A 2-to-20 GHz Multi-Phase Clock Generator with Phase Interpolators Using Injection-Locked Oscillation Buffers for High-Speed IOs in 16nm FinFET

To support high-speed IOs, a 2-to-20 GHz cross-coupled inverter-based multi-phase PLL with phase interpolators using injection-locked oscillation buffers is presented. The proposed voltage-controlled oscillator (VCO) is made of two 4-stage ring oscillators (RO), where the introduction of feedback an...

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Bibliographic Details
Published in2019 IEEE Custom Integrated Circuits Conference (CICC) pp. 1 - 4
Main Authors Song, Sanquan, Poulton, John, Chen, Xi, Zimmer, Brian, Tell, Stephen G., Turner, Walker J., Kudva, Sudhir S., Nedovic, Nikola, Wilson, John, Gray, C. Thomas, Dally, William J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2019
Subjects
clocking
Clocks
injection-locked oscillation
Inverters
phase locked loop
Phase locked loops
Resistors
Voltage control
voltage-controlled oscillator
Voltage-controlled oscillators
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Summary:To support high-speed IOs, a 2-to-20 GHz cross-coupled inverter-based multi-phase PLL with phase interpolators using injection-locked oscillation buffers is presented. The proposed voltage-controlled oscillator (VCO) is made of two 4-stage ring oscillators (RO), where the introduction of feedback and cross-coupled resistances enable the VCO to run at higher speeds compared to a conventional 4-stage RO. Injection-locked oscillation buffering is proposed to restore swing and reduce duty-cycle error (DCE) for VCO output buffers and PIs. Fabricated in 16nm process, it runs 25% faster and consumes 20% less power than prior works, with less than 1.8% DCE at 20 GHz across PI code range.
ISSN:2152-3630
DOI:10.1109/CICC.2019.8780177