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The methods of modeling and measurement of switching converters
are discussed in this thesis. The average model is
very simple but is inaccurate when modulation frequencies
approach to one-half of the switching frequency. The discrete
model can accurately predict the modulation envelope of the
output voltage, but it is very complex. The discreteâ average
model combines both average and discrete modeling techniques
so that it possesses the advantages of both techniques. The
experimental results show the deficiency of analog modulation
technique for loop gain measurement under certain circumstances.
The digital modulator, on the other hand, always
provides accurate measurement data. The accuraqy of the
discrete-average model is verified by measurement data using
the digital modulator.