A 7-bit 7-GHz multiphase interpolator-based DPC for CDR applications
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Date
2022-07-21
Authors
Khanghah, Meysam M.
Sadeghipour, Khosrov D.
Kelly, Denis
Antony, Cleitus
Ossieur, Peter
Townsend, Paul D.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
This paper presents a 7-bit digital to phase converter (DPC) for high speed clock and data recovery (CDR) applications which is capable of generating multi-phase clocks at 7-GHz frequency. Fabricated in a standard 65-nm CMOS technology, the design introduces a modified phase interpolator (PI) and a quadrature phase corrector (QPC) to reduce the effect of the circuit imperfections on the DPC's resolution and linearity. Employing a 14-GHz quadrature reference clock, the DPC achieves DNL/INL of 0.7/6 LSB respectively while consuming 40.5 mW power from 1.05 V supply.
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Keywords
Digital to phase converter (DPC) , Clock and data recovery (CDR) , Phase interpolator (PI) , Wireline and optical communication
Citation
Khanghah, M. M., Sadeghipour, K. D., Kelly, D., Antony, C., Ossieur, P. and Townsend, P. D. (2022) 'A 7-bit 7-GHz multiphase interpolator-based DPC for CDR applications', IEEE Transactions on Circuits and Systems I: Regular Papers. doi: 10.1109/TCSI.2022.3191229.
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