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

TitleAn ultra-low noise, high-voltage piezo-driver
Publication TypeJournal Article
Year of Publication2016
AuthorsN.. C. Pisenti, A.. Restelli, B.. J. Reschovsky, D.. S. Barker, and G.. K. Campbell
Date PublishedDEC

We present an ultra-low noise, high-voltage driver suited for use with piezoelectric 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 switching noise, yielding a total root-mean-square noise of approximate to 100 mu V (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 than 150 mA at +/- 15 V.


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