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A programmable high voltage electrical switching analyzer for I-V characterization of phase change materials

Prashanth, Bhanu SB and Asokan, S (2007) A programmable high voltage electrical switching analyzer for I-V characterization of phase change materials. In: Journal of Instrumentation, 2 . T07003-1-T07003-10.

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Ovonic Phase-Change Materials have found a renewed interest in the recent times owing to their applications in Non-Volatile Random Access Memories. In the present work, a cost-effective high voltage electrical switching analyzer has been developed to enable investigations on the I-V characteristics and electrical switching of bulk solids, which are necessary for identifying suitable materials for memory and other applications such as power control. The developed set up mainly consists of a PC based programmable High Voltage DC Power Supply which acts as an excitation source and a high speed Digital Storage Oscilloscope. For flexible control options, a Graphical User Interface has also been developed using LabVIEW-6i to control the excitation source through the analog outputs of a data acquisition card. Options are made in the system to sweep the output voltage from 45 to 1750 V or the output current in the range 0-45 mA with resolutions of 1.5 V \& 5 or 50 \mu A at variable rates. I-V characteristics and switching behavior of the sample material are instantaneously acquired on the storage oscilloscope and transferred to PC for post processing. The system can be used to investigate a broad range of materials and some typical results are presented to illustrate the capability of the system developed. The closed-loop stability of the system has also been confirmed by frequency response plots.

Item Type: Journal Article
Publication: Journal of Instrumentation
Publisher: Insitute of Physics
Additional Information: Copyright of this article belongs to Institute of Physics.
Keywords: Analogue electronic circuits;Data acquisition concepts;Voltage distributions;Pulsed power.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 25 Aug 2008
Last Modified: 19 Sep 2010 04:49
URI: http://eprints.iisc.ac.in/id/eprint/15658

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