Ideas for implementing a frequency modulator [hlp]

Dear engineers;
Let's talk about different ideas for implementing a frequency modulator.How many ways exist for implementing an FM modulator? (Digital and Analog) Let's talk about each way.

Hi No one

I think the easiest way for implementation of FM modulator is using varactor diods(VCO) with a simple oscillator such as colpitts

http://profile.iiita.ac.in/IEC200704...20part%203.ppt