The Design of a High-voltage Charge-feedback Piezoamplifier
نویسندگان
چکیده
This paper presents the design and development of a high-voltage charge-feedback amplifier for controlling the displacement of piezoelectric devices to account for hysteresis. In particular, we discuss the details of the design and characterize the performance of the amplifier in terms of output power, bandwidth, and reduction of hysteresis for an experimental piezoactuator. We note that charge-feedback control can minimize the effect of hysteresis in the output displacement of piezos. As a result, precise control of piezos can be achieved for emerging applications such as scanning probe microscopy, micropumps, and actuators for nanomanipulation. The amplifier’s effectiveness is demonstrated by applying it to actuate a composite piezoelectric device and results show reduction of hysteresis by over 80%.
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