[brmarcum] takes us back to analog building block basics with his Frequency Modulation and Demodulation tutorial. Frequency Modulation (FM) sounds simple at first, but understanding 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 ...

Conventional FM transmitters lack DC response to the modulation input. Two point modulation is a solution to get around this problem and achieves dc response. In this method, both the VCO in the PLL ...