Power Amp with Sziklai output pair

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01:33:07

Power Amp with Sziklai output pair.

https://en.wikipedia.org/wiki/Sziklai_pair

published 2 years ago

Jatorres

2 years ago

One advantage over the Darlington pair is that the base turn-on voltage is only about 0.6 V, or about half of the Darlington's 1.2 V nominal turn-on voltage. Like the Darlington, it can saturate to only about 0.6 V, which is a drawback for high-power stages.

JoDaGi

2 years ago

I make that 67.8dB, am I right?

Jatorres

2 years ago

Ok you have: Vout= 13.9 Vrms and Vin=0.353Vrms. Given that the gain is: 13.9/0.353=39.37. Since dB=20LogVout/Vin you have a gain of 31.90dB. Another form to calculate that is going to the feedback loop in such a case you have Af=(15K/390)+1 =39.46 which expressed in dB terms gives you a gain of 31.92 dB. If you want to adjust the gain, just move the value of the 15K resistance.

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