pancho_hideboo wrote on Oct 2nd, 2010, 10:46pm:As another possibility, unless impedance of Vdd is enough low, extraordinal oscillation could occur between Vdd and drain of M2.
Then it breaks drain of M2.
Try to place 10pF, 100pF, 1000pF and 100kohm between Vdd and Gnd.
I have question
You mean place all 10pF, 100pF, 1000pF and 100kohm in parralel? or place just one by one, and test?
My frequency is wideband, from 1.8~2.7Ghz.
From VDD to ground, when I place the capacitor, which value should I choose?