Low-cost current-to-voltage converter for DC measurements in a wide dynamic range
نویسنده
چکیده
Abstrac t-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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