Sensors, Vol. 20, Pages 6528: A High-Voltage and Low-Noise Power Amplifier for Driving Piezoelectric Stack Actuators

Sensors, Vol. 20, Pages 6528: A High-Voltage and Low-Noise Power Amplifier for Driving Piezoelectric Stack Actuators
Sensors doi: 10.3390/s20226528
Authors:
Xu
Li
Li
Ge

In this paper, based on the principles of general operational amplifiers, a high-voltage operational amplifier is developed. Considering the influences of piezoelectric stack actuators on the circuit, a novel structure using the high-voltage operational amplifier as a noninverting amplifier is proposed. Because of the simple circuit principles and the voltage feedback control structure, the proposed power amplifier has the advantages of low noise and small size, and it can be realized by discrete electric elements easily. In the application of precision positioning, a power amplifier using the proposed circuit principles for driving piezoelectric stack actuators is designed, simulated, and tested. The simulated results show that the proposed power amplifier could conform to the theory of the circuit. The experimental results show that the designed power amplifier conforms to the simulation, the bandwidth of the power amplifier is about 57 kHz, and the ripple of the power amplifier is less than 2 mV. Furthermore, the output of the proposed power amplifier maintains the same type of wave within in a large range of frequency, while the input is the sinusoidal or square wave, and the resolution of the mechanism which the power amplifier is applied in is about 4.5 nm. By selecting the critical ele...

Source: Sensors - November 15, 2020 Category: Biotechnology Authors: Xu Li Li Ge Tags: Article Source Type: research