Yes, the f0=40 kHz, Q=0.5 block can work well for 6th order Butterworh with 40 kHz cut-off. But Butterworth doesn't meet the linear phase requirement...
Instead of "0 to 10 kHz" you should give a feasible frequency range specification. A 4th order filter that keeps characteristic over frequency range...
Cut-off frequencies are not always calculated for -3 dB (half power point) attenuation. The Okawa tool apparently uses -6dB point, which explains the...
It's not feasible with FPGA, it has neither analog switch features nor an USB 2.0 PHY. Besides MAX4999, there's a number of high speed analog signal...
In usual terminology, "active front end" refers to a bidirectional AC/DC converter which is also able to recuperate power to the grid and sink/source...