Questions tagged [multiplexer]
A multiplexer selects one of two (or more) inputs based on a control input. It then outputs the selected input.
1,020 questions
2
votes
3
answers
432
views
Design a system that receives X and X+2 as inputs and outputs X+1, without using adders or subtractors
I was asked to design a digital system that receives two inputs: X and X+2, and must output X+1, without using any adders or subtractors. (We weren't told what is the number of bits for X and X+2)
I ...
- 303
0
votes
0
answers
40
views
Connecting RC circuit to Enable pin of a MUX for enabling after power on
I am connecting TMUX1108 to electrochemical input of AD5941.AD5941 has only three GPIO pins.These GPIO lines will be connected to address lines of the MUX.No pin is available with AD5941 to control ...
- 4,001
2
votes
2
answers
361
views
Design of 16:4 priority encoder from 4:2 priority encoder
I was asked to build a 16:4 priority encoder using 4:2 encoders.
I’ve seen the solution with four first-stage P.E.s feeding a fifth P.E., plus two muxes. My problem is the intuition:
When I connect ...
- 303
-1
votes
1
answer
118
views
Latch based clock mux
I have been studying the clock muxed from this source:
https://vlsitutorials.com/glitch-free-clock-mux/
In this and many other websites, the clock mux is a flip-flop-based circuit. From what I ...
3
votes
1
answer
374
views
Is it feasible to switch between multiple USB devices on a single port without a mux?
I am designing a circuit board that will connect to a computer. As part of its functionality, I want to be able to select between multiple USB flash drives; but I'm not sure how to achieve this.
I ...
- 1,719
1
vote
2
answers
89
views
Does a USB 3.0 device need a MUX for SuperSpeed lines when using Type-C receptacle?
I'm designing a PCB which acts as a USB 3.0 SuperSpeed device (so with an Upstream Facing Port IIUC).
Is a Mux (like TI HD3SS3220) for SS lines/CC mandatory (to be a/ compliant and b/ allow the cable ...
- 13
0
votes
1
answer
97
views
Two transceivers sharing one antenna
I have two lower power (100 mW) transceivers, one 433 MHz one 915 MHz.
I would like them to share a single dual-band antenna.
In order to not damage the other, each transmitter's output needs to be ...
- 151
1
vote
2
answers
142
views
Cascading 16‑to‑1 MUXes to build a 64‑to‑1 in Logisim: what to do with the 12 unused inputs and how to interpret the S[7:4]/S[5:4] notation?
I’m working in Logisim‑evolution 2.7.1 and I have to implement a 64‑to‑1 multiplexer using ONLY the built‑in 16‑to‑1 MUX components (I imposed this restriction).
The standard two‑level tree seems ...
- 193
0
votes
1
answer
68
views
How should the ST pin be connected for TPS2117 power switching in priority mode (if Vin1 is connected, it is set as output)?
I am trying to build a circuit that takes one of two 5V inputs; it should output Vin1 if it is connected, and otherwise output Vin2. Here is an image of the circuit I designed using information from ...
- 3
0
votes
1
answer
73
views
Five UART-based sensors communicating to one UART STM32 microcontroller
I have five UART-based sensors from the same type which are continuously transmitting package at baud rate of 9600 kbps and every one second continuously (they have only TX and RX and power pins each)....
1
vote
1
answer
85
views
How to handle a CAN device pulling down the bus when unpowered
...essentially related to Electronically connecting/disconnecting device from a CAN bus.
I have a CAN bus (at 250 kb/s, not negotiable...) with 4-5 peripheral. For safety reason I have to completely ...
4
votes
5
answers
553
views
Isolated and multiplexed STM32 UART
Ok, this might be a silly question, but i'm kind of new to STM32 development.
I am designing a custom board that, among other things, it communicates with eight array of sixteen independent boards, ...
- 43
0
votes
0
answers
74
views
Very deep hierarchy in Altium method
I am designing a very complex PCB in Altium where 4 signals are demultiplexed out to 4096 endpoints each with some circuitry on the end. Due to the high frequency nature of these signals standard 2:1 ...
- 37
0
votes
0
answers
86
views
Using soft CS lines for SPI communication with ESP32 S3
I am planning to use ESP32 S3 for the communication with multiple SPI slave devices (10). According to the datasheet (https://www.espressif.com/sites/default/files/documentation/esp32-...
- 497
0
votes
1
answer
88
views
Determining the function of an 8x1 multiplexer and implementing it using a decoder
Express the function implemented by the given circuit as a sum of minterms and write the result in decimal notation in the form F = Σm(...). Then, draw the circuit that implements the same function ...
- 51