Abstract
This paper proposes a new type of delay line locking mechanism with digitally controlled charge transfer. Delay-locked loop (DLL) based on the presented method features multi-phase outputs and is stepwise driven towards lock by a co-action of 1-bit Time-to-Digital Converters and revised charge-pump. On-chip pulse “slicing” arrangement provides high-rate clock for the Digital Signal Processing algorithm, enabling fine-tuninig of the proposed DLL. Locking mechanism is implemented with standard digital cells and complete mixed-signal design is simulated in 28nm ST CMOS with full physical device models to prove functionality. When locked to reference frequency of 1.25GHz, this design consumes 1.1mW from 1V supply and produces 64+64 12ps-spaced output phases with <176fsPP phase error ripple and 50dB SFDR.
Original language | English |
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Title of host publication | 2017 IEEE International Symposium on Circuits and Systems (ISCAS) Proceedings |
Publisher | IEEE |
Pages | 1806-1809 |
ISBN (Electronic) | 978-1-4673-6853-7 |
DOIs | |
Publication status | Published - 28 Sep 2017 |
MoE publication type | A4 Article in a conference publication |
Event | IEEE International Symposium on Circuits and Systems - Marriot Waterfront, Baltimore, United States Duration: 28 May 2017 → 31 May 2017 http://ieeexplore.ieee.org/document/8050249/ |
Publication series
Name | IEEE International Symposium on Circuits and Systems proceedings |
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ISSN (Electronic) | 2379-447X |
Conference
Conference | IEEE International Symposium on Circuits and Systems |
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Abbreviated title | ISCAS |
Country/Territory | United States |
City | Baltimore |
Period | 28/05/2017 → 31/05/2017 |
Internet address |