Stabilizing a GaN device
Hello Everyone!
I am working on an amplifier design and cannot stabilize a GaN discrete transistor. I have tried everything from resonance networks at the gate, to feedback but the device shows instability at 10 and 20MHz.
My design working bandwidth is from 1GHz to 5GHz. I was thinking of ignoring the stability, but this might mix up to the band of operation, especially if I plan to subject the device to modulation signals.
The screenshot above is the same transition with an RC tank at the gate employing C= 1pf and R = 300 ohms
I would appreciate it if someone could recommend stabilization techniques that might work.
Happy Holidays!!