noun
Technical term in electronics and telecommunications; a device that extracts the original information-bearing signal from a modulated carrier wave.
この復調器は、デジタル信号をアナログ信号に変換する。
This demodulator converts digital signals into analog signals.
The process of demodulation; 復調器 is the device that performs this process.
Compound of 復調 (demodulation) + 器 (device). The exact historical derivation is uncertain, but the term follows standard technical word-formation patterns.