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A decoder takes n inputs and produces 2^n outputs. An encoder takes 2^n inputs and produces n outputs.
A multiplexer selects one line from many lines. The inverse of selection is distribution. A demux essentially transmits data from one line line to 2^n possible output lines. The output line is determined by n select lines. In short, a multiplexer selects an input line, a demultiplexer selects an output line.
The differences between these two circuits is subtle, as far as I can tell. A demux simply selects an output line, nothing more. It's a glorified switch. A decoder takes n inputs, and uses those inputs to determine which of the 2^n output lines is high. This is the difference, I think. A decoder is designed to simply keep one line high. A demux is designed to set one output equal to the input (whether it be high, low, or a changing signal).
What else can I help you with?
What are the differences between electronic multiplexer and mechanical multiplexer?
An electronics multiplexer will select an output by a digital code. a mechanical multiplexer will select an out by a mechanical switch of sort possibly driven by a motor
What advantage does a statistical multiplexer have over a TDM multiplexer or an FDM multiplexer?
Statistical multiplexer does not reserve time slots or frequencies. Instead, it dynamically allocates bandwidth only when it is needed.
What does a multiplexer look like?
Physically a multiplexer usually looks like a box of some sort. More important is what is inside. The inside of a multiplexer contains a switch or switches, a power supply, and the electronic circuits to manage the system. One link is to informative datasheets for a couple of multiplexer Integrated Circuits from which much can be learned about multiplexer characteristics. There are many, many more kinds of multiplexer ICs.
Which can be used as a data selector?
multiplexer.
What is multiplexer tree in digital circuit?
Which has more number of input, It can be obtained by cascading two or more multiplexer with less nunber of inputs.
What is the difference between Reliance datacard or usb modem?
What is the difference between a data card and an usb modem?
What is the difference between dongle and modem?
yes
What is the difference between a pc modem and modem?
Nothing. They are both modems (MOdulator/DEModulator).
Difference between usb modem and normal modem?
A USB modem plugs into your USB port.A "normal" modem plugs into your RS232 port or your parallel port.
Difference between adsl cable modem and modem with wireless router?
a wireless router is needed when internet modem doesn't have wireless capability.
What is the difference between port speed and modem speed?
Port speed is how fast the computer talks to the modem. Modem speed is how fast the modem talks across the phone line to the other modem.
What are the differences between electronic multiplexer and mechanical multiplexer?
An electronics multiplexer will select an output by a digital code. a mechanical multiplexer will select an out by a mechanical switch of sort possibly driven by a motor
What is difference between internal modem and external modem on the basis of UART and price?
An internal modem is housed within the main computer. An external modem is on the outside of the computer and connected to the computer with a cable.
Is there any difference between a connection wired directly to a modem and a connection wired to a router connected to a modem?
There is a difference if you are using a low quality router. For good routers you will not notice any difference. Usually there is no difference at all.
Is there a difference between a standard telephone cable and a cable for the modem?
Telephone is Cat3 while the cable coming form the modem is Cat5
What is the speed difference between a cable modem connection and DSL?
Usually a cable modem is about 30 mbps and DSL can up to 768 kbps.
What is difference between encoder and multiplexer in digital electronics?
An encoder refers to a device that is used to change a signal or data into a code. Whereas a Multiplexer or mux is a device which performs multiplexing or it takes information from more than one channels and outputs into a single channel. Thus a multiplexer is basically a kind of encoder where its function is to combine multiple inputs into one output.
