Hi there,
I read somewhere that, "The Bessel low-pass filters have a linear phase response over a wide frequency range, which results in a constant group delay in that frequency range. Bessel low-pass filters, therefore, provide an optimum square-wave transmission behavior."
I don't really understand the concept of phase response. Does a linear phase response mean that all the frequency components of the signal are shift by a linearly changing phase? Then will the whole output signal from the filter be shifted by a certain phase?
The reason I ask is that if I have a time multiplexed impulse/square wave train going into (non-linear) Bessel filter, how then can I demultiplex/deconvolve it on the output? Yes, I could use the clock source of the signal, but if there is a phase shift, the clock signal won't match the actual signal anymore, and I'll be picking up a totally different part of the signal...
Please help
Thanks
I read somewhere that, "The Bessel low-pass filters have a linear phase response over a wide frequency range, which results in a constant group delay in that frequency range. Bessel low-pass filters, therefore, provide an optimum square-wave transmission behavior."
I don't really understand the concept of phase response. Does a linear phase response mean that all the frequency components of the signal are shift by a linearly changing phase? Then will the whole output signal from the filter be shifted by a certain phase?
The reason I ask is that if I have a time multiplexed impulse/square wave train going into (non-linear) Bessel filter, how then can I demultiplex/deconvolve it on the output? Yes, I could use the clock source of the signal, but if there is a phase shift, the clock signal won't match the actual signal anymore, and I'll be picking up a totally different part of the signal...
Please help
Thanks