Digital electronics use a finite number of states, unlike analog electronics that treat continuous signals. Digital logic is used to perform arithmetic operations with electric signals, and constitutes the base for building CPUs.
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0answers
81 views
Error-Detection Circuit — How does this work?
I'm currently studying for finals (I have the solutions here already, so this isn't helping me bypass doing homework or anything like that.)
My professor has done an unsatisfactory job explaining ...
2
votes
3answers
105 views
Help with designing a circuit with logic gates
I want to build a circuit with the following design:
3 inputs
1 NOT gate
2 AND gates
1 OR gate
This is my truth table:
...
0
votes
0answers
45 views
Using D-Flip Flop for MSB and JK-FF for LSB
I have the above question as an exercise. I know how to do all of the operations. However, I didn't get the point where it says "You are required to use a D-FF for the
MSB, (A) and a JK-FF for the ...
0
votes
1answer
69 views
Maximum and Minimum delay of combinational logic circuits
I am preparing for my exam and I am stuck with this past year question:
In the circuit shown below, the blocks A, B, C, and S are combination logic circuits. FF1 to FF3 are D flip-flops with same ...
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votes
1answer
121 views
Best FPGA to work with [closed]
I want to work on DSP and artificial intelligence for my freshman project, I was thinking on make an FPGA based system, the problem is that I have little experience working with FPGA's; I already know ...
0
votes
5answers
130 views
What does 0 and 1 mean in logic gate (NOT gate to be specific here)
When the input to a NOT gate is 1, the output is 0. When the input is 0, the output is 1.
Now, does the input being 0 mean that no current is flowing into the gate and then out of the gate towards ...
2
votes
1answer
56 views
Is a 40109 fit for 3V3 <=> 5V level shifting?
I have checked couple of datasheets for 40109 and although they specify "Supply Voltage Range" as min: 3V, max: 18V, none of the other tables specify values for < 5V.
Can I safely order these ...
0
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3answers
201 views
Why do we still take digital logic? [closed]
I am a student in Computer Engineering, and I am wondering why programs still teach digital logic. We have already taken a computer organization class in which we learn about computer architecture ...
6
votes
2answers
92 views
process timing on FPGA
I'm new to fpgas, and there are some timing subtleties that I'm not sure I understand: if all my synchronous processes are triggered on the same edge, then that means my inputs are 'captured' on one ...
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votes
1answer
38 views
what are the things to keep in mind when interfacing two digital devices?
what are the things to keep in mind when interfacing two digital devices, e.g FPGA with a dual shock controller or CPLD with a PS/2 Mouse, Microcontroller with an FPGA, FPGA with an external RAM.
One ...
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votes
1answer
72 views
what type of electronics job would combine mathematics, electronic design and programming into one [closed]
There are quite a few different areas of jobs in the Electronics industry.
We have Analogue, Digital, Embedded, Telecommunications, Control and much more. What I wish to know is that what job would ...
3
votes
4answers
98 views
ADC resolution selection
I want to convert analog output of an accelerometer to digital codes.
I understand that the sampling rate of the ADC should be with reference to Nyquist criteria.
Please let me know how to decide ...
2
votes
1answer
82 views
Reed switch stays ON
I have an anemometer reed switch connected to a uC with a 10K pull-up. I then have a RC filter to debounce around 500Hz. This is the case:
A fairly old anemometer connected to my board powers the ...
0
votes
2answers
61 views
Signal to Noise ratio problem
A 200mv peak to peak sinusoidal signal is applied to an ideal 12 bit A/D converter, for which Vref(v p-p full scale) is 5v. Find signal to noise ratio.
This is a problem worked out by one of my ...
2
votes
1answer
59 views
Logisim - wire holds value 'e' when zoomed out, but not when zoomed in
I'm trying to make a multiplier in logisim. This is a full picture of my schematic:
As you can see, there is an 'e' coming out of my 'XXXXX-XXX00' adder. But, when I look at the schematic for ...
