An all-digital cantilever controller for MRFM and scanned probe microscopy using a combined DSP/FPGA design

D. De Roover, L. M. Porter, A. Emami-Naeini, J. A. Marohn, S. Kuehn, S. Garner, D. D. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An all-digital cantilever controller for magnetic resonance force microscopy (MRFM) was developed through a close collaboration between SC Solutions, Cornell University, and the U.S. Army Research Laboratory. The advantage of an all-digital controller is its absence of thermal drift, as well as its great tuning flexibility. This versatile controller is comprised of a Field Programmable Gate Array (FPGA) connected via a low-latency interface to an analog input, an analog output, and a Digital Signal Processor (DSP) with additional analog outputs. Performance of the controller was demonstrated in experiments employing ultra-sensitive silicon microcantilevers fabricated at Cornell University's Nanoscale Science and Technology Facility. The all-digital cantilever controller successfully measured 5 millihertz shins in a 5 Hz detection bandwidth in the resonance frequency of these ultra-sensitive microcantilevers on a millisecond timescale. Independently, a noise floor of 40 microhertz in one second was measured for this controller.

Original languageEnglish (US)
Title of host publication2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
Pages40-43
Number of pages4
StatePublished - Aug 23 2007
Event2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007 - Santa Clara, CA, United States
Duration: May 20 2007May 24 2007

Publication series

Name2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
Volume4

Other

Other2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007
CountryUnited States
CitySanta Clara, CA
Period5/20/075/24/07

Keywords

  • All-digital cantilever control
  • DSP
  • FPGA
  • MRFM

ASJC Scopus subject areas

  • Mechanical Engineering

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  • Cite this

    De Roover, D., Porter, L. M., Emami-Naeini, A., Marohn, J. A., Kuehn, S., Garner, S., & Smith, D. D. (2007). An all-digital cantilever controller for MRFM and scanned probe microscopy using a combined DSP/FPGA design. In 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings (pp. 40-43). (2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings; Vol. 4).