An embedded system is a controller programmed and controlled by a real time operating system (RTOS) with a dedicated function within a larger mechanical or electrical system, often with real time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts. Embedded systems control many devices in common use today.Negative resistance
In electronics, negative resistance (NR) is a property of some electrical circuits and devices in which an increase in voltage across the device's terminals results in a decrease in electric current through it.. This is in contrast to an ordinary resistor in which an increase of applied voltage causes a proportional increase in current due to Ohm's law, resulting in a positive resistance.Peer Reviewed Journal IJERA
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research ..Full text of "NEW" Internet Archive
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electronics analog multipliers wikibooks open books for an open Gallery
multiplier circuit diagram