The Op-amp comparator
compares one analogue voltage level with another analogue voltage level, or some preset reference voltage, V
REF
and produces an output signal based on this voltage comparison
.
What does a comparator circuit 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.
Where are comparators used?
Comparators are used in
central processing units (CPUs) and microcontrollers (MCUs)
. Examples of digital comparator include the CMOS 4063 and 4585 and the TTL 7485 and 74682. Note: An XNOR gate is a basic comparator, because its output is “1” only if its two input bits are equal.
Why do we use voltage comparator circuit?
A voltage comparator is an
electronic circuit that compares two input voltages and lets you know which of the two is greater
. It’s easy to create a voltage comparator from an op amp, because the polarity of the op-amp’s output circuit depends on the polarity of the difference between the two input voltages.
What does comparator mean?
Definition of comparator
:
a device for comparing something with a similar thing or with a standard measure
.
Why is comparator needed?
Comparators are
used to find-out deviation of dimensions between a given component being checked and a known datum
. The indicated difference in the dimensions is usually small and hence suitable magnification device should be employed to obtain the desired accuracy of measurements.
What is the function of the comparators in the 555 timer circuit?
A comparator is a circuit element that
compares two analog input voltages at its positive (non-inverting) and negative (inverting) input terminal
. If the input voltage at the positive terminal is higher than the input voltage at the negative terminal the comparator will output 1.
What type of circuits use comparators Mcq?
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. Because, all the input is compared to each other, therefore it is possible only by using 1 circuit.
What are comparators in software engineering?
A test comparator is
a tool to automate the process of comparison between the actual and expected results produced by a software product at the time of software testing
. This automation of comparison can take place during the testing procedure or after the testing procedure is complete.
What are mechanical comparators?
Mechanical comparator is
a measuring instrument
and the mechanism of this instrument is in the form of tape spring twisted, and that is positioned in the middle part. The middle part of the mechanical comparator rotates through a fixed angle upon tension which is shown in the figure.
How does Schmitt trigger work?
How Does a Schmitt Trigger Work? A Schmitt trigger
makes use of positive feedback
– it takes a sample of the output and feeds it back into the input so as to ‘reinforce’, so to speak, the output – which is the exact opposite to negative feedback, which tries to nullify any changes to the output.
How do you use a voltage comparator?
To create a voltage comparator that creates a positive voltage output if the input voltage is less than a reference voltage,
apply the reference voltage to the inverting (V
–
) input
, and the input voltage is applied to the noninverting (V
+
) input.
What is difference between comparator and zero crossing?
Zero crossing detector is a voltage comparator that
changes the o/p between +Vsat & –Vsat when the i/p crosses zero reference voltage
. In simple words, the comparator is a basic operational amplifier used to compare two voltages simultaneously and changes the o/p according to the comparison.
What is comparator data?
A comparison function
, which imposes a total ordering on some collection of objects. Comparators can be passed to a sort method (such as Collections. sort ) to allow precise control over the sort order. Comparators can also be used to control the order of certain data structures (such as TreeSet or TreeMap ).
Is comparator an interface?
Method 2: Using comparator interface- Comparator interface is
used to order the objects of a user-defined class
. This interface is present in java. util package and contains 2 methods compare(Object obj1, Object obj2) and equals(Object element). Using a comparator, we can sort the elements based on data members.
How does comparator work in Java?
Comparator , represents a
component that can compare two objects so they can be sorted using sorting functionality in
Java. When sorting e.g a Java List you can pass a Java Comparator to the sorting method. The Comparator is then used to compare the objects in the List during sorting.
Which is better comparator or comparable in Java?
To summarize, if sorting of objects needs to be based on natural order then
use Comparable
whereas if you sorting needs to be done on attributes of different objects, then use Comparator in Java.
What is the function of comparator Mcq?
Comparators MCQ Question 6 Detailed Solution
A comparator is a combinational circuit that
gives the output in terms of input signals
. It is used to compare numbers and represent their relationship with each other. It compares the signals as A > B, A < B, and A = B.
What are the fundamental requirements of comparators?
- 5.2. …
- (i) The instrument must be of robust design and construction so as to withstand the. …
- (ii) The indicating device must be such that readings are obtained in least possible time. …
- (iii) Provision must be made for maximum compensation for temperature effects.
What are the essential requirements of a good comparator?
FUNCTIONAL REQUIREMENTS 1. A
comparator should have a high degree of accuracy and precision.
2. Scale should be linear and have a wide range.
What is the working principle of 555 timer?
In bistable mode, the 555 timer acts
as an SR flip-flop
. The trigger and reset inputs are held high via pull-up resistors while the threshold input is grounded. Thus configured, pulling the trigger momentarily to ground acts as a “set” and transitions the output pin to V
CC
(high state).
What are the advantages of pneumatic comparators Mcq?
Explanation: In pneumatic comparator, there is no physical contact with setting gauge or part being measured. Due to this reason, there is no loss of accuracy due to gauge wear. It is
an accurate, universal, reliable and speedy device
.
What are the advantages of pneumatic comparators *?
1) In Pneumatic Comparator,
high magnification can be achieved
. 2) The gauging member does not come into direct contact with the part to be measured and hence no wear and tear takes place on gauging member or the workpiece. 3) The measuring is very small and does not cause any harm to the workpiece.
What are the advantages of pneumatic comparators?
Advantages of pneumatic comparator
It
is very accurate and precise
. High magnification up to 30000: 1 is possible in a pneumatic comparator. Since indicating device and measuring head are placed at different places, there is no interference. They are self-cleaning because a jet of air helps in cleaning the workpiece.
What is a comparator in research?
A comparator is
an investigational or marketed product (active control)
or placebo (inactive control) used as a reference in a clinical trial. … Comparators are used in clinical trials to compare the efficacy of an investigational drug to the efficacy of an existing treatment.
What is the effect of noise signal in the comparator?
If this signal is fed into a simple comparator,
the noise will produce a false turn-off spike
. If this same signal is fed into a comparator with hysteresis, as in Figure 7.5. 2, a clean transition results. In order to change from low to high, the signal must exceed the upper reference.
What is the output of comparator circuit?
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.
How can a comparator be used as zero crossing detector?
The zero crossing detector circuit
changes the comparator’s output state when the AC input crosses the zero reference voltage
. This is done by setting the comparator inverting input to the zero reference voltage and applying the attenuated input to the noninverting input.
Why do we use zero crossing detector?
Zero-crossing detectors are used
to synchronize switching with the AC wavelength or to extract the timing signal
. By using zero crossing techniques, high inrush currents can be avoided. … A device like this detects the transition of the AC mains signal waveform between positive and negative.
Why comparators are used in engineering practices?
Comparators are
generally used for linear measurements
. And it gives only dimensional differences in relation to a basic dimension of the object. Various comparators currently available basically differ in their methods of amplifying and recording the variations measured.
What are the advantages of mechanical optical comparators *?
- High accuracy will be achieved as it has very few moving parts.
- Less weight than other comparators because of fewer parts.
- The parallax error will be avoided.
- Due to the high magnification, very suitable for accurate measurement can be obtained.
How can a Schmitt trigger act as a zero crossing detector?
Schmitt Trigger Circuit
A Zero Crossing detector circuit with a feedback connection, usually positive, constitutes the Schmitt trigger. The Schmitt trigger circuit has definite predefined upper and lower input voltage levels that trigger the output to switch from one saturation level to the other.
Why Schmitt trigger is called regenerative comparator?
A Schmitt trigger circuit is also called a regenerative comparator circuit. The
circuit is designed with a positive feedback and hence will have a regenerative action which will make the output switch levels
. … It is basically an inverting comparator circuit with a positive feedback.
What is Smith trigger circuit?
In electronics, a Schmitt trigger is
a comparator circuit with hysteresis implemented by applying positive feedback
to the noninverting input of a comparator or differential amplifier. It is an active circuit which converts an analog input signal to a digital output signal.
How do I create a Schmitt trigger circuit?
- Step 1 : Determine hysteresis voltage. VH=VUTP−VLTP. Given, UTP = 1.5V and LTP = -1.5V VH=1.5–(−1.5)=3.
- Step 2 : Determine R1. VH=2R2R1+R2×VSAT. Assume VSAT=13V and R2 = 10KΩ 3=2×10K10K+R1×13V. R1=76.66KΩ
- Step 3 : Designed Circuit Diagram. ADD COMMENT SHARE EDIT.
What are comparators in metrology?
In Metrology, The comparator is
a Precision Instrument
, which is used to compare the dimensions of the given component with the actual working standard.
What is the difference between voltage comparator and zero crossing detector?
Zero crossing detector is a voltage comparator that changes the
output between +Vsat & –Vsat when the input crosses zero reference voltage
. Zero crossing detector circuit is used to produce an output stage switch whenever the input crosses the reference input and it is connected to the ground terminal.
When a comparator is used along with a Schmitt trigger has?
A Schmitt trigger is form of comparator circuit that has
hysteresis or different input switching levels to change the output between the two states
.
Is comparator functional interface?
Yes,
Comparator is a functional interface
. The equals is an abstract method overriding one of the public methods of java. … The Comparator only has one abstract method int compare(T o1, T o2) , and it meet the definition of functional interface.
What is natural ordering in Java?
Natural ordering is
the default ordering of objects of a specific type when they are sorted in an array or a collection
. The Java language provides the Comparable interface that allows us define the natural ordering of a class.
What is comparable and comparator interface?
Comparable and comparator both are
an interface that can be used to sort the elements of the collection
. … Comparator interface sort collection using two objects provided to it, whereas comparable interface compares” this” refers to the one objects provided to it.
