FM Frequency modulator

The FM modulator circuit (frequency modulation) is built with a Motorola MC1648P oscillator. ... The output frequency of approximately 100 MHz can be adjusted by changing the value of the inductor. The output frequency can vary as much as 10 MHz on each side. The output level of the modulator is -5 dBm. FM modulators come in two forms: wireless and hard-wired. A wireless FM modulator (also referred to as an FM Transmitter) plugs a listening device straight into your car's cigarette lighter socket. The wireless FM modulator then broadcasts a weak, low-range signal so your car's radio can pick it up and play it. Fm modulator can be made by many ways eg:- Using 555 timer, Comparators, Operational amplifier adjusted in series of circuits