An ultra-low noise, high-voltage piezo-driver

We present an ultra-lownoise, high-voltage driver suited for use withpiezoelectric actuators and other low-current applications. The architecture uses a flyback switching regulator to generate up to 250 V in our current design, with an output of 1 kV or more possible with small modifications. A high slew-rate op-amp suppresses the residual switchingnoise, yielding a total root-mean-squarenoise of ≈100μV (1 Hz –100 kHz). A low-voltage (±10 V), high bandwidth signal can be summed with unity gain directly onto the output, making the driver well-suited for closed-loop feedback applications. Digital control enables both repeatable setpoints and sophisticated control logic, and the circuit consumes less tha n 150 mA at ±15 V.

Source: Review of Scientific Instruments - December 8, 2016 Category: Physics Authors: N. C. Pisenti, A. Restelli, B. J. Reschovsky, D. S. Barker and G. K. Campbell Source Type: research