In simulation, just connect the drain and gate together for saturation operation, force a current of, and read the voltage value. Design Procedure ¶Ĭhoose a reasonable for stability of dc bias, this sets. We can just add a large enough capacitor across, so that is shorted out by the capacitor, as shown in figure 3. AC Operation Consideration of Feedback ¶įor an AC signal, we do not necessarily want the large negative feedback.Īssume we want all of the AC input voltage to appear across, without any drop over. The resistor is thus said to act as a negative feedback, as it negatively affects the increase of. Consequently, the resulting increase is less than the original increase from the increase, simply because. Figure 3: MOSFET amplifier with feedback resistor.
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