June 14, 2015
June 14, 2015
June 17, 2015
26.187.1 - 26.187.12
An Inexpensive Curve Tracer for Introductory Electronics Laboratory CoursesAmong the fundamental topics of introductory electronics courses are the I-V characteristics ofbasic electronic devices—diodes, MOSFETs, and BJTs. However, the expense of a dedicatedcurve tracer would not be justifiable in an introductory electronics laboratory. An easy-to-operate device capable of obtaining the I-V characteristics of basic electronic devices would behighly beneficial, especially if it were sufficiently inexpensive and easy to construct that a curvetracer could be made available for each bench. The device described herein meets theserequirements. Operating in conjunction with typical laboratory equipment (an oscilloscope withx-y display capability, a triangle-wave signal generator, and a triple-output dc power supply), it iscapable of displaying the I-V characteristics of diodes, PMOS and NMOS devices, and NPN andPNP devices at device currents up to ±30mA and voltages up to ±24V. It includes a voltage-controlled base-current generator capable of ±100μA for characterizing BJTs. Currents in thesemiconductor device under test are converted to voltages by means of a transresistanceamplifier. This paper will describe the circuit and its implementation as well as its curricularintegration. Sample results from student work using these curve tracers is included.
Beams, D. M., & Ochoa, H. A. (2015, June), An Inexpensive Curve Tracer for Introductory Electronics Laboratory Courses Paper presented at 2015 ASEE Annual Conference & Exposition, Seattle, Washington. 10.18260/p.23526
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