An auxiliary capacitor based ultrafast drive circuit for shear piezoelectric motors

Kamalesh Chatterjee, M. C. Boyer, W. D. Wise, E. W. Hudson

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Shear piezoelectric motors frequently require large voltage changes on very short time scales. Since piezos behave electrically as capacitors, this requires a drive circuit capable of quickly sourcing or sinking a large amount of current at high voltages. Here we describe a novel circuit design using a high voltage amplifier, transistor switching stage, and auxiliary capacitor. This circuit can drive piezoelectric motors at higher speeds and lower costs than conventional methods and with greater flexibility for computer automation. We illustrate its application in a controller for a scanning tunneling microscope coarse approach mechanism and discuss other possible applications and modifications of this circuit.

Original languageEnglish (US)
Article number095110
JournalReview of Scientific Instruments
Volume80
Issue number9
DOIs
StatePublished - Oct 12 2009

All Science Journal Classification (ASJC) codes

  • Instrumentation

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