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What are Logic Gates? State De-Morgan’s Law of Boolean Algebra.

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November 2nd, 2012 13:59
in Fundamentals of Information Technology by sheetal_101 (Baltimore International College (MD), Mechanics)

What are Logic Gates? State De-Morgan’s Law of Boolean Algebra.

Can some one briefly explain the concept of Logic Gate. Also Stater the De-Morgans Law in Boolean Algebra?

6 Answers
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November 5th, 2012 09:24
ekasha (Eastern Illinois University (IL), Chemistry)
"A logic gate is an elementary building block of a digital circuit. Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels. The logic state of a terminal can, and generally does, change often, as the circuit processes data. In most logic gates, the low state is approximately zero volts (0 V), while the high state is approximately five volts positive (+5 V). There are seven basic logic gates : AND, OR, XOR, NOT, NAND, NOR, and XNOR. The AND gate is so named because, if 0 is called ""false"" and 1 is called ""true,"" the gate acts in the same way as the logical ""and"" operator. The output is ""true"" when both inputs are ""true."" Otherwise, the output is ""false."" The OR gate gets its name from the fact that it behaves after the fashion of the logical inclusive ""or."" The output is ""true"" if either or both of the inputs are ""true."" If both inputs are ""false,"" then the output is ""false."" The XOR (exclusive-OR) gate acts in the same way as the logical ""either/or."" The output is ""true"" if either, but not both, of the inputs are ""true."" The output is ""false"" if both inputs are ""false"" or if both inputs are ""true."" Another way of looking at this circuit is to observe that the output is 1 if the inputs are different, but 0 if the inputs are the same. A logical inverter, sometimes called a NOT gate to differentiate it from other types of electronic inverter devices, has only one input. It reverses the logic state. The NAND gate operates as an AND gate followed by a NOT gate. It acts in the manner of the logical operation ""and"" followed by negation. The output is ""false"" if both inputs are ""true."" Otherwise, the output is ""true."" The NOR gate is a combination OR gate followed by an inverter. Its output is ""true"" if both inputs are ""false."" Otherwise, the output is ""false."" The XNOR (exclusive-NOR) gate is a combination XOR gate followed by an inverter. Its output is ""true"" if the inputs are the same, and ""false"" if the inputs are different. Source: http://in.docsity.com/en-docs/Fundamentals_of_Information_Technology__Lecture_Notes__Elveera_Miranda"

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January 28th, 2013 05:50
devkinandan (Alagappa University, Investment management)
A gate is definitely an idealised or bodily device utilizing the Boolean purpose, which is, the idea does a logical surgery one or even more judgement advices in addition to creates a individual logical system end result. According to the wording, the word whitethorn make reference to a great logic gate, the one which possesses in particular actually zero rise time and endless enthusiast-available, or it might consider A not for-suitable actual device.

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January 28th, 2013 15:14
dhritiman (Chaudhary Charan Singh Haryana Agricultural University, Electrical Engineering)
Logical system throughways tend to be mostly put in place employing diodes as well as transistors being electric knobs, but sometimes be built using electro-magnetic relays (pass on common sense), fluidic reasoning, air-driven reasoning, optics, molecules, or maybe mechanical factors. Along with amplification, reason gates might be cascaded in the same manner that will Boolean characteristics is usually created, permitting the building of a physical style of each one of Boolean logic, and therefore, every one of the calculations along with math concepts that could be referred to along with Boolean common sense.

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January 29th, 2013 07:10
aruni (English and Foreign Languages University, English literature)
Logical system tour contain these devices seeing that multiplexers, signs up, maths reason models (ALUs), and store, completely upwards as a result of concluded microprocessors, which may comprise in excess of c mil checkpoints. Used, the throughways are manufactured from industry-impact transistors (FETs), especially MOSFETs (metallic–oxide–semiconductor device field-result transistors).

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January 30th, 2013 13:06
sangawar (Alliance University, Mathematics)
"Take into account that computer systems work with a power flowing where a hollywood is regarded single as well as a low voltage is regarded as any 0. Using most of these ups and downs, facts tend to be manifested. Digital circuits has to be made to keep in line most of these bad and good pulses into meaningful reason. Logical system entrance will be the play blocks connected with digital build. Mixtures of logic entrance form build beautifully made with specific jobs at heart. For example, logical system checkpoints are generally put together in order to create tour to provide binary program volumes (adders), arranged and also readjust bits of storage (sandals), multiplex multiple inputs, and so on."

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January 31th, 2013 05:36
sanjoy (Allahabad University, Materials science)
There are 2 sets of emblems for primary logic checkpoints in common use, the two described inwards ANSI/IEEE An std ninety-one-1984 and complement ANSI/IEEE An std 91a-1991. The actual "distinctive design" established, based on traditional schematics, is employed for uncomplicated images, and takes by Milliliter-A sexually transmitted disease-806 from the fifties along with sixties. It is sometimes unofficially termed "army", highlighting their foundation. This "orthogonal design" hardened, determined by IEC 60617-twelve and other beginning sector criteria, possesses rectangular outlines for many kinds of gateway and also enables counsel of the a lot broader choice of units when compared with may be possible with the classic emblems.

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