Linked from
The 6 pages that link to Demodulation, each with the reason it gives.
Radio receiverRelated: It extracts audio or data from the received radio-frequency signal.
Signal modulationRelated: It reverses modulation at the receiving end of a communication link.
ModemBroader topic: A modem’s receiver extracts transmitted data from the incoming signal.
Diode bridgeRelated: A diode bridge can act as a ring modulator in some signal-processing circuits.