Best Way To Amplify Current 2

[morizabal]

What is the best method of amplifying output current of op-amp. I need a cheap solution without using power amps.

Thanks

 

[RJ44]

Need to correct that. The resistor reduces the + supply to the op-amp by about .7V and the output swing by the same amount.

Anyway, it works if you can tolerate the reduced swing.

 

[OperaHouse]

I'd think if you wanted to get closer to the rail, the op amp output would drive an appropriately sized resistor and just be wasted (not added to the output). Otherwise the output is limited to the op amp max output - 0.7 volts.

I still give you a star for a creative idea. I love 3 pin regulator circuits - they can even be turned into oscillators (not just by forgetting the cap!).