Common questions

Which logic gates are universal?

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Which logic gates are universal?

The NAND and NOR gates are universal gates. In practice, this is advantageous since NAND and NOR gates are economical and easier to fabricate and are the basic gates used in all IC digital logic families.

What is the relationship between logic gates and integrated circuits?

A logic gate is a small transistor circuit, basically a type of amplifier, which is implemented in different forms within an integrated circuit. Each type of gate has one or more (most often two) inputs and one output.

Why Universal gates are called universal?

∴ NAND and NOR gates are called universal gates because they can be combined to produce any of the other gates like OR, AND, and NOT gates.

Can op amp perform logical operations?

If the OP meant that if digital logic gates can be designed by descrete opamp ICs, then also the answer is yes. The opamp was made to handle all values of analog voltages, it can certainly handle two. But we will have to designate two unique voltages as logic 1 and a 0, and leave room for some noise margin.

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How many universal gates are there?

We have two universal gates – NAND gate and NOR gate. Note: The NAND gate is the abbreviation for Not AND and the NOR gate is the abbreviation for Not OR. In digital circuits we mostly use the NANA and the NOR gate to perform the operation of all the gates because these gates are economical and easier to fabricate.

What are the three universal logic gates?

The NAND and NOR gates are universal gates. In practice, this is advantageous since NAND and NOR gates are economical and easier to fabricate and are the basic gates used in all IC digital logic families. There are many types of logic gates out there ; AND , OR , NAND , NOR , XOR etc.

What is the difference between a logic gate and a logic circuit?

Logic circuits are also called logic networks, are structures which are built up from certain elementary circuits called logic gates. Each logic circuit may be viewed as a machine L which contains one or more input devices and exactly one output device.

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Why logic gates are called logic gates?

Logic gates are devices that implement Boolean functions, i.e. it does a logic operation on one or more bits of input and gives a bit as an output. The relationship between the input and output is based on a certain logic. Hence logic gates are named as AND gate, OR gate, NOT gate, etc.

Which is not a universal logic gate?

Note that neither the Exclusive-OR gate or the Exclusive-NOR gate can be classed as a universal logic gate as they can not be used on their own or together to produce any other Boolean function.

Is op amp a logic gate?

Nope. A comparitor has a digital output, it can be a 1 or a 0. An op amp is a linear device.

Are all op amps the same?

If the type of feedback is not specified, it’s a pretty safe guess that it is a voltage feedback amplifier. 1 as if they have a single input, they will be standard two-input and one-output op amps. While they can be configured with inverting feedback or non-inverting feedback, I strongly suggest non-inverting feedback.

What are three universal logic gates?

What is the difference between a logic gate and a NAND?

So NAND (not AND) simply means that a NAND gate performs the opposite function to an AND gate. A logic gate is a small transistor circuit, basically a type of amplifier, which is implemented in different forms within an integrated circuit.

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Can we produce the fastest op amp logic gate?

Yes we can, and not just any old logic gate family, we can produce the fastest gates in existence! The technology is called ECL for Emitter coupled logic. No, it is not strictly an opamp, but it uses the core of an opamp; BJTs in the differential amplifier configuration.

What is the difference between a and a•B in logic gates?

A•B means A AND B but A•B means A NAND B The action of any of the gates can therefor be described by using its Boolean equation. For example, an AND gate gives an output of logic 1 when input A AND input B are at logic 1, but a NAND gate would give a logic 0 output for the same input conditions.

What is the inverting amplifier configuration for an operational amplifier?

One final point to note about the Inverting Amplifier configuration for an operational amplifier, if the two resistors are of equal value, Rin = Rƒ then the gain of the amplifier will be -1 producing a complementary form of the input voltage at its output as Vout = -Vin.