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Glossary: I
Glossary: I
IBIS
IBIS (I/O Buffer Information Specification) is a standard
for electronic behavioral specifications of integrated circuit input/output
analog characteristics. The core of an IBIS model is a table of current
versus voltage and I/O switching timing information. Xilinx IBIS models
contain tables for typical, slow/MIN (weak transistors, high temperature,
low voltage) and fast/MAX (strong transistors, low temperature, high
voltage) process corners. IBIS models are derived from SPICE simulation
results and/or lab measurements. The benefit for IBIS model user is
fast and accurate simulation while preserving IC vendors intellectual
property (information about circuit and process details).
IC (Integrated Circuit)
A device in which components such as resistors, capacitors,
diodes, and transistors are formed on the surface of a single piece
of semiconductor.
ICR (In-Circuit Reconfigurable)
An SRAM-based, or similar component which can be dynamically
reprogrammed on-the-fly while remaining resident in the system.
Impedance
The resistance to the flow of current caused by resistive,
capacitive, or inductive devices (or undesired elements) in a circuit.
Impedance Matching
Function of ensuring that the impedance of the transmitter,
the receiver, and the transmission line are identical. Mismatched impedances
could result in signal reflections, ringing, overshoot, undershoot,
and stairstep waveforms.
In-Circuit Reconfigurable (ICR)
An SRAM-based, or similar component which can be dynamically
reprogrammed on-the-fly while remaining resident in the system.
Inductance
A property of a conductor that allows is to store
energy in a magnetic field which is induced by a current flowing through
it. Inductance is measured in units of Henries (the base unit is a Henry).
Insertion Loss
Insertion Loss (dB) is defined as the drop in power
as a signal enters an RF component. This value not only includes the
reflected incoming signal, but also the attenuation of the component.
In-System Programmable (ISP)
An E2-based, FLASH-based, or similar component which
can be reprogrammed while remaining resident on the circuit board.
Integrated Circuit (IC)
A device in which components such as resistors, capacitors,
diodes, and transistors are formed on the surface of a single piece
of semiconductor.
Ion
A particle formed when an electron is added to, or
subtracted from, a neutral atom or group of atoms.
Ion Implantation
A process in which beams of ions are directed at a
semiconductor to alter its type and conductivity in certain regions.
Isolation
The ratio (expressed in dB) of the power level at
one port compared to the resulting power level of the output port.
ISP (In-System Programmable)
An E2-based, FLASH-based, or similar component which
can be reprogrammed while remaining resident on the circuit board.
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