Share on Facebook Share on Twitter Email
Answers.com

Output impedance

 
Sci-Tech Dictionary: output impedance
Home > Library > Science > Sci-Tech Dictionary
(′au̇t′pu̇t im′pēd·əns)

(electronics) The impedance presented by a source to a load.

Search unanswered questions...

Enter a question here...
Search: All sources Community Q&A Reference topics

Electronics Dictionary: output impedance
Top
Home > Library > Science > Electronics Dictionary

Impedance measured across the output terminals of a device without a load connected.


Wikipedia: Output impedance
Top
Home > Library > Miscellaneous > Wikipedia

The output impedance is the impedance on the output of a circuit. This is sometimes also referred to as the internal resistance of the circuit.

The output impedance Z is measured by first measuring the voltage U across the output terminals of the circuit without a load, and then by measuring the voltage UL over a known load RL. Voltage division gives us

\ U_L = R_LI , I = \frac{U}{Z+R_L},
\ U_L = \frac{R_L}{Z+R_L}U.

Solve this for Z, and we get

\ Z = R_L \frac{U-U_L}{U_L}.

See also

External links


Stub icon This electronics-related article is a stub. You can help Wikipedia by expanding it.

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

 
 

 

Copyrights:

Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.  Read more
Electronics Dictionary. Copyright 2001 by Twysted Pair. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Output impedance".  Read more