> 5.2 | Clamp Diodes

> A pair of diodes (e.g. BAV99) is required; the anode must be connected to GND and the cathode to the positive supply voltage (see the schematics shown in Figure 15, Figure 16 and Figure 20.
> Advantages: Low cost, requires minimum space.
> Disadvantages: The overvoltage is fuzzy as it largely depends on the internal resistor of the diode. The effect can be improved with Schottky diodes or high current diodes. Semiconductors always are a source of RF demodulation. Each semiconductor needs to be RF decoupled using a capacitor from 10 to 33pF in parallel.