0.91 V reference, 3.3 ppm/°C Sub-BGR with second-order compensation and improved PSRR.

This work introduces the design and analysis of a Bandgap Reference (BGR) circuit with better temperature stability and reduced process variation. The second-order compensation method is implemented for design through an optimized error amplifier and a resistor network with a significantly better temperature coefficient performance. The startup mechanism is carefully designed for ensured strong and stable circuit performance under every variation of process-voltage-temperature (PVT).