- OR Operation Definition: OR Operation is a logical operation used in Boolean algebra and electronics.
- Truth Table: The OR Operation truth table shows that the output is 1 if either or both inputs are 1.
- Boolean Algebra Symbol: The plus sign (+) is used to represent the OR Operation in Boolean algebra.
- Digital Circuit Application: In digital circuits, the OR Operation is like having two parallel switches where the signal flows if either switch is closed.
- Practical Understanding: Learning about OR Operation helps in understanding the workings of certain digital circuits and Integrated Circuits (ICs).
It is one of the important logical operation useful in Boolean algebra and other electronics devices. In real life there are several Integrated Circuits (IC) where the concept of OR Operation or Boolean OR operation is used. Though in these types of circuits logical gates are used but still input and are dependent on the same logic. Thus by studying these operations we may gather concepts on those circuits. The Logical OR operation is based on some basic concepts which can be understand by the truth table given below. Before going to the OR operation truth table we should know the sign used in this type of operation. In Boolean OR operation the sign used is (+). Now let follow the inputs and outputs of the troth table.
In this truth table you can see that there are two inputs and a single output. When the input of A and B is 0 the output is also 0. When the input of A = 0 and B = 1 the output is 1, when the value of A = 1 and B = 0 in the input then the respective output is also 1 and at last when A = 1 and B = 1 in input the Logical OR operation output is also 1.
In the OR Operation, the output is 0 only when both inputs are 0. If either input is 1, the output is 1.
Let’s apply this logic to digital circuits. Here, 1 means a signal flow, and 0 means no signal flow. This concept will become clearer with the switch circuit example in Fig. 1.
In the figure, two switches are connected in parallel. Remember, 1 means signal flow, and 0 means no signal flow. If either switch is closed, there will be an output. If both switches are open, there is no output. This logic is the same as the OR Operation. If S1 = 0 and S2 = 0, the output is 0. But if either S1 = 1 or S2 = 1, or both are 1, there will be a signal pulse, similar to the OR Operation.
