Ken Kundert
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PSS and its small-signal minion (PAC, PXF, PSTB, etc) can be used on switching amplifiers as well as switching regulators. PAC & PXF can be used to find things like small-signal output impedance and supply rejection. PSTB can be used to measure the loop gain of the amplifier. PNoise can be used to determine the noise performance. One can also use QPSS to measure distortion and Envelope Following to speed up a long transient analysis.
What is it that you are trying to measure?
-Ken
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