Operating voltage ranges between 4.75 V to 5.25 V The functional characteristics of 74LS00 are: So, this Boolean expression is derived using the Negated And logic gate. When the inputs are considered as X and Y, then for an AND gate, the desired output is X.Y. The below section explains on NAND gate to derive basic gates. This makes it more flexible that any basic logic gate can be derived using a NAND gate.
Deriving Basic Gates Using NAND Logic GateĪs it is already discussed that NOT AND gate is a universal gate. As the collector also has a connection with output, the LED display gets 0V i.e. Whereas Ty is connected to the ground, the potential variation in between the collector end of Tx and emitter end of Ty becomes ‘0’. As both the inputs are at a HIGH state, this establishes a direct connection between the collector end of Tx and the emitter end of Ty. Here, the inputs X and Y are at logic HIGH this means the power supply directly reaches to collector end through 2k Ohm resistor. This makes the output as logic HIGH which is similar to case 2. When the X input is at logic HIGH and Y input is at logic LOW, the switch for Tx moves to ON and Ty becomes OFF. Because of this, the power supply that passes to the collector end reaches to output making the LED display ON i.e. Whereas, the input at the collector end for Ty is 0 which means there exists no connection in between the emitter and collector ends of Tx. When the Y input is at logic HIGH, the base end of Ty establishes a connection between its emitter and collector ends. As the collector end is even connected with LED, this power supply directly reaches to LED and the LED glows making the output as HIGH. Because of this, when there is a power supply across the circuit, the current will not pass to the emitter end of Tx and it passes only to the collector end of Tx. When both the inputs are LOW, then the two transistors Tx and Ty operating as the switch do not permit for connection between emitter and collector ends. Please refer to this link to know more about NAND Gate MCQs To know the exact functionality of the Negated And logic gate using a transistor, we need to analyze all four combinations of inputs. On the other hand, the base ends of both Tx and Ty are connected to inputs X and Y through 10k ohm resistors correspondingly. Then the emitter end of Ty is connected to the ground and this completes the circuit connection. And today, this article focuses on explaining NAND gate definition, circuit, truth table, its applications, and advantages. Sheffer and the functionality of NAND is termed as Sheffer stroke.
Then, the initial proof of publication happened in 1913 by Henry M. Along with these, we have NAND gate and NOR gates which are termed Universal Logic Gates.Ĭharles Peirce demonstrated that either NOR or NAND logic gates are enough to reproduce the operation of other logic gates, but his demonstration was left unpublished till 1933. The very fundamental type of logic gates is AND, OR, and NOT gates. These logic gates are basically designed using transistors, relay logics, diodes, and many other mechanical elements. As per this context, the term can be referred to as an ideal logic gate or non-ideal physical device.
We all know that logic gate is the idealized computational approach for the implementation of a Boolean function which is either performed on a single or more number of inputs thus generating single output.
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