To understand how an FM receiver works, it's helpful to know a bit about how FM signals are generated. With FM, the instantaneous frequency of the transmitted waveform is varied as a function of the ...

Amplitude-locking snatches tiny FM signals from atmospheric swampSteve Bush Radio broadcasting using FM has advantages. Firstly, FM is almost as easy to demodulate as AM, so receivers can besimple.

Placing a sheet of atom-thin graphene into a feedback circuit causes spontaneous self-oscillation that can be tuned to create frequency-modulated (FM) signals. Changyao Chen, Sunwoo Lee, Columbia ...