> > Sometimes you can trick the LM324 into doing what you want by 
> > loading it
> > with a resistor to one of the supply pins (usually "GND"), thus 
> > keeping the
> > output in the class A mode.
> Can you please explain this.
the issue you are having with the LM324's output stage is probablly crossover distortion as the output stage switches between sourcing and sinking current. you can eliminate this by putting a resistor to the negative supply rail so that no matter what the output voltage it is always sourcing current.


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