Timeline for How does a cross-over BJT's damp the distortion with help of negative resistive feedback in an analog audio amplifier?
Current License: CC BY-SA 4.0
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| Aug 6, 2018 at 12:13 | vote | accept | CommunityBot | ||
| Aug 6, 2018 at 12:09 | comment | added | Bimpelrekkie | there is absolutely nothing that op-amp can do No, there is. The opamp amplifies the error Vin-Vout and uses that as compensation for any distortion. See your formula: as A increases the transfer becomes equal to 1/beta. As long as the opamp has enough gain at it's disposal, it will supress any distortion in the forward path of the loop | |
| Aug 6, 2018 at 11:33 | comment | added | user140508 | Great, I'm almost there, but, as you and i can see and you said, we see the pre-distortion right at the out out of op-amp, and as you suggest, the loop gain suppresses the distortion, i agree, but between the output of op-amp (amplified signal + distortion) and the output stage (amplified signal + almost no distortion) there is absolutely nothing that op-amp can do there is only this cross-over transistors configuration. Clearly i'm confusing things, but i don't see it. Thank you | |
| Aug 6, 2018 at 10:51 | history | edited | Bimpelrekkie | CC BY-SA 4.0 |
added 358 characters in body
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| Aug 6, 2018 at 10:40 | history | answered | Bimpelrekkie | CC BY-SA 4.0 |