How FM Transmitter Works. A FM transmitter is a device that uses the principles of frequency modulation to broadcast sound supplied at its input. Typical FM transmitter design’s usually follow the ...

Fig. 2: Block diagram of the high fidelity FM transmitter. Transistor T1 along with resistors R1, R2 and R3, capacitors C2 and C5, coil L1, trimmer capacitor VC1, and varactor diode D1 forms a voltage ...