Multiplexers

Updated May 2, 2010

Click here to go to our main page on filters

Click here to go to our separate page on diplexers

New for May 2010! This page was split off from our filter page, which was getting to big for its britches.

The schematic symbol images shown below are provided in our free schematic symbols download which you can find here.

A multiplexer is a network that separates signals from a common port to other ports, sorted according to their frequency. A diplexer is a pair of filters arranged in a three port network, such that a signal at port one will be delivered to port 2 if it is a certain frequency band, and delivered to port 3 if it is in another frequency band. Not to be confused with a "duplexer", which is another word for a circulator. A way to remember which word applies to which device... diplexer has an "i" in it, so does the word filter. Duplexer has a "u" in it, so does the word circulator.

Triplexers are four port filters, where one input is split into three different frequency bands which each have a dedicated output port. Somewhere out there there are even higher orders of multiplexers, but we've never run across a "quadraplexer!"

Under construction!

Diplexer

Triplexer