Multiplexer

A multiplexer, also known as a data selector, is a combinational circuit that selects one of many input signals and forwards it to a single output line. It is commonly used in digital systems to route data from multiple sources to a single destination.

Function of a Multiplexer

The function of a multiplexer is to select one of the input lines and connect it to the output line based on the select inputs. The number of select inputs determines the number of input lines a multiplexer can have. For example, a 2-input multiplexer has one select input and two data inputs, while a 4-input multiplexer has two select inputs and four data inputs.

Output Dependency

The output of a multiplexer depends on its select inputs. The select inputs determine which data input is connected to the output. When the select inputs change, the output of the multiplexer may also change.

Select Inputs

The select inputs of a multiplexer are used to control which data input is selected. The select inputs are binary inputs, meaning they can have two possible values: 0 and 1. The number of select inputs determines the number of data inputs that can be selected.

Example

Let's consider a 2-input multiplexer with inputs A and B, and a select input S. The output of the multiplexer is denoted as Y.

- When S = 0, the data input A is selected and connected to the output Y.
- When S = 1, the data input B is selected and connected to the output Y.

So, the output of the multiplexer depends on the select input S. If S = 0, the output is based on input A, and if S = 1, the output is based on input B.

Conclusion

In conclusion, the output of a multiplexer depends on its select inputs. The select inputs control which data input is selected and connected to the output. The select inputs are binary inputs, and their values determine the output of the multiplexer. Thus, the correct answer is option B - select inputs.