RF receivers are such electronic devices that discrete radio signals from one another and transform specific signals into respective audio, video, or data formats. It uses an antenna to receive transmitted radio signals and a tuner to separate a specific signal from all of the other signals that the antenna receives. Detectors or demodulators at that moment extract information that was programmed formerly to transmission. There are numerous customs to decode or modulate information. Keywords: CMOS, amplitude modulation (AM), frequency modulation (FM), amplitude shift key (ASK), frequency shift key (FSK), phase shift key
