Questions tagged [multiplexer]
A multiplexer selects one of two (or more) inputs based on a control input. It then outputs the selected input.
1,025 questions
3 votes
1 answer
109 views
Control voltages for for driving a CD4067B multiplexer
What control (address, enable) voltages do i need if i want to drive a CD4067B that is powered with +/-12V? The datasheet is confusing. Is it 0V to VDD or is it VSS to around 0V? The part only accepts ...
- 307
6 votes
3 answers
789 views
What is the best way to measure an analog signal from a precision measurement without loading the signal?
I need to measure the voltage from a precision analog circuit and apply this voltage to set open outputs of an analog MUX. To elaborate: I am designing a measurement system using a potentiostat to ...
- 81
1 vote
1 answer
75 views
Muxing PCIe differential reference clock and Power on the same signal line
We have a case where the Mini PCIe plug-in card outputs a voltage (power) on the Mini PCIe 100MHz REFCLK+ line. This means instead of an input clock signal, this can also be a power output! This is ...
- 304
1 vote
1 answer
83 views
Protect against voltage differences between audio sources
I'm trying to design an audio source and output multiplexer/selector, to play audio from one of a few sources on one of a few output devices (so only one path active at any time). Everything will be ...
- 113
0 votes
0 answers
56 views
Good way to set floating open outputs of an analog multiplexer?
simulate this circuit – Schematic created using CircuitLab I am using several analog multiplexers to switch signals from a potentiostat to various electrodes. I am powering the MUXs with 0V and ...
- 81
2 votes
3 answers
463 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 ...
- 335
0 votes
0 answers
41 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 ...
- 4,047
2 votes
2 answers
526 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 ...
- 335
-1 votes
1 answer
125 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
387 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
102 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
106 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
168 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
79 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
76 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)....
