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

Area of Science:

• Electrical Engineering
• Materials Science
• Physics

Background:

• Piezoelectric actuators require precise, high-voltage control.
• Existing drivers often suffer from significant noise or limited voltage output.
• Low-current applications necessitate efficient and stable power delivery.

Purpose of the Study:

• To present an ultra-low noise, high-voltage driver for piezoelectric actuators and similar low-current devices.
• To demonstrate a driver architecture capable of high voltage output with minimal noise.
• To enable sophisticated closed-loop control for precision applications.

Main Methods:

• Utilized a flyback switching regulator for high-voltage generation (up to 250 V, expandable to 1 kV+).
• Incorporated a high slew-rate operational amplifier (op-amp) to suppress switching noise.
• Integrated a low-voltage signal summing capability for closed-loop feedback.

Main Results:

• Achieved ultra-low root-mean-square (RMS) noise of approximately 100 microV over a 1 Hz-100 kHz bandwidth.
• Demonstrated a driver capable of outputting up to 250 V, with potential for >1 kV.
• Enabled direct summation of a low-voltage (±10 V), high-bandwidth signal onto the output.
• Implemented digital control for repeatable setpoints and complex logic.
• Maintained low power consumption (<150 mA at ±15 V).

Conclusions:

• The developed driver offers a robust solution for high-voltage, low-noise applications.
• Its design facilitates precise control of piezoelectric actuators and other sensitive electronic components.
• The integration of digital control and feedback capabilities enhances its suitability for advanced scientific and engineering tasks.