A demodulator is an electronic device that converts modulated signals back into their original form. Modulation is a process used in communication systems to encode information onto a carrier wave, making it suitable for transmission over various media. The demodulator extracts the information from the modulated signal, allowing devices like radios and televisions to receive and interpret audio and video content. Demodulators are essential in various applications, including radio broadcasting, television, and data communication. They work by reversing the modulation process, which can involve techniques such as amplitude modulation (AM) or frequency modulation (FM). This enables users to access the transmitted information clearly and accurately.