资料介绍
Stability_GainCircles_F03ADS Tutorial
Stability and Gain Circles ECE145A/218A
The examples in this tutorial can be downloaded from xanadu.ece.ucsb.edu/~long/ece145a as the file: stab_gain.zap
The first step in designing the amplifier with the S parameter method is to determine whether the transistor is unconditionally stable or potentially unstable. This can be easily estimated using the K stability factor and delta. The amplifier will be unconditionally stable if: K > 1 and mag() < 1. These factors are easily calculated using Measurement Equations in the ADS schematic panel. K is pre-programmed in as StabFact which can be selected from the S-parameter palette on the left. Delta can be programmed yourself using a blank MeasEqn. The maximum available gain (MAG) and maximum stable gain (MSG) can also be calculate
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