August West
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I'll get up and fly away
Posts: 71
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The AC, SP, and noise analyses linearize the circuit about the DC operating point before calculating gain and noise. This mimics the situation where you are just applying a small input signal to compute the gain, or you are computing the noise with no input at all.
The PSS analysis allows you to apply a large signal; large meaning large enough to cause the LNA to distort. You can use this while sweeping the input power to compute the compression point. Or you can simply apply a large signal that represents an out-of-band blocker, and then perform a PAC, PSP, or PNoise analysis to compute the small-signal gain and noise in the presence of the large blocker.
The first set of analyses, AC, Noise, and SP are analyses that can be performed using Spectre or Spice. The second set, PSS and its small signal partners, PAC, PSP, and PNoise, require SpectreRF.
August
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