Questions tagged [truth-table]
A truth table is a mathematical table used in logic—specifically in connection with Boolean algebra, boolean functions, and propositional calculus—which sets out the functional values of logical expressions on each of their functional arguments, that is, for each combination of values taken by their logical variables.
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Deriving Master–Slave T Flip‑Flop state table
I’m trying to confirm the state‑transition table of a T flip‑flop
implemented with a master–slave pair of level‑sensitive D latches.
1 Ground‑truth table: positive‑edge‑triggered T FF
The 4 × 4 ...
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LT spice, JK Flip Flop: Wrong behaviour when J K and Clock are high
Here's a picture of a JK Flip Flop I try to simulate with NAND gates:
This is the behavior I would expect; if Clk, J and K are all high, Q_n+1 should be negated Q_n:
However this is what I'm ...
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Combinational Circuit: How can 2.5 and 3.5 be represented in a 3-bit truth table?
Design of a combinational circuit with 3 inputs, x, y, z, and 3 outputs, A, B, C. When binary input is 0, 1, 2, or 3, the binary output is twice the input. When binary input is 4, 5, 6, or 7, binary ...
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Reducing a given truth table with don't cares at inputs
I searched quite a bit about this but it seems not many people have a similar interest as mine regarding don't cares. Most don't care topics I found revolve around simplifying the function at hand. I ...
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Help with truth table and K-Maps [closed]
I am currently working on a traffic light system, the state transition table developed for the project reads as follows:
I have additionally used Neeman's Digital software to create a table (and K-...
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Transition table from state truth table
Assuming a simple binary state variable allocation can be made and that any unused states can be treated as don’t cares. How would I Design a corresponding transition table for this system including ...
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Did I create this Karnaugh map correctly?
I'm tasked with making a 4-7 decoder for a 7-segment LED (common anode).
I am an extreme layman (1st year EEE student)
I have 4 inputs (A,B,C,D)
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Will the Karnaugh diagram change when you use gray code on the truth table?
I am currently trying to put this state diagram into a truth table:
I wrote the truth table like this:
When I try to get the expression for q1+ I get: q1+ = q1q0' + q1q0x, but I can apparently get: ...
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Query regarding 9 V battery connection to 7408 IC
I have got some LEDs, a breaboard, a 74HC08 IC, a 9 V battery, resistors of 10 and 100 ohms. I want to check the IC by connecting it to a breadboard but the IC input voltage is 5 V and current 8 mA. ...
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How do you cascade two 7-segment decoder ICs together?
We used one 74LS47 IC in our lab, which we connected to a 7-segment display and tested the outputs. Now our instructor has told us to cascade two 7447 ICs together and implement it on a 7-segment ...
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7-segment display decoder truth table
I am trying to make a decoder that can display all alphabetical letters on a 7-segment display. My inputs are ABCDE and the outputs are abcdefg
Is this the correct truth table for a circuit? If yes, ...
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Difference between waveform and truth table [closed]
Is there a difference between waveform and truth table to represent the values of a circuit?
For example:
Are there particular cases where one or the other should be used?
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Convert boolean expression to nand gate only. X = A'B'C+AB'C'+A'B'
I have already made a diagram. However, it won't match the truth table that I have made, which I got from the logic converter in multisim. Could you please help me out with where did I go wrong? Is it ...
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How to fill flip flop clock truth table? [closed]
I have this truth table that I want to fill, however, I have no idea how to read the flip-flops on the left. Can anyone provide me a minimal example of how to approach this problem?
EDIT: drawing ...
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Creating truth table
I want to create a truth table to see all options for 74HC123 output. Basically an optocoupler output is connected to 74HC123 as input. 74HC123 will get the data from optocoupler. There could be two ...
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