"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"
Previous set of "F" terms.
FRONT-TO-BACK RATIO. The ratio of the energy radiated in the principal direction compared to the
energy radiated in the opposite direction.
FUEL CELL. A fuel cell converts energy generated by chemical reaction into electrical energy. Its function is similar to a battery, except that the chemicals generally are supplied from outside the cell.
FULL-DUPLEX CIRCUIT. A circuit that permits
simultaneous transmission in both directions. A number of interface buses use a Full-Duplex Circuits, Communication over Gigabit Ethernet is one example.
FULL-WAVE RECTIFIER. A circuit that uses both positive and negative alternations in an alternating
current to produce direct current. There are two general circuit configurations; A two diode circuit that requires a center tapped transformer and a four diode approach that does not require a center tapped transformer. [Full-Wave Rectifier Circuit Schematic]
Full-Wave Rectifier Circuit
FULL-WAVE VOLTAGE DOUBLER. Consists of two half-wave voltage rectifiers and is used to reduce the output ripple amplitude.
FUNCTION. A specific purpose of an entity; its characteristic action.
FUNDAMENTAL FREQUENCY. The basic frequency or first harmonic frequency.
Fungus-inert material. A material which, in all modified states and grades, is not a nutrient to fungi.
FUSE. A device that has as its critical component a metal wire or strip that will melt when heated by a prescribed (design) amperage, creating an open in the circuit of which it is a part, thereby protecting the circuit from an over current condition. Note on operating AC Fuses in DC circuits; Maximum Fuse Voltage. [Fuse Manufacturers]
Axial Leaded Fuse
FUSED-ALLOY JUNCTION. See ALLOYED-JUNCTION.
FUSED HOLDER. A device used to hold a fuse. The shape of the fuse holder used is determined by the style of fuse being used. Two common style of fuse holders include Block Fuse Holders, and Panel Mount Fuse Holders. Refer here for Manufacturers of Fuse Holders
FUTUREBUS. IEEE-896. Futurebus is a back-plane bus standard that defines both the Physical and Electrical layers for the interface. The follow-on specification was called Futurebus+, which was an upgrade.
