Rebecca Coath from Rutherford Lab, UK published a summary of pixel architectures and PTC, probably extracted from Albert Theuwissen's Advanced Imaging Course. A nice 17-slide presentation clearly and compactly describes pixel architectures from 4T to 7T and how to interpret their performance from PTC measurements. There are pdf and ppt versions of the presentation.
Update: The files have been removed from CERN by Rutherford Lab request, see comments.
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