Re:Exploring Power Distribution Networks
by hollandays on Friday March 31, 2023 @07:24PM
(#35395142)
You ask good questions so I'll give very short "answers" to get you started in your search for good explanations.
The tests are frequency sweeps, one frequency at a time over multiple frequencies. Linear models can be decomposed into individual sine waves via Laplace/Fourier transform, so it's valid as long as the model is valid. The input voltage looks like a DC (bias) plus ripple (RF). The frequency response of some capacitors depends strongly on the DC bias (the trap), and flips to being inductive above the self-resonant frequency (SRF). Good test equipment is expensive, but there are options for hobbyists. One test like that can't predict the response for all inputs and conditions, so you need a model of the dynamics.
The tests are frequency sweeps, one frequency at a time over multiple frequencies. Linear models can be decomposed into individual sine waves via Laplace/Fourier transform, so it's valid as long as the model is valid. The input voltage looks like a DC (bias) plus ripple (RF). The frequency response of some capacitors depends strongly on the DC bias (the trap), and flips to being inductive above the self-resonant frequency (SRF). Good test equipment is expensive, but there are options for hobbyists. One test like that can't predict the response for all inputs and conditions, so you need a model of the dynamics.