Xun recently successfully designed and tested her latest prototype test-chip. The work will be presented in the upcoming ISSCC conference in February.
Xun's latest work revolves around developing the idea of computational control that we have been exploring, and applying it to Low Dropout Regulators for starters. The idea is to construct accurate time-domain state-equations of systems and solve them efficiently at runtime to yield systems with enhanced transient response and stability. The work also demonstrates how low-complexity statistical analysis (1-bit precision) can be used to auto-tune system parameters to compensate for PVT variation, typically a source of much of the required margining that is done in digital LDOs in particular.