Which logic gate is a basic comparator?

XNOR gate
Note: An XNOR gate is a basic comparator, because its output is “1” only if its two input bits are equal. The analog equivalent of digital comparator is the voltage comparator.

How does a comparator gate work?

The circuit of the equality comparator consists of an exclusive NOR gate (XNOR) per pair of input bits. The outputs of the XNOR gates are then combined in an AND gate, the output of which will be 1, only when all the XNOR gates indicate matched inputs.

What is a logic comparator?

The output of the logic comparator goes high when its Raw Value compares favourably with a fixed Compare Value. This object is used with an associated continuous control such as a rotary or a fader or a meter from a processing object.

What are the logic conditions in comparator?

A comparator compares two or more inputs using one, or a number of different comparisons. when the given relationship(s) is true, an output signal is given (logic 0 or logic 1). Comparators are only modeled using the if statement with an else clause and no else – if clauses.

What does a voltage comparator do?

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. Comparators are often used, for example, to check whether an input has reached some predetermined value.

What is a 4-bit comparator?

4-Bit Magnitude Comparator – A comparator used to compare two binary numbers each of four bits is called a 4-bit magnitude comparator. It consists of eight inputs each for two four bit numbers and three outputs to generate less than, equal to and greater than between two binary numbers.

How do you make a comparator?

Then the voltage levels between these two upper and lower reference voltages is called the “window”, hence its name. Using our idea above of a voltage divider network, if we now use three equal value resistors so that R1 = R2 = R3 = R we can create a very simple window comparator circuit as shown.

How is gate delay calculated?

The delay of a simple logic gate as represented in equation d = gh + p is a simple linear relationship. The fig 22.8 shows this relationship graphically. Delay appears as a function of electrical effort for an inverter and for a two-input NAND gate. The slope of each line is the logical effort of the gate.

What is the function of logic gates?

Logic gate. In electronics, a logic gate is an idealized or physical device implementing a Boolean function; that is, it performs a logical operation on one or more binary inputs and produces a single binary output.

How do logic gates work in computers?

A logic gate is basically a digital circuit. It works according to a logical relationship between the input signal/s and the output signal. Depending on the input fed, the logic gate will either let the signal pass through it or won’t allow the signal to pass through it.

How are logic gates constructed?

Logic gates are primarily implemented using diodes or transistors acting as electronic switches, but can also be constructed using vacuum tubes, electromagnetic relays (relay logic), fluidic logic, pneumatic logic, optics, molecules , or even mechanical elements.

What is the use of a logic gate?

A logic gate is an electronic component that can be used to conduct electricity based on a rule. The output of the gate is the result of applying this rule to one or more “inputs”. These inputs may be two wires or the output of other logic gates. Logic gates are digital components.