A 990- $\mu\hbox {W}$ 1.6-GHz PLL Based on a Novel Supply-Regulated Active-Loop-Filter VCO

A low-power 1.6-GHz phase-locked loop (PLL) based on a novel supply-regulated voltage-controlled oscillator (SR-VCO) including an active-loop filter (ALF) is realized. In this PLL, an active RC filter is combined with SR-VCO, achieving the advantages of ALF PLL without penalties in power consumption or phase noises. The PLL has measured rms jitter of 4.82 ps, and its core consumes 990 μW from 1-V supply while the chip area is 420 × 570 μm² including on-chip passive components required for the ALF and the supply regulator.