Re: cw filters
The MAX7400 is a low pass filter, however if the uBitx crystal filter is doingtoggle quoted messageShow quoted text
its job there should already be a sharp lower cutoff frequency of around 300 Hz.
So the total system is effectively a good sharp bandpass filter.
That lower cutoff frequency can be adjusted by moving the BFO.
On Fri, Oct 18, 2019 at 03:58 PM, Jerry Gaffke wrote:
The MAX7400 switched capacitor audio low pass filter is an interesting part.