AND GateThe AND gate plays an important role in the digital logic circuit. The output state of the AND gate will always be low when any of the inputs states is low. Simply, if any input value in the AND gate is set to 0, then it will always return low output(0). The logic or Boolean expression for the AND gate is the logical multiplication of inputs denoted by a full stop or a single dot as A.B=Y The value of Y will be true when both the inputs A and B are set to true. Types of Digital Logic AND GateThe AND gate is classified into three types based on the input it takes. These are the following types of AND gate: The 2input AND GateThis is the simple formation of the AND gate. In this type of AND gate, there are only two input values and an output value. There are 2^{2}=4 possible combinations of inputs. The truth table and logic design are given below: Logic Design Truth Table The 3input AND GateUnlike 2input AND gate, the 3input AND gate have three inputs. The Boolean expression of the logic AND gate is defined as the binary operation dot(.). The AND gate can be cascaded together to form any number of individual inputs. There are 2^{3}=8 possible combinations of inputs. The truth table and logic design is given below: Logic Design Truth Table The Multiinput AND GateIn digital electronics, we can form ninput AND gate also. If there are n inputs, then (N/2)+1 AND gates will be used. For example: If we have 6 inputs A, B, C. D, E, F, then 4 AND gates are used in the logic design of 6input AND gate. There is the following expression of the 6input AND gate: Y=(A.B).(C.D).(E.F) In simple words, it is expressed as: Y=A AND B AND C AND D AND E AND F Logic Design Truth Table
Next TopicOR Gate
