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Q: Why the input lines of multiplexer do not appear in the truth table with logic values?
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How do you design 32 to 1 multiplexer b using a 4 to 1 multiplexer?

To build a 64 to 1 multiplexer using cascaded 8 to 1 multiplexer, use nine 8 to 1's. Connect the first 8 to each of the 64 inputs, then connect the ninth to the outputs of the first eight. Connect the three address lines of the eight together to form 3 of the address lines. Connect the three address lines of the ninth to form the other three, for a total of 6 address lines selecting 1 of 64 inputs.This is a lot of logic. Fan-in and fan-out may be considerations. If you are trying to scan 64 switches, there may be a better way using an 8-bit output connected to a switch matrix (with diodes if you need more than one at a time close-able) and then connected to an 8-bit input. Even better, consider the 8279 keyboard/display controller.


What is the difference between a modem and multiplexer?

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).


How input device transfers data to the CPU?

Every input device attached to the motherboard bus lines has a direct line of communication with the CPU. These lines are known as interrupt request lines (IRQs) which can be prioritised. By signalling the CPU that an input is pending, the CPU can alert the operating system to deal with the request, which will then be prioritised accordingly.


What does a multiplexer do?

A multiplexing design can be used for a wide variety of applications.Computers:Networking, FireWire, USB, SATA, E-SATA, SPDIF, S-Vid, All utilizes different forms of multiplexing in order to carry a lot of information on very few wires. This makes connecting of these devices very easy.Stereo systems:CD-Players utilizes multiplexing in order to transfer data/music digitally to a digital input.Multiplexing of digital signals ensures less to no loss of quality in the transfer.Amplifiers with digital output. Any sound system with digital output utilizes multiplexing. This makes it easily possible to carry 6 channels of sound in only one fiber cable.General:Multiplexing is often utilized over large distances. It may be of interest to measure the temperature 6 kilometers (4 miles) down into an oil drill hole or other. Temperature can easily be converted into an electrical voltage but this voltage will be changing on its way up to surface due to capacitive loads and interference. The result may give a very wrong readout of temperature. By multiplexing signal, we can transfer digital data instead. Digital data are then interpreted via a de-multiplexer and we get an accurate result every time.Speed of multiplexing decreases over distance. The farther away, the slower speed.uses of a multiplexer correctlyThe use of Multiplexer is becoming a common technology equipment. What should pay attention to when use Multiplexer? This article show the details of using multiplexer:http://www.ingellen.com/blog/the-use-of-multiplexer.html


Design a combinational circuit that accepts a three bit number and generates a binary output equal to twice the input value?

There is no need for a combinatorial circuit to multiply a number by two. A binary number, left shifted one place, is twice the original binary number. The specific answer to the question is that you would connect the three input lines to the three high order output line of four output lines, and connect the low order bit of the four output lines to logic 0. If the three input lines were labelled A, B, and C, the output would be A, B, C, and 0.

Related questions

How many address lines are there in a 16 to 1 multiplexer?

20 address line available in 16 to 1 multiplexer 16 for input lines and 4 will be selection lines.


What is the use of selection input in multiplexer and de-multiplexer?

The concept of multiplexing is that we have 2n inputs but only one of them becomes the output for a given condition (or time). That particular input is selected by the combination of n selection lines.


What is multiplexer in digital electronics?

A multiplexer, sometimes referred to as a "multiplexor" or simply "mux", is a device that selects between a number of input signals. In its simplest form, a multiplexer will have two signal inputs, one control input, and one output. An everyday example of an analog multiplexer is the source selection control on a home stereo unit.


Is a combinational circuit that selects binary information from one of many input lines and diretcs to single output lines?

sounds to me like a digital multiplexer (MUX)


Why multiplexer is called data selector?

" In electronics, a multiplexer or mux is a device that selects one of several analog or digital input signals and forwards the selected input into a single .here data is a continious flow of siganal...so this is called data selector Raja chjatterjee MCA,TECHNO INDIA


What is the purpose of a fiber multiplexer?

There are many purposes of a fiber multiplexer. Fiber multiplexers are made to allow the transport of multiple E1 or T1 lines and Ethernet over fiber optic links. Fiber multiplexer also allow voice (phone) over fiber fiber transmission.


How do you design 32 to 1 multiplexer b using a 4 to 1 multiplexer?

To build a 64 to 1 multiplexer using cascaded 8 to 1 multiplexer, use nine 8 to 1's. Connect the first 8 to each of the 64 inputs, then connect the ninth to the outputs of the first eight. Connect the three address lines of the eight together to form 3 of the address lines. Connect the three address lines of the ninth to form the other three, for a total of 6 address lines selecting 1 of 64 inputs.This is a lot of logic. Fan-in and fan-out may be considerations. If you are trying to scan 64 switches, there may be a better way using an 8-bit output connected to a switch matrix (with diodes if you need more than one at a time close-able) and then connected to an 8-bit input. Even better, consider the 8279 keyboard/display controller.


What is a multiplexing?

In physical science, a electronic device may be a device that selects one in every of many analog or digital input signals and forwards the chosen input into one line. A electronic device of 2 or N number inputs has n choose lines, that ar wont to choose that input line to send to the output. Multiplexers ar principally wont to increase quantity of knowledge that may be sent over the network among an explicit amount of your time and information measure. In fiber optic networking, a multiplexer contains many types such as CWDM multiplexer, DWDM multiplexer and Video multiplexer / Audio multiplexer / Data multiplexer, etc.. (all these multiplexers can be found in FiberStore with pictures)


Name the vodsl network component that is responsible for terminating the dsl lines at the central office?

DSL access multiplexer (DSLAM)


What is the difference between a modem and multiplexer?

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 is the relationship between two variables?

The relationship between two variables is called a relation. A relation in which a set of input values maps onto a set of output values such that each input corresponds to at most one output is called a "function." Functions do not necessarily have to be lines; they do not even have to be exponential, or parabolic, or continuous. A bunch of scattered points or lines that meets the requirements can still be considered a function involving two variables.


How many data input and data output lines does a RAM having capacity of 64K 16 need to have?

5 data input lines and 5 data output lines