VLSI Definitions | |
| Definitions of the terms that are often used in Chip design world. Please help us to improve the list. You can add VLSI terms and its definitions with out registering in the site. | |
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| There are 257 entries in the glossary. | |
| Pages: «1 2 3 4 5 6 7 8 9 » | |
| Term | Definition |
| Path delay | The time required for a signal to traverse through a wire between two circuit components. |
| Photo-mask | The photographic film (glass plate) which contains the masking pattern required for a particular wafer processing step (see Mask). |
| Photonics | The science and technology of generating, manipulating, transmitting, and detecting light. It is a field that encompasses optics, quantum optics, lasers, optoelectronics, imaging, optical information processing, materials science, and their applications. |
| PIC | Integrated circuits that include active and passive photonic devices on the same chip. |
| Plasma Vapor Deposition | A SEMICON process used to deposit material onto a wafer by ionizing a gas plasma (typically via microwave radiation). In PVD chemical reactions occur in the gas/plasma phase, as opposed to on the surface of the wafer in CVD. |
| pMOS | A p-channel metal-oxide semiconductor transistor is one in which p-type dopants are used in the gate region. A negative voltage on the gate turns the device on. |
| Printed Circuit Board | An layer of nonconducting material sandwiched between layers of copper interconnecting patterns onto which are soldered integrated circuit packages and other electronic components. |
| Process stability | The degree to which a process undergoes change to achieve acceptable yield. |
| Proof-of-design part | A fabricated ASIC used to verify ASIC functionality before fabricating engineering and flight parts. |
| Prototyping | The implementation of a microsystem, component, or system to verify functionality or show proof-of-concept. |
| PSK | Phase-shift keying is a modulation technique in which the phase of the carrier conveys the input signal\'s information. |
| 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. |
| QPSK | Quadrature 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 factor | A 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 device | semiconductor device which operation is based on quantum effects. |
| Quantum well | semiconductor 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 stable | A 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. |
| Queue | A data construct that is first-in, first-out (FIFO). |
| Register transfer level | A circuit modeling level based on the flow of data from register to register. |
| Resistor | A nozzle that restricts flow of electricity giving control over the current at any poiint. Ex: volume control dial on a TV..adjusting volume adjusts a resistor which reduces flow of current to the speaker to decrease the noise level. |
| RTOS | A specialized operating system that guarantees performance levels for time-critical applications. |
| Scan path | One or more serial shift register chains through which test signals are applied and test results are observed. The scan path registers may also be used in the normal mode of the circuit for status registers, data storage, etc. |
| Schematic capture | The act of entering a circuit schematic into a graphical CAD tool. |
| Semiconductor | A material that is neither a good conductor of electricity (like copper) nor a good insulator (like rubber). The most common semiconductor materials are silicon and germanium. Computer chips, both for CPU and memory, are composed of semiconductor materials. Semiconductors make it possible to miniaturize electronic components, such as transistors. Not only does miniaturization mean that the components take up less space, it also means that they are faster and require less energy. |
| semiconductor device | essentially any homogenous or multilayer piece of semiconductor material which is processed in such way that it can perform in the or photonic (e.g. LED, laser) function. |
| semiconductor laser | Light emitting semiconductor device which in contrast to simple light emitting diode (LED) generates very sharp emission lines and allows modulation bandwidth in a gigahertz range. |
| Serial Interface | A serial interface is one in which data is sent in a single stream of bits, usually on a single wire-plus-ground, wire-pair, or single wireless channel. |
| Silicon on Insulator | A type of fabrication process where silicon is deposited on an insulating substrate. The process layers from top to bottom are: Semiconductor, insulator. |
| Simulation | The use of a CAD tool that mimics the behaviour of the actual circuit through a collection of sub-circuit models enabling designers to test, verify, and debug circuits before layout and fabrication. |
| Slicing | Term refers to the process of cutting of the single-crystal semiconductor into wafers; high precision diamond blades are used. |
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