Signal Integrity Journal Webinar Series

Title: Boost Your MIPI® C-PHY™ Simulation Accuracy with the Keysight EDA Waveform Source Model

Date: August 27, 2025

Time: 8am PT / 11am ET

Sponsored by: Keysight Technologies

Presented by: Seok Keun Choi, Product Owner and Fangyi Rao, Master Engineer, Keysight

Abstract:
One of the key challenges in the mobile industry is integrating more technologies into limited space. With the rise of foldable smartphones and VR headsets, display and camera interfaces now require higher data throughput over fewer lines. To address this, the MIPI Alliance introduced C-PHY, a new physical layer developed alongside D-PHY. C-PHY enables higher data rates with fewer wires, making it widely adapted in camera interfaces and increasingly used in displays.

To keep pace with these changes, it’s become critical to accurately analyze and implement the MIPI C-PHY interface before tape-out or prototyping. However, due to the multi-level single-ended signaling used by MIPI C-PHY transmitter (TX), traditional IBIS models are no longer sufficient to represent the C-PHY TX behavior. A new approach is needed, one that can capture silicon-level signal details.

Keysight, working closely with industry-leading customers, has developed a new model method for modeling the C-PHY transmitter properly. This new approach aims to meet the needs of engineers looking to simulate MIPI C-PHY more effectively and accurately.

In this session, we’ll share the limitations of traditional IBIS models for C-PHY, explain how the Keysight Waveform Source model serves as an alternative, and show how to build a waveform source model for accurate C-PHY simulation.

Presenter Bios:
Seok Keun (SK) Choi is the HSD (High-Speed Digital) CircuitSim product owner in the Keysight EDA group at Keysight Technologies. SK has over 20 years of experience in High-Speed Digital applications. He has held several positions at Keysight Technologies, including Oscilloscope Product Manager, MIPI Pyramid Lead, and Application Engineer for HSD, cloud, and automation. SK began his career in mobile phone research and development at Samsung Electronics.

Fangyi Rao is a master R&D engineer at Keysight Technologies. He received his B.S. degree from University of Science and Technology of China and Ph.D. degree from Northwestern University, both in theoretical physics. He joined Agilent/Keysight EESoft in 2006 and works on Analog/RF and SI simulation technologies in ADS. From 2003 to 2006 he was with Cadence Design Systems, where he developed SpectreRF Harmonic Balance technology and high order perturbation analysis method for nonlinear circuits. Prior to 2003 he worked in the areas of EM simulation, nonlinear device modeling, and medical imaging.

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