Also found in: Acronyms.
back bias[′bak ‚bī·əs]
Degenerative or regenerative voltage which is fed back to circuits before its originating point; usually applied to a control anode of a tube or other device.
Voltage applied to a grid of a tube (or tubes) or electrode of another device to reduce a condition which has been upset by some external cause.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.