My setup is this - OPA548 opamp - 1:20 transformer - piezo at 100KHz
I'm getting slew rate distortion when i output over 30Vpp from the opamp, driving the piezo at over 600Vpp. This is to be expected from the datasheet. The circuit itself is tried and tested over several months and is fully functional.
My question is this - if i add an inductor in series with the piezo thus reducing/cancelling the impedance of the piezo will I be able to drive the volts higher without slew rate distortion?
My thought is that theoretically I should be able to drive the piezo with more volts - but I tried this and it didn't seem to make any difference.
Regards,
Szzuk.
I'm getting slew rate distortion when i output over 30Vpp from the opamp, driving the piezo at over 600Vpp. This is to be expected from the datasheet. The circuit itself is tried and tested over several months and is fully functional.
My question is this - if i add an inductor in series with the piezo thus reducing/cancelling the impedance of the piezo will I be able to drive the volts higher without slew rate distortion?
My thought is that theoretically I should be able to drive the piezo with more volts - but I tried this and it didn't seem to make any difference.
Regards,
Szzuk.