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Title:Low-power and energy-efficient wireline receivers
Author(s):Kim, Dongwook
Director of Research:Hanumolu, Pavan Kumar
Doctoral Committee Chair(s):Hanumolu, Pavan Kumar
Doctoral Committee Member(s):Schutt-Ainé, José E.; Zhou, Jin; Dragic, Peter D.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):CDR, Receiver
Abstract:The exponential growth of data processing, ranging from edge devices to cloud computing, requires low-power and energy-efficient wireline data communication. This dissertation proposes innovative ways to accomplish such communication focusing on the receiver side. The first half of the dissertation discusses improving the power efficiency of the receiver, and the second half discusses improving the energy efficiency of the receiver considering the link on/off operation. The first contribution is a novel way of designing a clock and data recovery (CDR) circuit in the receiver. A sub-baud-rate CDR that can recover clock and data using only differential quarter-rate clocks is presented. A combination of eight samplers and an integrator recovers four data bits in each clock cycle. Four of the eight samplers are reused for phase detection as well as for background calibration to improve the robustness of the CDR to process, voltage, and temperature variations. A continuous-time linear equalizer (CTLE) is used to compensate for intersymbol interference (ISI). The CDR prototype fabricated in 65 nm CMOS recovers 15.2 Gb/s data using only differential 3.8 GHz clock and achieves total power consumption of 29 mW, which translates to the energy efficiency of 1.9 pJ/bit with bit error rate (BER) less than 10^-12. The second contribution is a robust way of rapidly powering on/off the receiver. The rapid on/off (ROO) operation helps scale power in accordance with link utilization. A baud-rate ROO receiver that can turn on in just 10 ns is presented. A novel baud rate CDR reduces power consumption additionally.
Issue Date:2019-12-03
Rights Information:Copyright 2019 Dongwook Kim
Date Available in IDEALS:2020-03-02
Date Deposited:2019-12

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