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23rd November 2008, 11:06 #1
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difference equation dsp
What is the difference between a Differential equation and a Difference equation?

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25th November 2008, 07:20 #2
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Re: DSP
differential equations must conatian terms with their rate of change like dy/d,it may also contain terms with intergeral ∫f(x)dx,these equations r mostly used for analog system containing capacitors,resistors n inductor kind of things.
on other hand difference equations r like this y[n] = x[n]+ x[n1]y[n1] kind of terms,these equaions r used for digital systems

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12th March 2012, 06:21 #3
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Re: DSP difference between Differential and Difference equation
Hi all:
I have a very basic question about difference equations. I seem to be going in circles trying to find the answer online.
1. if someone asks you to obtain the difference equation of a low pass filter with cut of freq say 60Hz, how would one go about doing it? Once you get the difference equation you can write the software, but I just can't remember how to get the difference equation.
2. The coefficients for the difference equations are scaling factors right?
I mean, if y(n) = a1x(n) + a2x(n1), the coeff's are scaling factors for signals x(n) and x(n1), correct?
Someone please help me!
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