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Difference between a schmitt trigger and an ordinary comparator?
Wiki User
∙ 11y ago
A Schmitt trigger is very similar to a comparator -- both have analog input and send out either a "high" or "low" digital output.
A comparator senses the difference between its "+" and "-" inputs.
If the "+" input is even a little bit higher than the "-", the comparator sends out a "high".
If the "-" input is even a little bit higher than the "+", the comparator sends out a "low".
A comparator has only one threshold value.
A Schmitt trigger can be built from a comparator and some resistors.
Typically the circuit involves positive feedback -- attaching a resistor to feed a small amount of the comparator's output back to the "+" input.
A Schmitt trigger has 2 threshold values.
Wiki User
∙ 11y ago
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Which circit is used as amplitude comparator?
Schmitt Trigger
What is a schmitt trigger?
A COMPARATOR CIRCUIT WHICH CONVERTS ANY ARBITRARY SIGNAL(SLOPE!=1) TO SQUARE WAVEFORM IN SHORT A AMPLITUDE COMPARATOR
What is meant by hysteresis voltage in schmitt trigger?
A schmitt trigger is a type of dual threshold voltage comparator, with the difference between the two thresholds being the hysteresis voltage. Only one of the two input thresholds is active at a time and it is controlled by the present binary state of the output of the schmitt trigger, making the circuit bistable. This allows the schmitt trigger to ignore small variations and/or noise in its larger input signal that would cause false outputs (glitches) in an ordinary single threshold voltage comparator as the input signal is crossing the threshold.Many digital logic ICs that are intended for use in noisy environments have schmitt trigger circuits built in on some or all of their inputs to increase their noise immunity. Schmitt triggers are also used in many analog sensing devices that produce digital outputs as a means of "filtering" spurious input signals from the real input signal.
How does a schmitt trigger work?
The schmitt trigger is an electronic comparator that has a slightly different voltage (or current) threshold for turning on than it does for turning off. This means that, once it turns on, it sticks on until the input signal decreases somewhat below the original turn-on point, and vice versa, once it turns off, it sticks off until the input signal increases somewhat above the original turn-off point. This is called hysteresis, and it effectively debounces the input signal and prevents short cycling.
What is conclusion of schmitt trigger?
It is an inverting comparator with a positive feedback, can convert an irregular shaped waveform to square waveform. it is also known as squaring circuit. sudhanshu kumar siliguri institute of tech. ece(2nd year)
Why is a Schmitt trigger called a regenerative comparator?
A Schmitt Trigger is a comparator, because it compares its input voltage to a "threshold" voltage, but it has _two_ threshold voltages (the upper and lower trigger voltages), and which threshold voltage is used depends on the output state. If the input voltage is higher than the upper trigger voltage, the output will be high (for a non-inverting Schmitt trigger). In this state, the input is compared to the lower threshold voltage, so the input now has to go below the lower threshold voltage before the output will go low. The threshold voltage depends on the output state, such that a high output selects the lower threshold voltage, and a low output selects the upper threshold voltage. This can be visualised as using a fixed threshold but adding a small voltage (the difference between the upper and lower threshold voltages, also called the hysteresis voltage) to the input voltage before it is compared. This small added voltage is high when the output is high, and low when the output is low. A small amount of the output voltage is effectively being added to the input voltage before it is compared to a fixed threshold. This is positive feedback, also called regenerative feedback. So a Schmitt trigger operates as a voltage comparator, and a small amount of the output is added to the input, so it uses positive or regenerative feedback.
Explain the operational of a schmitt trigger?
It is a type of comparator. It measures the input to see if it is above or below a certain threshold. The threshold varies to make it less likely that the output will switch rapidly back and forth due to a noisy input near the threshold.
What is the birth name of Harrison Schmitt?
Harrison Schmitt's birth name is Schmitt, Harrison Hagan.
Who is Harrison Schmitt's Parents?
whos harrison schmitt parents
When was Julius Schmitt born?
Julius Schmitt was born in 1884.
How tall is Vivian Schmitt?
Vivian Schmitt is 173 cm.
When was Ludwig Schmitt born?
Ludwig Schmitt was born in 1902.
