200 MHz Cascade Amplifier

The 200 MHz JFET has same features below:
1. Low crossmodulation
2. Large-signal handling ability
3. No neutralization
4. AGC controlled by biasiing the upper cascade JFET.

Here’s the circuit diagram:

The Idss of the upper unit must be greater than the lower unit, that’s the only special requirement of the 200 MHz JFET. [Source: National Semiconductor Application Note]