback loop after I cover that concept in the context of op amps. And I’ll show why that isn’t necessarily the panacea that it would appear to be. There’s a method to my madness. All in good time.
@AnalogDude_
4 ай бұрын
@@Electronics4Guitar Ya, using transistors may add some unique sound flavor, but i wanna make something to replace my 5€ pc speakers.
@Electronics4Guitar
4 ай бұрын
I hear ya 👍🏻
@victimovtalent6036
4 ай бұрын
R Th is R thevenin?
@victimovtalent6036
4 ай бұрын
@@Electronics4Guitar can we use symetrical power supply for this circuit design?
@Electronics4Guitar
4 ай бұрын
@@victimovtalent6036definitely. The output stage could be operated from a bipolar supply with no modification (you could eliminate the output coupling cap). The two driver stages would need to be redesigned though and would still require capacitive coupling.
@Electronics4Guitar
4 ай бұрын
@victimovtalent6036 yes, it’s the Thevenin equivalent resistance. I should have noted this.
@victimovtalent6036
4 ай бұрын
@@Electronics4Guitar thank you for your explanation,i'm very appreciate👍🙂
Пікірлер: 17