Questions tagged [decoder]
A decoder is an electronic signal processing circuit, which takes as an input a binary number, and turns on a corresponding pin accordingly. It takes `n` inputs (which can all be either on or off) and outputs `2^n` outputs of which exactly one is on
247
questions
0
votes
0
answers
44
views
How to implement 2 stage pre-decoding
I've been studying VLSI and I came across a design problem regarding decoders.
Let's same I want to design a 12:4096 decoder using inverters, NAND 3 and NOR4 gates. Implementing this decoder without ...
0
votes
0
answers
20
views
Line decoder output changes when the initial clock value changes
I have been trying to code a fm0 decoder. Since the incoming data changes at both negedge and posedge of the CLK, to successfully decode the data, I need to sample the incoming data at the middle of ...
2
votes
2
answers
151
views
Does this Verilog HDL code of a decoder look strange in any way?
I am wondering if it is ok to use output instead of wire for another output in Verilog coding (using Quartus for this). Just ...
0
votes
1
answer
73
views
Why is memory addressed using 2 address decoders only and not more? [duplicate]
I am currently taking a university course about computer architecture in which we learned basic DRAM architecture and addressing. As far as I know, each latch is selected using decoder outputs to ...
1
vote
0
answers
53
views
Decoding Bit Rate Information for an LED Project Using a Logic Analyzer
I am currently working on a project where I'm trying to understand and decode the bit rate information being sent to an LED. I purchased an LED for my backyard that can be changed to different colors ...
- 11
0
votes
1
answer
175
views
Understanding decode stage of x86 fetch-decode-execute pipeline and its (lack of) register requirements
FDE pipeline has register requirements for the F & D stages: For fetching an instruction from memory, the instruction pointer register points to the memory location of the next instruction to be ...
2
votes
1
answer
269
views
How to display 2-digits data using two 7447 decoder?
I have designed a circuit to display the 2-digits data using two 7447 decoder. The design is shown below.
I have two outputs, O1 and O2. O1 represents the ones digit while O2 represents the tenths ...
- 41
0
votes
0
answers
91
views
24VAC Binary Encoder / Decoder for Sprinkler System
I have a typical sprinkler system that runs on 24VAC.
My sprinkler controller is in my garage and my sprinkler valves are across the yard with a cable running underground with 5 wires. One wire is the ...
- 111
0
votes
0
answers
85
views
Decoding Soil Moisture Sensor 433 MHz
I need to decode soil moisture sensor using RXB6 and ESP32. I tried several libraries; it can get data but not the correct one. Due to my knowledge on this 433 MHz radio, I can't figure out.
There's a ...
- 11
1
vote
1
answer
344
views
Why is my 7-segment display not working when output modules (O3-O0) are connected to BCD to HEX converter module?
I have used an 8051 interfaced with an 8255 taking inputs from port A and port 1 and showing the output from port B AND C of the 8255. I also made a decoder for BCD to HEX (0-F). The input value is ...
2
votes
3
answers
664
views
What are the considerations of using a common anode 7-segment display over a common cathode?
Common anode:
Do I need resistors here? Where would I connect them?
Common cathode:
Common anode seems simpler circuit wise - but I like the idea that "1" represents "ON" that ...
0
votes
0
answers
113
views
Connecting a 7-segment display to a CD4543B decoder
I would like some help connecting a 7-segment display to a CD4543B decoder according to the instructions in the image at the bottom, and get the display to show the expected numbers. How is it ...
- 15
2
votes
2
answers
61
views
Which of the following input binary conditions will produce an ambiguous state in the flip flop?
For ambiguous state, both outputs x and y must be zero(for active low) to be considered invalid i.e. of both PRESET and CLR are logic "0". Now, analysing the circuit, $$ x=a \oplus D_0 $$
...
- 129
0
votes
2
answers
47
views
Weird enable pins 74LV138D
The 74LV138D is a low-voltage 3 to 8 binary decoder.
It has 3 enable pins, one for each of the inputs.
However, two of them are active high, and one is active low... Why on earth would they not pick ...
- 435
1
vote
2
answers
169
views
Is BCD to 7 segment display a decoder or a driver?
In my book it specifically says that for decoders only one output is high for combinations of each input. And also the number of outputs are 2 power of number of inputs. None of these are true for BCD ...
- 684