Contents
Can a Schmitt trigger change a square wave into a sine wave?
And if we use the Schmitt Trigger for the same input signal we will get a correct input of two pulses because of the two different thresholds. So that’s the primal function of the Schmitt Trigger, to convert noisy square waves, sine waves or slow edges inputs into clean square waves.
Which comparator can be used as sine to square wave converter?
LT1719 comparator
The new LT1719 comparator can easily be used to create a low power, high performance, sine wave to square wave converter.
Can a square wave be turned into a sine wave?
It is therefore viable to use a low pass filter to create a sine wave out of a square wave. However one is restricted to a sine wave with the frequency the same as the period ( 1 / f o) of the input square wave.
What does a low pass filter do to a square wave?
Now, lets see what exactly a low pass filter does to a square wave. A low pass filter can be understood as a filter that cuts-off frequencies above a certain threshold when applied to some input. High frequencies which correspond to rapid transformations in the time domain are removed from the input and only the lower frequencies remain.
What happens when you change the frequency of a sine wave?
So, as stated above, changing the frequency of the input waveform, which in turn, changes the frequency of the output sine waveform can be a sticky thing. Different-value capacitors respond to different frequencies, so what capacitors may work for one frequency may not work for another frequency.
What is the amplitude of a filtered square wave?
Note that the amplitude of the final filtered square wave is about 0.5 volts. This is only 10% of the original amplitude of 5.0 volts. It becomes clear that filtering with passive components reduces the amplitude. Another problem with this approach is that it is frequency specific (about 1,500 Hz here).