Friday, 29 March 2024, 8:17 AM
Site: edulabs.org academy
Course: Activity Examples (Activity Examples)
Glossary: Electronics (Mike Jaroch)
D
DOPINGThe process of adding impurities to semiconductor crystals to increase the number of free charges that can be moved by an external, applied voltage. Doping produces N-type or P-type material [7] [14]. |
DOPPLER EFFECT(1) The apparent change in frequency or pitch when a sound source moves either toward or away from a listener [10]. (2) In radar, the change in frequency of a received signal caused by the relative motion between the radar and the target [18]. |
DOPPLER FREQUENCYThe difference between transmitted and reflected frequencies; caused by the Doppler effect [18]. |
DOUBLE NEGATIVE LAWIn Boolean algebra, the law which states that the complement of a complement is the equivalent of the original term [13]. |
DOUBLE RECEIVERA fine and coarse synchro receiver enclosed in a common housing with a two- shaft output (one shaft inside the other) [15]. |
DOUBLE-MODINGIn a transmitter output tube, the abrupt and random change from one frequency to another [18]. |
DOUBLETAnother name for the dipole antenna [10]. |
DOUBLING UPThis is a type of two-equipment installation where one unit can be substituted for another in the event of failure [17]. |
DOWN LINKThe frequency used to transmit an amplified signal from a satellite or other craft back to earth [17]. |
DRIFT SPACEIn an electron, a region free of external fields in which relative electron position depends on velocity [11]. |