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VLSI Definitions
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Q
There are 7 entries in the glossary.
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Term Definition
QA (Quality Assurance)The practice of checking hardware, software, or systems for defects, identifying such defects, and then checking to make sure that such defects are corrected when future revisions of software or hardware are ready for testing.
 
QPSKQuadrature Phase Shift Keying is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts i:e 0, 90, 180, or 270 degrees.
 
Quality factorA measure of the sharpness of resonance of an electronic / electromechanical resonator component. A device with a High Q factor has a sharp, large magnitude, well defined resonance. It is defined as the ratio of the reactance to the effective series resistance of a component.
 
Quantum devicesemiconductor device which operation is based on quantum effects.
 
Quantum wellsemiconductor heterostructure fabricated to implement quantum effects in electronic and photonic applications; typically an ultra-thin layer of narrower bandgap semiconductor is sandwiched between two layers of larger bandgap semiconductor.
 
Quasi stableA flip-flop has two well-defined stable conditions, \'1\' and \'0\'. When there is a violation in setup or hold time of Flip-Flop, it enters into a state called ‘metastable’ or ‘quasi stable’ state, where the output of Flip-Flop is unpredictable. This is so called metastability.
 
QueueA data construct that is first-in, first-out (FIFO).
 


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