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Altera_Forum's avatar
Altera_Forum
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13 years ago

continuous averaging using VHDL

I have a question related to VHDL programming. I want to calculate the continuous average. My example code is: process (clk, reset) begin if (reset = '1') then state<=idle; out-v...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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For a 32 'sample' IRF I'd do:

y(n) = y(n-1) - y(n-1)/32 + x(n)

the average is then y(n)/32.

--- Quote End ---

Unfortunately your equation does not match 32 stage running averager at all. values shoot up very high and high frequencies are passed.

But it works if:

y(n) = y(n-1) - y(n-1)/32 + x(n)/32