The amplified IF signal is applied to the ____________ stage in a superheterodyne receiver:

In a superheterodyne receiver, the incoming radio frequency (RF) signal is mixed with a local oscillator (LO) frequency to create a lower, fixed intermediate frequency (IF). This IF signal is then heavily amplified and filtered in the IF amplifier stages to improve selectivity and sensitivity. Once the IF signal has been sufficiently amplified, it must be demodulated to extract the original audio or data information. The stage responsible for this extraction is the detector (also known as the demodulator). Therefore, the amplified IF signal is routed directly to the detector. The other options appear at different points in the signal chain. The LO feeds the mixer to create the IF, the RF amplifier is at the very front end of the receiver, and the audio output stage only comes into play after the detector has successfully extracted the audio baseband.