Forum Discussion
Altera_Forum
Honored Contributor
12 years agoBeginner device CPLD/FPGA selection for anti-aliasing filter
Hi all, I am working on a HW design for power analysis of 8channel 50/60Hz signals that are sampled @ around 50kHz / channel. These signals needs to be filtered after sampling before transforma...
Altera_Forum
Honored Contributor
12 years agoHi Dave, and many thanks for a quick answer!
With transformation I mean going from time to frequency domain to be able to perform harmonic analysis etc. This could of course be done in the FPGA as well, but with current solution it is done later in a separate MCU. Could you explain shortly what you mean by a single multiplier? Unfortunately the filter you simulated seems to drop too much on frequencies below 3kHz. I guess that creating a filter which passes signals <3kHz and blocks signals >3kHz is only possible in theory, but something closer to that is required since I need to measure correctly up to the 50th harmonic (60Hz*50 = 3kHz...) So how is that achieved? A higher order? (As you notice, I am new to this...) Best Regards / ShakeTheSpear