Small signal output impedance, assuming linear and time invariant DUT,
can be measured by applying a stimulus across the converter output and
measuring the response at the same points.?? The stimulus and measurement
can be in the frequency domain by using a Vector Network Analyzer or
Frequency Response Analyzer or it can be done in the time domain by
applying a step-current stimulus and measuring the response with an
oscilloscope.?? in this latter case the time-domain response has to be
transformed into the frequency domain to get impedance versus
frequency.?? You can find measured illustrations for both in
http://www.electrical-integrity.com/Paper_download_files/DC18_PAPER_Track11_HowSpatialVariationofVoltage_Miranda_updated__.pdf
You can find very good accessories for the measurements on the Picotest
website: https://www.picotest.com/
Regards,
Istvan Novak
Samtec
On 7/1/2019 1:53 PM, agathon wrote:
Small-signal Zout measurement...------------------------------------------------------------------
This is the primary f-domain characterization of a SMPS.
What is the actual lab setup for this?
(I don't need brand/model instrument recommendations, but separately ok).
I assume the answer is something like ...
the feedback pin node has freq.-swept noise coupled into it and output V,I
are measured (with some nominal dc load). No?
Regards and Thanks.
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