yes i know i am also listening it on my speakers but i want to convert it into sine wave
Somebody wrote that a simple RC circuit can convert square to sine wave
How to calculate values of Resistor and Capacitor for 300 Hz Square Wave
Kindly explain me their connectivity
That`s nonsense. A simple RC circuit (first order lowpass) cannot change a squarewave into a sinusoidal signal. In theory, you would need an IDEAL lowpass (brickwall response) to remove all harmonics. As I told you earlier, a lowpass of order n=2...4 will do the job - depending on your THD requirements.
Regarding Narshben`s suggestion, I doubt if an elliptical filter is the best choice for this purpose due to its complexity.
For "any filter"? Do you know that there are several books dealing only with filter design?Can u send me circuit diagram for any filter
Thanks
That's difficult, because 3rd harmonic of 250 Hz is very near to 600 Hz. You didn't yet mention this requirement, by the way. But I assume, that you're able to find suitable filters from literature. The TI FilterPro software is one of many available resources.Actaully i am having several frequencies which are controlled through push button
the range of my frequencies is from 250 Hz to 600 Hz
will this filter work for whole range of frequencies
That's difficult, because 3rd harmonic of 250 Hz is very near to 600 Hz. You didn't yet mention this requirement, by the way. But I assume, that you're able to find suitable filters from literature. The TI FilterPro software is one of many available resources.
To generate a sine signal over a certain frequency range, a RC generator tuned with two resistors, e.g. a stereo potentiometer, seems more reasonable in my view. There are many previous threads about sine generators at Edaboard.
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