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<title>Termination of a Transmission Line</title>
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<p>
This is a simple circuit showing various ways to terminate
<a href="http://en.wikipedia.org/wiki/Transmission_line">transmission
lines</a>. The <a href="http://en.wikipedia.org/wiki/Characteristic_impedance"
>characteristic impedance</a> of these lines is 75 ohms. The top line is properly
terminated, with a 75 ohm resistor at each end. As a result, the pulse travels across
and is absorbed at the right end. This is the most efficient way to terminate a line,
since it minimizes reflections that waste energy.
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The second line is terminated with a resistor that is too large, causing the wave
to be reflected, and absorbed at the other end (which is properly terminated).
The third line is terminated with a resistor that is too small, causing the wave
to be reflected negatively.
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The fourth line is terminated improperly at both ends, causing the wave to reflect
back and forth for a while.
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Next: <a href="e-tlmismatch.html">Mismatched transmission lines (Pulse)</a><p>
Previous: <a href="e-tlstand.html">Standing Wave on a Transmission Line</a><p>
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