A multiplexer selects one of two (or more) inputs based on a control input. It then outputs the selected input.

learn more… | top users | synonyms (1)

-1
votes
2answers
42 views

Analog crosspoint switches

I am looking for analog crosspoint ICs that have a high number of channels, that can operate over 10V and are bi-directional. Currently I am using the circuit CD22M3494 and I am looking for an ...
0
votes
0answers
13 views

Is the multiplexed wire of bus chipsets also referred to as a bus or does it have some other name?

Simple, anal-retentive technical question: When you configure any bus chipset as a local "network", like in a CAN, is the single wire/data channel also referred to as the bus, or by being an extension ...
0
votes
1answer
27 views

Function of demultiplexers in Register File

What is the function of demultiplexers (DMX) in this Logisim diagram of a Register File design: Also could you explain the meaning of: dreg,sreg,treg dsel,ssel,tsel dwrite,swrite,twrite
0
votes
1answer
32 views

AD8113 operating voltage

I'm looking at high channel multiplexers that can operate at voltages over 10V and for this component it says that the supply voltage is 12V which is okay for my application, but when you read under ...
-2
votes
1answer
35 views

Implement Boolean function using only 4x1 multiplexer considering A and D as input and B,C as selection values

F(A,B,C,D) = Σm(0,1,3,4,6,7,11,12,14,15) How do I use A and D as input and use only 2 selection lines for a 4 variable function?
-2
votes
2answers
58 views

Implement the following logic function using only one 4-to-16 line decoder and one 16x1 multiplexer : F1(A,B,C,D) = Σm(0,1,4,7,12,14,15)

I can implement the given function separately with a decoder or a multiplexer. What does the question mean when it says "and"? If I have to use both, how do I do that? I'm not very good with ...
-3
votes
1answer
33 views

How mobile tower functions? [closed]

How mobile tower handle so many users calls does they use multiplexers ? Or which device they use?
-5
votes
0answers
110 views

What is the ABEL code for this 12x1 Multiplexer and Truth Table

I have to create a 12x1 multiplexer using two 8x1 multiplexers. Here is the truth table, I need the ABEL Code.. Please tell me how to write the ABEL code for this truth table of the given scenario. ...
0
votes
0answers
36 views

Confusion in creating 16 input Multiplexer using two 8input multiplexers

I have 16 inputs A0 to A15. Selection pins: 4 (S0 to S3) I want to create a 16 input multiplexer using two 8input multiplexers combination. But I dont know where to connect the selection pins and how ...
5
votes
1answer
71 views

What does a 'full 18×16 barrel shifter' mean?

My practical textbook asks me to design a full 18×16 barrel shifter on paper. I have tried looking around but cannot seem to figure out what the A×B convention means when describing a barrel shifter. ...
0
votes
1answer
32 views

Should I use NMOS or PMOS in CMOS demultiplexer circuit?

I am trying to design a simple 1:2 demultiplexer. I have two question here. First, is the following design right?: (simulation shows that it is working) in_D is the input data line, in_S is the ...
0
votes
0answers
28 views

Significance of bias when driving an LCD

I've got hold of several bare-glass T218010 LCDs and would like to drive them with a bare MCU (or, rather, an MCU plus a couple latched-output SIPO shift registers such as 74HC595). However, the only ...
0
votes
2answers
79 views

barrel shifter using multiplexer: how to go about it

I am trying to under stand how to build a barrel shifter using multiplexers. I understand how the barrel shifter works but I don't get how you decide the number of multiplexers to use, and how the ...
1
vote
1answer
37 views
0
votes
0answers
24 views

Implement a function using a 8 to 1 demux

Implement using using a 8-to-1 demux, by using "1", "0" constants and OR gates the following function: \$\ F(A,B,C) = ABC+ \neg ABC \$ (Sorry could'nt find the right not sign) I figured I need to ...
0
votes
0answers
17 views

Muliplexer 4 Way Implementation proves

There's Mux4Way functional table: I have already know right way for implementation of this chip by using another 3 Multiplexor chips when mux functions as following: ...
4
votes
1answer
76 views

Circuit for Current Injection and Voltage Reading

I am developing a sensor based on the principle of EIT (Electrical Impedance Tomography). For the project, I need to inject into the material I am using, a constant current between two electrodes ...
0
votes
1answer
62 views

“Tagging” Data traveling over serial port?

If I'm reading data from multiple channels (UART) of a microprocessor, but I want it to be continuously read, I imagine the logical thing to do would be to cycle through the channels and output data, ...
0
votes
1answer
55 views

VHDL - Issue with simulation of testbench - Modelsim PE Student 10.4

I'm very new to VHDL and got an issue with the simulation time in Modelsim PE Student Edition 10.4. I wrote some files for a RTL-model such as multiplexer, demultiplexer and register. To test my ...
0
votes
0answers
45 views

How to simulate this multiplexer in transistor level?

This is a schematic of a hazard-free multiplexer taken from B. Lin and S. Devadas, “Synthesis of hazard-free multilevel logic under multiple-input changes from binary decision diagrams,” IEEE ...
0
votes
1answer
74 views

Mux and Adder going into Infinite Loop

I have been trying to learn verilog with help of a project. The mix that takes adder output as input and gives input to adder as per the control signal is going into an infinite loop, but it should ...
3
votes
2answers
55 views

Solid state device for switching (muxing) a bipolar high current signal

I'm looking into solid state relays for an application where I need to switch between two different transducers to allow two different modes of operation for an echo sounder. Basically a MUX that ...
0
votes
2answers
79 views

What is Vee on a 74hc4051 mux? [duplicate]

The 74HC4051 Mux (spec is here: http://www.nxp.com/documents/data_sheet/74HC_HCT4051.pdf) has 8 input/output pins labelled Y, one output/input pin labelled Z, three digital selectors S0, S1, S2, and ...
0
votes
1answer
34 views

Multiplexer with enable at a karnaugh map

We have multiplexer 2->1 with reverse enable: (sorry for the child-like graphics) the function table is the following e c Y 1 X 0 0 0 x0 0 1 x1 I tried to make a karnaugh map, ...
1
vote
2answers
48 views

Boolean expression of MUXs

I want to make sure I understand writing boolean expressions for MUXs. For F0, I derived the following boolean expression: \$\ F0 = S1’S2’(A’B + AB’)\$ from this circuit: Is this correct? If so, ...
-1
votes
2answers
50 views

Boolean expression with MUX circuits

Let's say I have a 4:1 MUX circuit of inputs: C--->...............................output: F2 C'--->........4:1 MUX........ C' --->............................. C --->.................................
1
vote
3answers
118 views

Chain 16-channel analog multiplexer/demultiplexer

I'm trying to figure out how to chain six 74HC4067 or similar 16bit multiplexers. My goal is to read multiple analog inputs one after another with Arduino. I have only 1 analog pin input and 7 ...
0
votes
0answers
18 views

Implement 2 bit adder using 4:1 Multiplexer [duplicate]

How can i implement the 2 bit full adder using only 4: 1 multiplexers? I created a truth table for a two-bit full adder, which looks like this: I don't know how to do multiplexer folding and ...
0
votes
0answers
44 views

How do I use the CD4026 IC with a multiplexed 7-segment display?

I have 2 pcs. of 3 digit multiplexed 7-seg display (ELT-511SURWA) and 6 pcs of CD3026. I am building a frequency counter (CD4060 + crystal as timebase). I have considered using 6x UDN2983 + CD4017 + ...
5
votes
4answers
343 views

Making an ID of a board type

I want to make hardware ID of a board without using microcontroller or any kind of pre programmed eeprom. All boards of same type will have the same ID. One ID per board type. I was thinking of using ...
0
votes
1answer
46 views

Using BILATERAL SWITCH properly?

Summery: I am trying to figure out if I can use a bilateral switch as if it was a tiny relay capable of communicating UART signal, or are there things I am missing. Now, the long explanation. So, I ...
3
votes
1answer
105 views

Display Double Digit Numbers on 2 seven segment displays

I'm making an Arithmetic Logic Unit(ALU) for an assignment and I'm on a point. So according to my circuit design on the link shared below, I am able to output 1 digit of my alu. It is a 4 bit ALU so ...
0
votes
1answer
61 views

Correct 2 to 1 Multiplexer Truth Table

What is the correct way to write a 2 to 1 multiplexer truth table? In a couple of tutorials I've come across (1,2), the table is presented as follows: However, the same tutorials show the 4 to 1 ...
0
votes
1answer
48 views

Switch TENS unit between many channels

I would like to switch the output of a tens unit (one of those things that uses electricity for pain relief) to 8+ different outputs. I want to create an electro tactile device. The idea is to switch ...
0
votes
1answer
97 views

NPN or PNP for multiplex seven segment display?

I want to put three multiplexed seven segment displays on a pcb module which then will be connected to another board through a 1x12 Pin header housing an ATMega (so assume in the following that Pin 11 ...
0
votes
1answer
59 views

Interface 10 image sensors to Linux CPU

I need to process image data from 10 image sensors simultaneously (namely from OnSemi MT9V022s or similar). All 10 sensors will be externally triggered by a common signal. Ideal solution would be to ...
0
votes
1answer
56 views

MOSFET ORing behaving differently with fast slew rate on one of the Input rails

I am giving more details about the problem . pls read patiently. we are using p-MOSFET's ORing to do automatic switchover b/w @ 12V_External (comes from PCIE edge) and emergency battery. The circuit ...
1
vote
2answers
100 views

Is it possible to read a 10 by 10 switch matrix with 8 by 8 I/O pins?

I was asked this question on an interview: given 8 output pins and 8 input pins on a microcontroller, is it possible to read a 10 by 10 switch matrix without using multiplexor and demultiplexor chips? ...
2
votes
1answer
99 views

Assign I²C address to multiple devices on the same bus

I've got a couple of ADCs on the same I²C bus, which all default to the same address. My first instinct tells me to use an I²C multiplexer like the TCA9544A but that would require sending a byte to ...
0
votes
0answers
52 views

Constructing 16-1 Multiplexer from four 4-1 Multiplexers and a 2-4 Decoder

I have to show how to construct 16-1 Multiplexer from four 4-1 Multiplexers and a 2-4 Decoder. I tried creating 8-1 MUX from two 4-1 MUXes (using enable pin), but have no clue how to stack more MUXes ...
0
votes
0answers
41 views

Ideal multiplexers

I need thorough tests on different voltage biasing of an analog design. I figure all I just need to generate all combination of conditions (mostly voltage levels, some frequency) and port ...
0
votes
4answers
66 views

How does the OR gate work?

I'm asking this in reference to multiplexers where there are multiple inputs to the final OR gate. Say I have two different signals to an OR gate. One is at 4V and the other at 5V. So if I'm letting ...
2
votes
2answers
112 views

Did I hook up this CD4052 Analog Multiplexer correctly?

Upon reading the data sheet this chip seems straight forward, but I'm having the hardest time hooking up the CD4052. The chip I'm using is actually a, "CD4052BE". Here is a link to the datasheet. I ...
0
votes
3answers
76 views

Multiplexing 2 times 4 CC RGB LED's

I need to make 2 sets of 4 Common Cathode RGB LEDS. In each set of 4, every led must be individually addressable. It doesn't matter if both sets have duplicate outputs or not. (Although optimally they ...
0
votes
2answers
162 views

analog multiplexer CD4051BE

I want to test the analog inputs of a CD4051BE multiplexer, so I created four voltage dividers in order to measure four different values of analog input. I connected them to the I/O0 - I/O3 ports of ...
0
votes
2answers
36 views

2-to-1 Multiplexer logic equation: is order of inputs important?

The boolean logic equation for a 2-to-1 multiplexer is \$(A.\bar{S})+(B.S)\$, where \$A\$ is the first input and \$B\$ is the second input. Is this logic equation equivalent to \$(A.S)+(B.\bar{S})\$, ...
0
votes
1answer
37 views

OFDM with CSMA/CA

Most Wifi standards (e.g. 802.11a) use OFDM for orthogonal frequency multiplexing, i.e. assigning different subcarriers/frequencies to different users. On the other hand, it says CSMA/CA is used to ...
3
votes
1answer
58 views

Switching Serial Connections among several devices?

I have 3 devices that communicate via a serial port. Let's call them Device 1, Device 2, and Bluetooth (BT to serial adapter). The BT is used to communicate with a computer, but it can be treated just ...
0
votes
1answer
54 views

Multi-channel high frequency signal acquisition

I have to design a test bench for a device that has more than 1000 outputs. The voltage of these outputs will be about 10mV peak-to-peak, the frequency will be in the range of 100MHz (for the carrier) ...
-1
votes
1answer
56 views

Is it possible to multiplex the same frequency (without bandwidth division)?

I have a range of bandwidth (e.g. [865,868] MHz) and more than one RFID tag I'd like to receive information from, over that range. How could I multiplex those ...