A New Power Supply For Piezoelectric Ceramic Based On PA85

Power supply is the key component in micro piezoelectric actuator's application. PA85 is a high voltage, high precision operational amplifier. This project has developed a new type of PZT driving power supply based on the PA85 complying with the requirement of task of nanotechnology lab for the sake of scholarship of Changjiang River. In recent years, along with the wider application of PZT in the field of precision measurement, abundant research work in PZT driving power supply has been done by the scholars of the national and abroad, and therefore, all sorts of power supply specialized in the framework of micro-displacement range have been developed. This paper has analyzed the merits and disadvantages of different measures, and brought about a proposal of PZT driving power supply which is cored by the PA85, a kind of high precision and high voltage operational amplifier.This paper introduces the entire design proposal of PZT driving power supply first, and then details the design principle of each parts(design of software and hardware included), while the design principle and tolerance compensation of the circuit of amplifier circuit are the keystone for discussion. Finally, the performance of power supply is validated according to the data from experiments, and the improving proposals are mentioned. Since the power supply has high precision, high integration, fine stability, and the circuit is simple, too, the high practical value of the power supply is foreseeable.