STABILITY OF GRID AMPLIFIERS

We present a stability model for quasi-optical grid amplifiers. This m odel is useful for predicting and suppressing the common-mode oscillat ions that often occur in amplifier grids. Three stabilization techniqu es will be discussed. The first technique uses a capacitor to stabiliz e the grid. The second approach employs resistance to suppress the osc illations, The final technique stabilizes the grid by reducing the on- chip common-mode resistance, allowing greatly increased amplifier effi ciencies. Experimental evidence will be presented to confirm the valid ity of our stability model.