Short for programmable logic device, a generic term for an integrated circuit that can be programmed in a laboratory to perform complex functions. A PLD consists of arrays of AND and OR gates. A system designer implements a logic design with a device programmer that blows fuses on the PLD to control gate operation.
System designers can use development software that converts basic code into instructions a device programmer needs to implement a design.
PLD types can classified into the following groups
PROMs (Programmable Read Only Memory) – offer high speed and low cost for relatively small designs
PLAs (Programmable Logic Array) – offer flexible features for more complex designs
PAL/GALs (Programmable Array Logic/Generic Array Logic) – offer good flexibility and are faster and less expensive than PLAs
Short for polymer, or polymeric, light-emitting diode, a backlighting, illumination and display technology. Polymers are substances formed by a chemical reaction in which two or more molecules combine to form larger molecules. PLEDs are thin film displays that are created by sandwiching an undoped conjugated polymer between two proper electrodes at a short distance. The […]
Short for Product Lifecycle Management, it refers to a set of software tools used for mechanical design, analysis and manufacturing to support products from when they are first conceived through distribution and retirement. *PLM is assembled from various software programs, rather than purchased outright as a single commercial off-the-shelf product. Once assembled, a well-designed PLM […]
Short for phase-locked loop, an electronic circuit that controls an oscillator so that it maintains a constant phase angle (i.e., lock) on the frequency of an input, or reference, signal. A PLL ensures that a communication signal is locked on a specific frequency and can also be used to generate, modulate and demodulate a signal […]
Short for public land mobile network, a generic term for a mobile wireless network that is centrally operated and administrated by an organization and uses land-based radio frequency transmitters or base stations as network hubs. PLMNs can stand alone and interconnect with one another or connect to a fixed system such as the PSTN. Cellular […]
Short for Programming Language for Business, PL/B is an English-like high-level programming language that offers screen, file and character string manipulation. The PL/B source code will compile and run without changes across multiple platforms and it incorporates strong file access capabilities that distinguish it from other languages. PL/B is also multi-user friendly, as no additional […]