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 Lessons In Electric Circuits -- Volume IV (Digital) - Chapter 9 lessons electric circuits volume combinational logic functions ...
   www.ibiblio.org kuphaldt electricCircuits Digital DIGI 9.html

http://www.ibiblio.org/kuphaldt/electricCircuits/Digital/DIGI_9.html
Lessons In Electric Circuits Volume IV Digital Chapter 9

... n Electric Circuits Volume IV Chapter 9 COMBINATIONAL LOGIC FUNCTIONS Introduction A Half Adder A Full Adder Decoder Encoder DEMULTIPLEXERs Multiplexers Using multiple combinational circuits Original author: David Zitzelsberger Introduction The term combinational comes to us from mathema ...

... aps.
The collection of equations is summarised here: The circuit is: And the corresponding ladder diagram: DEMULTIPLEXERs A DEMULTIPLEXER, sometimes abbreviated dmux, is a circuit that has one input and more than one output.
It is used when a circuit wishes to send a signal to one of many de ...

... s used when a circuit wishes to send a signal to one of many devices.
This description sounds similar to the description given for a decoder, but a decoder is used to select among many devices while a DEMULTIPLEXER is used to send a signal among many devices.
A DEMULTIPLEXER is used often enough that it has its own schematic symbol The truth table for a 1 to 2 DEMULTIPLEXER is ...

... uires a larger line decoder.
Increasing the number of signals that get transmitted is even easier.
As an example, a device that passes one set of two signals among four signals is a two bit 1 to 2 DEMULTIPLEXERIts circuit is or by expressing the circuit as shows that it could be two one bit 1 to 2 DEMULTIPLEXERs without changing its expected behavior.
...

... .
Its circuit is or by expressing the circuit as shows that it could be two one bit 1 to 2 DEMULTIPLEXERs without changing its expected behavior.
A 1 to 4 DEMULTIPLEXER can easily be built from 1 to 2 DEMULTIPLEXERs as follows.
Multiplexers A multiplexer, abbreviated mux, is a device that has multiple inputs and one outpu ...

... Using a 1 to 2 decoder as part of the circuit, we can express this circuit easily.
Multiplexers can also be expanded with the same naming conventions as DEMULTIPLEXERs.
A 4 to 1 multiplexer circuit is That is the formal definition of a multiplexer.
Informally, there is a lot of confusion.
Both DEMULTIPLEXERs and multiplexers have similar ...

... h DEMULTIPLEXERs and multiplexers have similar names, abbreviations, schematic symbols and circuits, so confusion is easy.
The term multiplexer, and the abbreviation mux, are often used to also mean a DEMULTIPLEXER, or a multiplexer and a DEMULTIPLEXER working together.
So when you hear about a multiplexer, it may mean something quite different.
Using multiple combinational circuits ...

... f the primary inputs are encoded at a time.
You may have noticed a potential question though.
When one of the digits are selected, what do the other three digits display? Review the circuit for the DEMULTIPLEXERs and notice that any line not selected by the A input is zero.
So the other three digits are blank.
We don't have a problem, only one digit displays at a time.
Let's get a perspective ...



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   users.libero.it sandry Digitale.htm


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   marcochirizzi.it files programma effettivamente svolto 5x.pdf

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