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LOW-COST CURRENT-TO-VOLTAGE CONVERTER FOR DC MEASUREMENTS IN A WIDE DYNAMIC RANGE

Pavel Protiva
  • Abstract:
    A logarithmic current-to-voltage converter for measuring DC currents in a wide dynamic range (from 1 pA to 1 mA) is described here. The converter is based on an operational amplifier circuit with a standard commercially-available LED diode used as a nonlinear feedback. A temperature compensation method requiring only one reference amplifier was used. This significantly reduces the complexity and the resulting cost of the converter. The static transfer characteristics of the converter were measured and compared with the uncompensated case.
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  • DOI:
    _unreg_tc4-2008.013

Event details:

  • IMEKO TC:
    TC4
  • Event name:
    Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
  • Title:
    XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation (together with 13th IMEKO TC4 Workshop on ADC Modelling and Testing)
  • Place:
    Florence, ITALY
  • Time:
    22 September 2008 - 24 September 2008