A DDR5 Interposer De-embedding Method Based on Transfer Function

A novel method for DDR interposer de-embedding is introduced in this article, utilizing transfer function and microwave network theory. The de-embedding transfer function is computed and then convolved with the waveform measured at the probe tip of the interposer to restore the waveform at the DRAM ball. The interposer is characterized as a 3-port network, and its parasitic effects can be entirely eliminated using the proposed technique. The accuracy of this method is assessed through validation in the time domain simulations.