45W class B amplifier not really class B

165

01:40:38

I found this amp in google images under the name 45w class B amplifier it's not class B it's class AB and it works i builded it but in this simulator it doesnt.

published 10 years ago

hurz

10 years ago

In this configuration its a pure class B amp! Quitesense current is below 1mA. Only interesting thing of this topology is the way how VoltageAdaptationStage and OpAmp part is powered. I guess the 220nF is a mistake and suppose to be 220uF.

AmplifierFAN

10 years ago

http://www.redcircuits.com/Page150.htm here is the amp but class B amplifiers are know for crossover distortion and this amp doesn't have distortion.

hurz

10 years ago

Any amplifier does have distortion

AmplifierFAN

10 years ago

Yes thats true but it's low + I'm not talking about THD (total harmonic distortion) I'm talkong about crossover distortion when both output transistors are off.

hurz

10 years ago

Crossover distortion would result in bad THD

AmplifierFAN

10 years ago

Crossover distortion occurs when the bias is set to the minimum and both outputs are off under 700ml and there is a dead zone.

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