fdatool to fpga
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I used fdatool to create VHDL of a lowpass fir filter with Fpass 1KHz and and Fstop 2KHz with sampling freq 20kHz.
I have a 12 bit ADC/DAC with a range from about -1.5V to 1.5V or -2048 to 2048 in signed binary. When I quantize the filter should I make the fraction length 0 so I get the +-2048 range or 10 so I get a range of +- 4V?
I am using a function generator for the input to the ADC.
0 commentaires
Réponse acceptée
Abhishek Gupte
le 11 Jan 2012
When you select the 'Set quantization parameters' tool in FDATOOL, in the 'Coefficients' tab, I would recommend checking the 'Best precision fractional length' checkbox. In the 'Input/Output' tab, you can set the 'Input range' to 1.5 V. I think that letting FDATOOL compute the best fractional length is the right way to go.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Filter Analysis dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!