A PVT Validation Phase-Lock Loop with Multi-Band VCO Applied in Closed-Loop FOGs

Abstract

This work presents a phase-lock loop (PLL) applied in closed-loop fiber-optic gyroscope (FOG) systems. Multi-band VCO not only reduces the gain of VCO and the corresponding jitter, but also resists PVT (process, voltage, temperature) variation to meet the automobile grade demand. The proposed PLL is realized by TSMC 40nm CMOS process to demonstrate 9 transfer functions selected by thermometer codes, where the worst case P2P (peak-to-peak) jitter is 15 ps at 0.99V, 100°C, FF corner by all-PVT-corner post-layout simulations.