Advanced Member level 4
I have designed an oscillator at 2.4G using GaAs HEMT to provide the negative resistance( designed o/p power was around 1dbm). But when I connect the Vds and Vgs, the transistor stops working after sometime. What could be the possible reasons for this? In one of the several tries, I could observe a peak in power spectrum at the designed frequency with just Vds connected, but when Vgs was connected the HEMT started drawing more current and the part was damaged.