The SMU is a precision power supply device that can measure not only high-resolution voltage sources but also high-resolution current sources. It also integrates bipolar voltage and four-quadrant output functions to facilitate testing of various characteristics.
By providing a linear sweep voltage and sweep current, the IV characteristic curve of the instrument can be obtained. In photovoltaic research laboratories, for example, SMUs are often used to vary the voltage applied to lighting solar cells while measuring current. This voltage sweep allows us to plot the IV characteristics of the solar cell and calculate its optical power conversion efficiency.
μSMUs are not meant to replace precision SMUs, but to complement them in cost-sensitive areas where accuracy is not required.
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