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Q. Explain Read-only memory?
ROM is nonvolatile (because it maintains its contents even when its power is shut off) and is used to store data and programs that do not change during the operation of the system. The mask-programmed ROMs are read-only devices that are programmed for data storage during the manufacturing of the chip itself. These are generally less expensive devices for mass production. Character-font memory for laser printers is a good example. Programmable read-only memory (PROM) is a field-programmable memory that is fabricated by the manufacturer containing all 0s and is programmed irreversibly by the user by electrically changing appropriate 0s to 1s. PROMs are quite economical in small quantities. Erasable programmable read-only memory (EPROM) is nonvolatile and widely used in microprocessor systems for program storage. It can be erased by shining an ultraviolet light and reprogrammed if necessary. These are produced in lowtomoderate volumes.
Q. Explain AC voltage controllers? Common applications for these controllers are found in fan, pump, and crane drives. Figure shows three-phase symmetrical ac voltage-controlle
What are Macros? Macro is a group of instruction. The macro assembler makes the code in the program each time where the macro is called. Macros are described by MACRO & ENDM di
short circuit protection
A method used in advanced microprocessors where the microprocessor begins implementing a second instruction before the first has been done. That is, various instructions are in the
An abrupt silicon (n i = 10 10 cm -3 ) p-n junction consists of a p-type region containing 10 16 cm -3 acceptors and an n-type region containing 5 x 10 16 cm -3 donors. a)
what is an useful life time in bathtub curve?
state applications of split phase motor
Q. A three-phase balanced load draws 100 kW at 0.8 power factor lagging. In order to improve the supply power factor to 0.95 leading, a synchronous motor drawing 50 kWis connected
The goal of this project is to model a system and to design a controller for the system so that the closed-loop system performs satisfactorily.
Module of the rated currents - transformer: The transformer of the Face(Figure) 2 is a transformer of type Delta-Y (the neutral of Y is grounded). The rated output is of 1500
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