Digital Logic OR Gate

by | Oct 10, 2018 | Digital Logic Gates, Logic Gate | 97 comments



The gate may be a digital gate that implements logical disjunction, it behaves in keeping with the reality table to the proper. The gate gets its name from the very fact that it behaves once the style of the logical comprehensive “or.” The output is “High” if either or each of the inputs square measure “High.” If each input square measure “Low,” then the output is “Low.”IC is that the gate, which has four freelance two-input OR gates.

 

OR-Gate-Symbol

Fig: OR Gate Symbol

 

This a logic gate is properly delineated as AN “Inclusive OR gate” as a result of the output is true once each of its inputs square measure true (HIGH). Then we are able to outline the operation of a



2-input logic gate. The logic or Boolean expression is given for a digital logic OR gate is that for Logical Addition that is denoted by giving the North American country the Boolean expression of A + B = Y. The Logic gate could be a style of the digital logic circuit. whose output goes HIGH to a logic level one only if one or a lot of its inputs square measure HIGH.

Logic-OR-Gate- truth-table

    Fig: OR Gate 2 Input Truth Table

Logic OR Gates area unit offered exploitation digital circuits to provide the specified logical perform and is given a logo whose form represents the logic operation of the OR circuit. a straightforward 2-input comprehensive OR circuit connected along as shown below with the inputs connected on to the junction bases. Either junction transistor should be saturated “ON” for Associate in Nursing output.

Fig: OR Gate 3 input

 

In addition to the quality 2-input OR gate, 3- and 4-input OR gates are on the market. within the CMOS series, There area unit several offshoots of the initial 7432 OR gate, all having constant pinout however totally different internal design, permitting them to control in numerous voltage ranges or at higher speeds.



OR-Gate-Diagram

Fig: OR Gate Diagram

 

The OR circuit may be a digital gate that performs a logical conjunction supported the mixtures of its inputs. The output of the OR circuit is true only if one or a lot of inputs area unit true. If all the i/p of the gate area unit false, then solely the output of the OR circuit is fake.

 

OR Gate Tutorial watch the video

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