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f-alpha.net » Electronics » Digital Electronics » Digital Comparator » Let's go... » Experiment 4 - 1-bit Magnitude Comparator

Experiment 4 - The 1-bit Magnitude-Comparator

First look at a 1-bit comparator. The truth table has been expanded by two results and therefore the circuit diagram becomes much more complicated.

x y x<y x=y x>y
0 0 0 1 0
0 1 1 0 0
1 0 0 0 1
1 1 0 1 0

Truth table of a 1-bit magnitude comparator.

Circuit diagram of a 1-bit magnitude comparator.

With the circuit shown you build the 1-bit magnitude comparator.

Circuit of a 1-bit magnitude comparator. (Enlarge)

As you can see, a 1-bit magnitude comparator is significantly more complicated than the corresponding one-bit identity comparator.

Next, you look at the 2-bit magnitude comparator.

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