"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
The previous portion of the D listing;
"D" Terms
DRY-AIR SYSTEM. Provides dehumidified air for electronic equipment that is moisture critical.
DRY CELL. An electrical cell in which the electrolyte is not a liquid. In most dry cells the electrolyte is in
the form of a paste. [Battery Manufacturers]
D-Sub. Short for D Sub-miniature. A style of connector with the mating end shaped like the letter 'D'. Also refer to D-Sub reference data.
DUAL-GATE MOSFET. A two-gate MOSFET in which either gate can control the conductor
independently, a fact which makes this MOSFET very versatile.
DUAL IN-LINE PACKAGE (DIP). IC package having two parallel rows of performed leads. [IC Package Type Definitions]
Dual In-Line Package
DUCT. In interfacility cabling, a conduit, which may be direct-earth buried or encased in concrete, used to enclose communications or power cables.
DUCTILE. The propagation of radio waves within an atmospheric duct. Easily drawn out (as to form filaments or wires).
DUCTING. Trapping of an RF wave between two layers of the earth’s atmosphere or between an atmospheric layer and the earth.
DUMMY LOAD. A dissipative but non-radiating device that has the impedance characteristics of an antenna or transmission line. Also called ARTIFICIAL LOAD. More information on [Dummy Load]
DUPLEX CIRCUIT. A circuit that permits transmission in both directions. Example RS485 Duplex Schematic. Note that the two types of duplex operation include Full-Duplex [transmission in both directions at the same time], and Half-Duplex [transmission in both directions one at a time].
DUPLEXER. A radar device that switches the antenna from the transmitter to the receiver and vice versa. Refer to the separate Dictionary of Radar Terms.
DUTY CYCLE. In a transmitter, ratio of time on to time off.
DYNAMIC MICROPHONE. A device in which sound waves move a coil of fine wire that is mounted on the back of a diaphragm and located in the magnetic field of a permanent magnet.
DYNAMIC RAM. [DRAM] A type of Volatile memory. A direct accessible memory (RAM) where the information is usually stored in the form of charges in a capacitor, DRAM must be continually powered and periodically refreshed, hence the name dynamic. Also see Volatile Memory IC Vendors
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"E" Terms and definitions
