Which of the following FM detectors is a classical design dating back to vacuum tube technology?
A) quadrature detector
B) diode detector
C) Foster-Seely detector
D) PLL detector

Question

Quizplus · Accepted Answer

The Foster-Seely discriminator or detector is a classical FM detector design that dates back to the era of vacuum tube technology. It uses a transformer and diodes to convert frequency variations into amplitude variations, which are then detected. This design was widely used in early FM radio receivers.

Which of the Following FM Detectors Is a Classical Design