An on-chip waveform capturer for diagnosing off-chip power delivery

In-place diagnosis of off-chip power delivery resonance is demonstrated with on-chip waveform capturer and power delivery network (PDN) exciter that were prototyped in a 65 nm CMOS technology. Oscillatory waveforms are captured after the excitation of PDN, from which an LCR lumped equivalent circuit of PDN seen by on-chip circuits is algorithmically derived. The consistency of component values is confirmed among the demonstrated in-place diagnosis and full-wave analysis.