Table 3: Performance comparison.

Reference [8]’s FA frequency synthesizerReference [19]’s two-path FA synthesizerReference [20]’s two-path FA synthesizerReference [23]’s two-path ADPLL This work

Process0.6 μm, 3.3 V0.18 μm, 1.8 V0.18 μm, 3.3 V0.13 μm, 1.3 V0.18 μm, 1.8 V

Area (flying-adder)1350 μm × 1260 μm400 μm × 400 μm690 μm × 630 μm300 μm × 300 μm295 μm × 353 μm

Output frequency range57.27 MHz ~ 130 MHz39.38 MHz ~ 226 MHz62 KHz ~ 62.5 MHz10 MHz ~ 500 MHz33 MHz ~ 286 MHz

Accumulator width 32 bits11 bits 11 bits29 bits

Power consumption (multiphase PLL)~40 mW3.6 mW32.4 μW28.2 mW ( I / O pads: ~14 mW, core:14.2 mW)

Power consumption (flying adder)~150 mW

Peak-to-peak jitter1132 ps at 120.05 MHz130 ps at 187.5 MHz410 ps288 ps at 191.4 MHz215.2 ps at 286 MHz

RMS jitter165 ps at 120.05 MHz50 ps at 187.5 MHz39 ps at 191.4 MHz40.2 ps at 286 MHz

FoM(GHz/W)0.6317.818.2