"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"
"I" to Inc, "Ind" to Inf, "Inp" to Int, "Inv" to Iz
I2C. Originally designed to be a battery control interface, now used in micro-controller based [uP] professional, consumer and telecommunications control, diagnostic and power management buses. The I2C bus uses a bi-directional Serial Clock Line [SCL] and Serial Data Lines [SDA]. Three speed modes are specified: Standard; 100kbps [Bits per Second], Fast mode; 400kbps, High speed mode 3.4Mbps. I2C is short for Inter-IC.
I2R LOSS. Refer to Copper Losses.
IC. See Integrated Circuit.
IC SYNCHROS. Obsolete, synchros with reverse rotation and limited torque capabilities.
IDE. Integrated Drive Electronics (Advanced Technology Attachment). A series of standards released between 1999 and 2005 which defined the electrical and mechanical interfaces between a personal computer's mother board and a Hard Disk Drive. Maximum bus speed of the IDE bus is 133MBps over an 18 inch Parallel cable. The IDE interface is also known as the ATA interface. The ATA interface was rendered obsolete by the introduction of the Serial ATA [SATA] interface in 2005.
IDEMPOTENT LAW. In Boolean algebra, combining a quantity with itself either by logical addition or
logical multiplication will result in a logical sum or product that is the equivalent of the quantity (for
example, A + A = A; A • A = A).
IDENTITY LAW. In Boolean algebra, the law which states that any expression is equal to itself.
IDLE-CHANNEL NOISE. Noise that is present in a communications channel when no signals are applied. The channel conditions and terminations must be stated for idle-channel noise measurements to be meaningful.
IDLER FREQUENCY. In a parametric amplifier, the difference between the input signal and the pump
signal frequency. Also called the LOWER-SIDEBAND FREQUENCY.
IEEE-1284. A personal Computer interface that defined a parallel printer bus specification at 1MBps. IEEE-1284 defines a Point-To-Point asynchronous bi-directional interface. Devices may be either 1284 compatible {the older parallel port devices} or 1284 compliant. The maximum length for a printer cable is 25 feet, 32 feet maximum. Centronics parallel cables run out to 12 feet. The IEEE1284 cable replaced the 'Centronics' cable which is obsolete.
IF AMPLIFIER. Usually a narrow-bandwidth IF amplifier that is tuned to one of the output frequencies
produced by the mixer.
IGFET. Any field-effect transistor that has an insulated gate. Also see FET manufacturers.
IMAGE FREQUENCY. An undesired frequency capable of producing the desired frequency through
heterodyning.
IMPEDANCE. The total opposition offered to the flow of an alternating current. It may consist of any
combination of resistance, inductive reactance, and capacitive reactance. The symbol for impedance is
Z.
IMPLOSION. The inward bursting of a CRT because of high vacuum [Definition of CRT]. The opposite of explosion.
IMPULSE WAVEFORM. A short duration pulse. The pulse duration is defined from the peak duration to 50 percent of peak.
Impulse Duration
INCIDENT WAVE. The wave that strikes the surface of a medium. The wave that travels from the sending end to the receiving end of a transmission line.
IN-CIRCUIT METER. A meter permanently installed in a circuit; used to monitor circuit operation.
INCOHERENT. Refers to radiation on a broad band of frequencies.
Next set of "I" Terms and definitions
