| Title |
A 0.1-3 GHz Wide Bandwidth Ring VCO Fractional-N PLL with Phase Interpolator in 8 nm FinFET CMOS |
| Authors |
(Taek-Joon An) ; (Ook Kim) ; (Jeong-Mi Park) ; (Jin-Ku Kang) |
| DOI |
https://doi.org/10.5573/JSTS.2024.24.5.440 |
| Keywords |
Fractional-N frequency synthesizer; phase interpolator; multi-modulus divider (MMD); phase-locked loops (PLLs); ring oscillator |
| Abstract |
This paper proposes a multi-phase ring oscillator based fractional-N phase locked loop (FNPLL) frequency synthesizer using phase interpolator for high-speed serial link. This paper aims to reduce quantization noise by employing sub-integer divider, extending PLL bandwidth. Fabricated in 8 nm CMOS process, the proposed FNPLL operates over wide frequency range of 0.1-3 GHz. The proposed FNPLL achieves 1.49 ps rms integrated jitter at 3 GHz output. The proposed FNPLL achieves wide BW up to 2 MHz using a 25 MHz reference clock. |