"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 "E" definitions and terms.
ELEMENT. A substance, in chemistry, that cannot be divided into simpler substances by any means
ordinarily available. A constituent of a device that contributes directly to its operation (e.g., chip resistor, capacitor, diode, transistor, integrated circuit, surface acoustic wave (SAW), substrate, package, etc., incorporated into a device), is an element of the device. A part of an antenna that can be either an active radiator or a parasitic
radiator.
EMERGENCY POWER. Temporary source of limited electrical power used upon the loss of the normal
power source.
EMF (ELECTROMOTIVE FORCE). The force that causes electricity to flow between two points with
different electrical charges or when there is a difference of potential between the two points. The unit of
measurement is volts.
| EMITTER. The element in a transistor that emits current carriers (electrons or holes). [Transistor Definitions, Transistor Manufacturers]. Transistor graphic, Common Emitter Circuit, showing bias currents. |
 Emitter |
EMITTER-INJECTION MODULATOR. The transistor equivalent of the cathode modulator. The gain is varied by changing the voltage on the emitter.
ENAMEL. A synthetic compound of cellulose acetate (wood pulp and magnesium). Used to insulate wire in meters, relays, and motor windings.
ENCAPSULATED. Imbedded in solid material or enclosed in glass or metal.
ENCODE. To use a code to represent individual characters in a message. Here are a number of Encoding Terms.
ENCODER. A device used to encode a signal or character from one format to another. Example IC Encoder; 74HCT147, 10-to-4 line priority encoder. Encoder Schematics.
Also refer to Manufacturers of Optical Encoders, or Manufacturers of Linear Encoders.
END OF LIFE. A part or device is no longer being manufactured, however there may or may not be inventory still in stock or carried by a distributor. Also refer to Component Life Cycle Definition, or Obsolete Parts Distributors.
Energized. (alive, live) Electrically connected to a source of potential difference, or electrically charged so as to have a potential significantly different from that of earth in the vicinity.
ENERGY. The ability or capacity to do work.
EPHEMERIS. A table showing the pre-calculated position of a satellite at any given time.
Ep-Ip CURVE. The characteristic curve of an electron tube used to graphically depict the relationship between plate voltage (Ep) and plate current (Ip).
EPITAXIAL PROCESS. A method of depositing a thin, uniformly doped crystalline region (layer) on a substrate.
EPROM. EPROM. or an Erasable PROM [Programmable Read Only Memory]. Read more; EPROM Definition, Manufacturers of EPROMs.
EQUATORIAL ORBIT. An orbit that occurs when the plane of a satellite coincides with the plane of the earth at the equator.
EQUIVALENT RESISTANCE (Req). A resistance that represents the total ohmic values of a circuit component or group of circuit components. Usually drawn as a single resistor in a simplified circuit.
ERROR. Refer to the page covering Error Terms.
Next set of "E" Terms and Definitions
