Demultiplexerĭemultiplexer means one to many. To learn more about Multiplexers, read this Multiplexer (MUX) and Multiplexing tutorial. This is just an introduction to the concept of Multiplexer. Transmission from the Computer System of a Satellite – Multiplexer can be used for the transmission of data signals from the computer system of a satellite or spacecraft to the ground system using the GPS (Global Positioning System) satellites.Computer Memory – Multiplexers are used to implement huge amount of memory into the computer, at the same time reduces the number of copper lines required to connect the memory to other parts of the computer circuit.In this way, multiple audio signals can be isolated and eventually, the desire audio signals reach the intended recipients. Telephone Network – In telephone network, multiple audio signals are integrated on a single line for transmission with the help of multiplexers.Multiplexer allow the process of transmitting different type of data such as audio, video at the same time using a single transmission line. The efficiency of communication system can be increased considerably using multiplexer. Communication System – Communication system is a set of system that enable communication like transmission system, relay and tributary station, and communication network.Following are some of the applications of multiplexers – Multiplexer are used in various fields where multiple data need to be transmitted using a single line. Example of 16-to-1 line multiplexer is IC 74150.Another example of 4-to-1 multiplexer is 45352 in which the output is the compliment of the input.An example of 4-to-1 multiplexer is IC 74153 in which the output is same as the input.In this case, D3 is transmitted to the output and Y = D3. If the control input is changed to A B = 1 1 , all gates are disabled except the bottom AND gate. Therefore, data bit D0 is transmitted to the output, giving Y = Do. The control input determines which of the input data bit is transmitted to the output.įor instance, as shown in figure, when A B = 0 0 , the upper AND gate is enabled, while all other AND gates are disabled. The output depends on the values of A and B, which are the control inputs. Only one of this is transmitted to the output Y. The 4-to-1 multiplexer has 4 input bits, 2 control or select bits, and 1 output bit. Some of the common types of multiplexer are 2-to-1, 4-to-1, 8-to-1, 16-to-1 multiplexer.įollowing figure shows the general idea of a multiplexer with n input signal, m control signals and one output signal. By applying control signals (also known as Select Signals), we can steer any input to the output.
The multiplexer used for digital applications, also called digital multiplexer, is a circuit with many input but only one output. For digital application, they are built from standard logic gates. For analog application, multiplexer are built using relays and transistor switches. Multiplexers can handle two type of data i.e., analog and digital. Therefore, multiplexer is used to perform high speed switching are constructed of electronic components. A mechanical switch cannot perform this task efficiently. However, circuits that operate at high speed require the multiplexer to be automatically selected. Multi-position switches are widely used in many electronics circuits. A simple example of an non-electronic circuit of a multiplexer is a single pole multi-position switch. A multiplexer is a circuit used to select and route any one of the several input signals to a single output.