1. A 1.8 V 2.5 GHz PLL with on-chip charge pump-based supply regulation.pdf
2. A 20 GHz silicon germanium-HBT phase locked loop (PLL) for serial link applications.pdf
3. Generation of Accurate On-Chip Transconductances Using a MonoUthic CMOS PLL With Hybrid Analog and Digital Control.pdf
4. High speed submicron CMOS oscillators and PLL clock generators.pdf
5. Investigation of a multi-GHz single-chip CMOS PLL frequency synthesizer for wireless applications.pdf