What is the working principle of magnitude comparator?

A digital comparator or magnitude comparator is a hardware electronic device that takes two numbers as input in binary form and determines whether one number is greater than, less than or equal to the other number. Comparators are used in central processing units (CPUs) and microcontrollers (MCUs).

What is the output of identity comparator?

Identity Comparator is a digital comparator that has only one output. It goes high when A = B, either both 1s (High) or both 0s (Low). This comparator can be implemented by a combination of logic gates (XNOR and AND gates) as shown in Figure 1.

Is a 4-bit magnitude comparator IC?

The 4-bit comparator is mostly available in IC form and common type of this IC is 7485. This IC can be used to compare two 4-bit binary words by grounding I (A>B), I (A

How does the comparator work?

A comparator circuit compares two voltages and outputs either a 1 (the voltage at the plus side; VDD in the illustration) or a 0 (the voltage at the negative side) to indicate which is larger. The circuit amplifies the voltage difference between Vin and VREF, and outputs the result at Vout.

What operation does comparator perform?

A comparator circuit compares two voltages and outputs either a 1 (the voltage at the plus side) or a 0 (the voltage at the negative side) to indicate which is larger. Comparators are often used, for example, to check whether an input has reached some predetermined value.

Which gate Cannot be used as an inverter?

Therefore we can implement any gate by using either NAND or NOR gate. X-NOR gate will acts as an inverter when one of the inputs is low. Therefore, NAND, NOR and X-NOR gates can be used as inverter. The output of AND gate is high when all inputs are high and output of AND gate is low when any one of the inputs is low.

What is 8bit comparator?

8-bit magnitude comparator. The 74HC688 is an 8-bit magnitude comparator. It performs comparisons of two 8-bit binary or BCD words. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V CC.

How many outputs are there in a comparator?

Explanation: A comparator is a combinational circuit that takes two numbers as input in binary form and results whether one input is greater, lesser or equal to the other input. In a digital comparator, only 3 outputs are possible (i.e. A = B, A >B, A < B). Other than this, the output will be 0.