sandeepkiranv
Advanced Member level 4
Can we use op amp for dc voltage amplification ? Does DC amplifier and DC to DC converter represent same ?
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No. Op-amp outputs are always within the limits of their supply voltage, never higher. They can amplify a small DC signal, but only up to the limit of their supply.
It takes a DC-DC converter to create a higher voltage from a lower one.
I used an op amp to amplify a DC voltage. I was measuring current through a wire (by measuring voltage differential across it). The real value was between 0 and 40 mV. I adjusted op amp gain to be 200x. This gave me an output from 0 to 8V.
So this was DC amplification.