In this fm modulator prototype the varactor bias was 7.5V for the best linearity but this could be different with other varactors. I love all about electronics, circuit diagrams and crazy projects ...

This block diagram can be implemented using either analog or ... FM is still used today in applications such as broadcast and land-mobile radio. How do we implement FM using quadrature modulation? In ...

We decided on the Boss FM-MOD wired modulator, available for under $25 ... Just flip the DIP switches according to the diagram; we're using 88.3 MHz. If you're using an iPod or other device ...