Compared to the simple diode needed to demodulate AM radio signals, the detector circuits used for FM are slightly more complicated. Wrapping your head around phase detectors, ratio detectors, disc… ...

FM Signal Detection The Pulse-Counting Way August 28, 2019 by Dan Maloney 7 Comments Compared to the simple diode needed to demodulate AM radio signals, the detector circuits used for FM are ...

FM antenna booster This is a low cost fm antenna booster that can be used to listen to programmes from distant FM stations clearly. The antenna fm booster circuit comprises a common-emitter tuned RF ...

Fig. 1: A simplified linear detector circuit of the Bose FM multiplex detector from the patent documents. Fig. 2: John Bose enjoys a hearty meal in the Alpine FM transmitter building in July, 1939.

It uses a PLL frequency synthesizer built with MC145151, which covers the FM band in 100kHz steps. The VCO covers only a few MHz without readjustment. The pll transmitter output power is controllable ...

The standard hardware requirements for sample-and-hold and peak detector circuits apply to D1, C1, and A2. C1 must be a high-quality capacitor, D1 must be a low-leakage diode, ...