The output of comparator is usually 3 binary variables indicating.
Design 1 bit comparator circuit.
We will compare each bit of the two 4 bit numbers and based on that comparison and the weight of their positions we will draft a truth table.
So we will do things a bit differently here.
In general a comparator is a device which compares two currents or voltages and produces the digital output based on the comparison.
A magnitude digital comparator is a combinational circuit that compares two digital or binary numbers in order to find out whether one binary number is equal less than or greater than the other binary number.
Consider one bit number a and b trust table is shown below.
The comparator is basically a 1 bit analog to digital converter.
Circuits that compare two voltages and give a digital output dependent upon the comparison of the two voltages are often used within electronic circuit design.
The logic circuit of a 2 bit comparator how to design a 4 bit comparator.
A b a b a b figure 2 1 1 bit comparator.
A comparator is shown as figure 2 1.
We logically design a circuit for which we will have two inputs one for a and other for b and have three output terminals one for a b condition one for a b condition and one for a.
For a comparator circuit a high gain amplifier is needed so that even small changes on the input result in the output level firmly switching.