Nikolov, Georgi; Николов, Георги

High current source-measure unit based on low cost DAQ

2008

Proceedings of the Technical University – Sofia, 58(2), 2008, pp. 93-98

Технически университет - София

1311-0829 [issn]

Article

eng

device characterization, LabVIEW, source-measure unit, virtual Instruments, voltage controlled current source

The development of a high current source-measure unit based on multifunctional low cost data acquisition board, graphical development environment and a circuit of voltage controlled current source is presented in this paper. Such development is motivated by capability of source-measure units to acquire data, generate I-V curves, and otherwise characterize various device performances. As a part of proposed development some considerations concerning high current sources are presented and some aspects of circuit design are treated. Because the circuit traditionally is used only as current generator, in this paper is suggested innovative approach to use this current source as voltage generator. The approach consists basically in implementation of software loop that continuously calculate resistance of device under test and control the output voltage. The developed virtual system can be used for circuit and device evaluation, where a DC signal must be applied to a device under test and the response to that signal must be measured.

Reviewer prof. Marin Marinov. - Formulas, diagr., schemes - References, pp. 98