Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [iv-curve]

17 questions
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Why are the IV curves of capacitors and inductors ellipses?

I don't really know what the difference is between a regular diode, a zener diode, a schottky diode or an LED. Neither do I knoe the difference beetween a DIAC, a TRIAC or even a NPN transitor. The way I see it, the difference lies on the IV curves,…
Dau
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For measuring IV curves, could you use a current source and measure the voltage?

I was trying to find other experiments that required getting an IV curve but all of them seem to be applying voltage and measuring the current.
Laura
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LEDs seem to automatically self-regulate to achieve ideal voltage across terminals

Note: the key question is now in bold at the bottom, for the people who have had trouble figuring out what I'm trying to ask. Sorry about the meandering explanation. I've been experimenting with resistive droppers lately, and designed the following…
ad555
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Transistor Ic vs Vce Curve Trace for one 2N3906 Shows Weird Scope Display Not Sure Why

I recently built a transistor curve tracer on a breadboard with my Oscilloscope and Arbitrary Waveform Generator. Most BJT Si transistors (NPN and PNP) show typical/normal traces but one device under test - a 2N3906 - produces abnormal trace when…
Ron at BiophysicsLab
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BAV99 forward voltage

I am reading the BAV99 datasheet from ON Semiconductor. From the table on ELECTRICAL CHARACTERISTICS (page 2) (TA = 25°C unless otherwise noted) (Each Diode) Forward Voltage mVdc IF = 1 mAdc 715mV IF = 10 mAdc 855mV IF = 50…
Hasan alattar
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PV cells (photovoltaic) I-V curve plot simulation

I am trying to plot the I-V curve using python because that helps me in understanding PV cells / solar panels (and diodes as a general thing). I know the formulas have lots of inter-dependent variables (like voltage with temperature and current with…
TPPZ
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Is there anywhere I can download BJT Transistor I-V data?

Is there anywhere I can download some current-voltage data for a bipolar junction transistor? (It doesn't matter that much which one.) To explain further, for a simple BJT circuit we have the following variables. (Assuming NPN.) Base-Emitter…
user3728501
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IV curve has non zero current in open circuit condition

I have an IV measurement program running in LabVIEW, where I measure the IV curve of a photovoltaic module using a programmable electronic load from a quick backward sweep (from Voc to Isc.) I have a really long 10 sq. mm DC wire (ca. 50m) between…
Basant
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PV operation points due to load changes

I couldn't find anywhere what happens to the operation point of a PV cell, when, a resistance (load) connected straight up its output, changes (step) from one value to another. With other words, suppose A is the operation point under load R1 and B…
Chris
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What effect does resistance have on a diode's characteristics? (regarding IV curves)

I can't seem to find much information online regarding resistance values and diode behaviour. Am I right in saying that the IV curve of a diode is independent of any external resistance? For example say you set up a standard Si-diode and a 100Ohm…
Maitiu
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How to draw the curve of the charge Qc

How to draw the curve of the charge Qc as a function of time for an RC circuit, whose capacitor is initially charged and without source, when closing the tap
Blanca Prieto
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How to account for additional series resistance of SMU for characterising solar cells?

I have been building a source-measure unit based on a design similar to the DC2591A. I unfortunately cannot share the design, but largely it replicates the DC2591A using slightly different components here and there. The one major change is that I am…
Tiaan Stals
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V-I Tester (aka ASA or Octopus or curve tracer)

I want to build a simple V-I tester and based on this article (or this) I did this easy circuit: R1 = 560Ω R2 = 100Ω R3 = 1kΩ where R1 and R2 is a voltage divider to set the \$V_{(DUT+V_{R_3})}=1VAC\$ and R3 limit the current in the Device Under…
Antonio
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Doesn't a curve tracer harm modern circuits?

I've read about a thing called a "curve tracer" that you can use to compare known good circuits with bad circuits. It consists of an AC voltage with a resistor that sweeps from -5 to +5V (or similar) and reads the voltage and current going to the…
Fusseldieb
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How to work out this implementation of chua's diode?

The author of a book claims that this is the implementation of Chua's diode by [Kennedy, 1992], although I cannot find this article. My question here is, how does this circuit work? For me, the diagram is a terrible mess. Note: The circuit shown…
Jethro
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