A 16-Gb/s NRZ Receiver with 0.0019-pJ/bit/dB 1-Tap Charge-Redistribution DFE

Jonghyuck Choi, Yoonjae Choi, Hyunsu Park, Jincheol Sim, Youngwook Kwon, Seungwoo Park, Seongcheol Kim, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review


In this brief, a 16-Gb/s receiver with a chargeredistribution decision-feedback equalizer (CR DFE) is presented. The proposed CR DFE does not suffer from a voltage headroom issue because it uses charges on the capacitors rather than the current source. Hence, the power consumption is significantly reduced compared with the current-steering DFE. In addition, as the CR DFE tracks the signal and immediately compensates for the inter-symbol interference (ISI), the DFE loop delay is minimized. The equalized output maintains the input commonmode voltage level and signal swing. The CR DFE core fabricated in a 28-nm CMOS technology consumes only 0.38 mA from a 1-V supply at 16 Gb/s and compensates for a 12.5-dB ISI channel. An FoM of 0.0019 pJ/bit/dB was achieved, which is significantly better than the state-of-the-art technologies.

Original languageEnglish
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Publication statusAccepted/In press - 2022


  • Capacitors
  • Clocks
  • Decision feedback equalizers
  • Delays
  • Gain
  • Receiver (RX)
  • Switches
  • Voltage
  • charge redistribution
  • charge-steering logic
  • decision-feedback equalizer (DFE)
  • differential signaling
  • equalizer (EQ)
  • inter-symbol interference (ISI)
  • non-return-to-zero (NRZ)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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