High-Q switched-capacitor BandPass Filter?

[mikem]

Would you be thinking of a boxcar averager?

I read about "boxcar averaging algorithm", and it seems to be
a way to minimize noise by oversampling and low-pass filtering.
Does this provide a means of suppressing the higher order
harmonics (second, third, etc) while passing only the
fundamentanal?

What sort of phase shift does it introduce?

MikeM

 

[Dave VanHorn]

I read about "boxcar averaging algorithm", and it seems to be
a way to minimize noise by oversampling and low-pass filtering.

I'm referring to the hardware implementation.
It's an averager, not a low-pass.
If you have a wave that has a big transition in it, and your boxcar has
enough resolution, then you get the transition nicely, even though the
filter has a bandpass that's fractional hz.

Does this provide a means of suppressing the higher order
harmonics (second, third, etc) while passing only the
fundamentanal?

No, but you can do a front end filter that will.
Even order harmonics drop out destructively.

 

[Jerry Avins]

I'm referring to the hardware implementation.
It's an averager, not a low-pass.
If you have a wave that has a big transition in it, and your boxcar has
enough resolution, then you get the transition nicely, even though the
filter has a bandpass that's fractional hz.





No, but you can do a front end filter that will.
Even order harmonics drop out destructively.




None.

True but possibly misleading. It introduces a delay that is the same for
all frequencies.

Jerry

 

[Dave VanHorn]

True but possibly misleading. It introduces a delay that is the same for
all frequencies.

True. It's not what you usually think of, when you think of a filter.

Engineering is the art of making what you want from things you can get.

I like it!