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Describing Logic Circuits
A small circle on the output of a logic gate is used to represent the:
Comparator operation.
OR operation.
NOT operation.
AND operation.
Correct Answer:
NOT operation.
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Describing Logic Circuits
The complement of 1 is 0.
The Boolean expression for a three-input AND gate is X = ABC.
The inputs to an AND gate are: A = 1, B = 0, C = 1. The output will be LOW.
In a text-based language, the circuit being described must be given a name.
A LOW placed on the input of an inverter will produce a HIGH output.
A minimum of three universal NOR gates would be required to perform the logical operation of a 2-input AND gate.
In an expression containing both AND and OR operations, the AND operations are performed first (unless parentheses indicate otherwise).
The effect of an inverted output being connected to the inverting input of another gate is to effectively eliminate one of the inversions, resulting in a single inversion.
The timing diagram for a two-input NAND gate is shown below. The gate is working correctly.
A NAND gate consists of an AND gate and an OR gate connected in series with each other.
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