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How many possible combination of inputs are there for a 2-input gate?
four possibilities
As was mentioned previously in this chapter, a two input gate has four possibilities (00, 01, 10, and 11). A three-input gate has eight possibilities (000, 001, 010, 011, 100, 101, 110, and 111) for input states.
How do you make 3 input AND gate using 2-input AND gate?
Start by building the 2-input AND block from the last experiment, but plug the output of that into the input of another AND. Then add an Input Block to the second AND’s second input. Complete the circuit by adding a Power Block to the output of the second AND.
How many inputs can A and Gate have?
AND Gate AND gate produces an output as 1, when all its inputs are 1; otherwise the output is 0. This gate can have minimum 2 inputs but output is always one.
How to build an AND gate using NPN transistors?
The list of components required to build an AND gate using an NPN transistor are listed as follows: Two NPN transistors. (You can also use PNP transistor if available) Two 10KΩ resistors & one 4-5KΩ resistor. One LED (Light Emitting Diode) to check the output. A Breadboard. A +5V Power supply. Two PUSH buttons.
What kind of gate has two inputs and one output?
AND logic gate is a D-shaped logic gate with two inputs and one single output, where the D shape in between the input and output is the logic circuit. The relation between input and output values can be explained using the AND Gate Truth Table shown below.
What happens when you replace a NPN gate with a PNP gate?
When we replace the NPN transistors of the Nand gate with PNP transistors, we get an Or gate: Replacing one of the NPN transistors of the Nand gate with a PNP transistor moves the output 0 to a different combination of inputs as follows:
What should resistance be for PNP logic gates?
I could not find any website with information about logic gates with PNP transistors; for our purposes, the following circuits work fine. As a general note, when using a voltage of around 5.5-5v, the resistance at the base of the transistor should be about 10kΩ, while the resistance of the emitter or collector should be about 1-5kΩ.