Original Post
How Much Radio Do You Actually Need?
I fed FM RF into a single FPGA input pin and let the pin's logic threshold become the receiver's front edge.
A conventional FM receiver usually begins with an analog front end, a local oscillator, a mixer, an ADC, and a digital recovery chain.
I built around the transition stream from that pin instead of preserving RF amplitude through the usual mixer-plus-ADC path.
Otherwise, the work stayed trapped in the familiar loop: oscillator leakage, analog containment, ADC drive requirements, and digital processing burden before the real question was even answered.