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.
How do you make a comparator circuit?
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 do you set reference voltage for comparator?
Here the reference voltage is set using the voltage divider network comprising of R1 and R2. The equation is Vref = (V+/ (R1 + R2)) x R2. Substituting the values given in the circuit diagram into this equation gives Vref = 6V. Whenever Vin goes above 6V, the output swings to ~+12V DC and vice versa.
How do you use comparator electronics?
Comparator Circuit Working and Applications. Generally, in electronics, the comparator is used to compare two voltages or currents which are given at the two inputs of the comparator. That means it takes two input voltages, then compares them and gives a differential output voltage either high or low-level signal.
Why is it called 555 timer?
The basic 555 timer gets its name from the fact that there are three internally connected 5kΩ resistors which it uses to generate the two comparators reference voltages.
What is comparator and its types?
Comparators are classified into various kinds, such as electronic, electrical, mechanical, optical, sigma, digital and pneumatic comparators, these are used in various applications. Comparators play an essential role in designing electrical and electronic projects./span>
Which comparator has highest magnification?
Higher Magnification: A high as 30,000:1 magnification can be achieved with pneumatic comparators.
What is meant by comparator?
In electronics, a comparator is a device that compares two voltages or currents and outputs a digital signal indicating which is larger. It has two analog input terminals and and one binary digital output .
What is advantage of mechanical comparator over other?
What is the advantage of mechanical comparator over others? Explanation: Mechanical comparator is cheaper as compared to others. Mechanical comparators have more moving parts due to this friction is more and accuracy is less. External supply is not required.
Which of the following instrument is most accurate?
Electronic stopwatch, stop clock, pendulum clock and hour glass are the instruments used for measuring the time. Among the following, electronic stopwatch has the highest level of accuracy whereas hourglass has the lowest level of accuracy in measuring time.
Which of the following is incorrect about line standard?
Which of the following is not a line standard? Explanation: Length bar is an end standard. Yard, meter and precision scale are line standards. 2.
Which of the following option is incorrect for clearance fit?
3. Which of the following option is incorrect for clearance fits? Explanation: Shaft ‘n’ gives transition fit. ‘j’ to ‘n’ produce transition fit with H7 basic size.
How do you calculate least count?
The formula of Vernier calliper least counts is determined by dividing the smallest reading of the main scale with the total number of vernier scale divisions. The LC of vernier calliper is the difference between one smallest main scale reading and one smallest vernier scale reading of 0.1 mm 0r 0.01 cm.
What is least count of micrometer screw gauge?
Figure 6: Screw Gauge using micrometer The micrometer shown in Figure 4 has a pitch of 0.5 mm. It means that for one complete rotation of the thimble scale, 0.5 mm distance is traveled by the spindle. There are 50 divisions on circular scale. The least count will be 0.01 mm calculated as below.