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Digital feedback control loops for scanning tunneling microscopes (1991)

Morgan, B. A. ; Stupian, G. W.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 62 (1991), S. 3112-3113

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: Many circuit functions can now be realized using digital rather than analog techniques. The application of digital signal processing (DSP) technology for the implementation of the feedback control loop of a scanning tunneling microscope is discussed. A system that utilizes a commercially available PC AT-compatible plug-in card based on the Texas Instruments TMS320 series of digital processing chips to implement a loop controller of the proportional-integral-differential type is described. The advantages afforded by DSP in comparison to analog systems include greater flexibility in the choice of the signal processing algorithm and greater ease of control of loop parameters by the host computer.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1142167

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