Design 1 Bit Comparator Circuit

A b a b a b figure 2 1 1 bit comparator. In general a comparator is a device which compares two currents or voltages and produces the digital output based on the comparison. The truth table for a 4 bit comparator would have 4 4 256 rows.

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2 logic design for 4 bit comparator 2 1 logic design procedure magnitude comparator is a combinational circuit that compares to numbers and determines their relative magnitude.

Design 1 bit comparator circuit.

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. I ii iii 1 bit comparator implementation using logic gate. Consider one bit number a and b trust table is shown below. So we will do things a bit differently here.

The output of comparator is usually 3 binary variables indicating. 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. A comparator is shown as figure 2 1. 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.

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. The comparator is basically a 1 bit analog to digital converter. The logic circuit of a 2 bit comparator how to design a 4 bit comparator. 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.

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