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Altera_Forum
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14 years ago

How to implement a FIR filter with the ALTSHIFT_TAPS megafunction

Good day, I am trying to implement an FIR that will have 128 taps of 21 bits each tap. I am trying to do this with the ALTSHIFT_TAPS megafunction. However, I am confused with the TAP_DIS...
Altera_Forum's avatar
Altera_Forum
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14 years ago

To understand possible restrictions, it would be good to hear about the intended FIR sampling frequency.

Regarding ALTSHIFT_TAP, of course it's possible to clock the RAM at triple Fs, but I think it's more straightforward, to implement a RAM based shifter according to your needs directly. Particularly, ALTSHIFT_TAPS isn't able to multiplex RAM accesses according to the Fclk to Fs ratio.