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OR Gate (Inclusive OR) & NAND Gate (Bubbled OR) | GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE) PDF Download

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FAQs on OR Gate (Inclusive OR) & NAND Gate (Bubbled OR) - GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE)

1. What is an OR gate and how does it work?
Ans. An OR gate, also known as an Inclusive OR gate, is a digital logic gate that takes two or more input signals and produces an output signal if any of the inputs are high. It follows the logic that if at least one of the inputs is true (high), the output will be true (high). The output of an OR gate is only false (low) when all the inputs are false (low).
2. What is a NAND gate and how does it work?
Ans. A NAND gate, also known as a Bubbled OR gate, is a digital logic gate that is essentially an inverted OR gate. It takes two or more input signals and produces an output signal that is the logical negation of the OR gate output. This means that if any of the inputs are high, the output will be low. Only when all the inputs are low, the output will be high.
3. How can an OR gate be used in digital circuits?
Ans. OR gates are commonly used in digital circuits to combine multiple input signals and create a single output signal. They are used in various applications such as logic gates, arithmetic circuits, and memory units. OR gates are particularly useful when you want the output to be true if any of the inputs are true.
4. What are the advantages of using NAND gates instead of OR gates?
Ans. Using NAND gates instead of OR gates has several advantages. Firstly, NAND gates are considered universal gates, which means that any logical function can be implemented using NAND gates alone. This reduces the number of different gate types needed in a circuit. Secondly, NAND gates are easier to fabricate in integrated circuits, making them more cost-effective. Lastly, NAND gates have a built-in inverter, which simplifies the circuit design.
5. Can an OR gate be used as a universal gate like a NAND gate?
Ans. No, an OR gate cannot be used as a universal gate like a NAND gate. While NAND gates can be used to implement any logical function, OR gates cannot. An OR gate lacks the ability to perform the logical negation operation, which is crucial for implementing certain functions. Therefore, OR gates are not considered universal gates.
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