[brmarcum] obviously put some time into his tutorial, but it’s not a tome of FM modulation. He’s broken down the modulation and demodulation circuits into their basic op-amp stages with ...

High Stability with next-generation integrated NC FM stereo radio transmitter chip BH1415, built-in PLL advanced modulation system, audio pre-emphasis, limiter and low pass filter circuit.

Compared to the simple diode needed to demodulate AM radio signals, the detector circuits used for FM are slightly more ... talking about the mysteries of RF modulation; SSB, anyone?

and so do we in VCR FM modulation circuits. The effect of this after demodulation (in the post-detector circuit of a radio or the playback amplifier of a VCR) is to give a degree of HF lift to the ...