cathode interface impedance

cathode interface impedance

[¦kath‚ōd ¦in·tər‚fās im′pēd·əns]
(electronics)
The impedance between the cathode base and coating in an electron tube, due to a high-resistivity layer or a poor mechanical bond. Also known as layer impedance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.