Journal
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
Volume 31, Issue 2, Pages 188-198Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVLSI.2022.3229342
Keywords
Phase locked loops; Voltage-controlled oscillators; Jitter; Very large scale integration; Topology; Clocks; Capacitors; CMOS; figure-of-merit (FOM); harmonic-rich voltage-controlled oscillator (VCO); integrated jitter; phase-detection gain (KPD); reference (REF) feedthrough suppression; sampling phase-locked loop (S-PLL); type-I; type-II
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This article presents a low-jitter and low-spur type-II sampling phase-locked loop (S-PLL). The introduction of a differential parallel-series double-edge sampling phase detector (S-PD) achieves a high phase-detection gain and reduces the S-PLL in-band phase noise (PN). The proposed S-PLL, implemented in a 65-nm CMOS, operates at 3.6 GHz and has an integrated jitter of 43.1 fsrms integrated from 1 kHz to 100 MHz, as well as a jitter-power figure-of-merit (FOM) of -258.7 dB. The measured reference (REF) spur is -80.34 dBc at f(REF) and -75.17 dBc at 2 f(REF), respectively.
This article presents a low-jitter and low-spur type-II sampling phase-locked loop (S-PLL). The innovative introduction of a differential parallel-series double-edge sampling phase detector (S-PD) achieves a high phase-detection gain and reduces the S-PLL in-band phase noise (PN). Incorporating a transformer-based harmonic-rich shaping voltage-controlled oscillator (VCO), the proposed S-PLL prototyped in a 65-nm CMOS, operates at 3.6 GHz and scores an integrated jitter of 43.1 fsrms integrated from 1 kHz to 100 MHz, it also exhibits a jitter-power figure-of-merit (FOM) of -258.7 dB. The measured reference (REF) spur is -80.34 dBc at f(REF) and -75.17 dBc at 2 f(REF), respectively.
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