A 10-Gb/s Single-Loop Half-Rate DLL-Based Clock and Data Recovery Circuit for Forwarded-Clock Wireline Transceivers

Authors

Abdallah K. Mohamed, Teaching assistant at Electronics and Communications Engineering Department, Mansoura University, Mansoura, EgyptFollow
Sameh A. Ibrahim, Professor at the Electronics Engineering and Electrical Communications Department, Ain Shams University, Cairo, Egypt
Mohy Eldin A. Abo-Elsoud, Professor at the Electronics and Communications Engineering Department, Mansoura University, Mansoura, Egypt

Subject Area

Electronics and Communication Engineering

Article Type

Original Study

Abstract

This paper introduces a 10-Gb/s single-loop, half-rate delay-locked loop (DLL)-based clock and data recovery (CDR) circuit for forwarded-clock (FC) wireline transceivers. The proposed CDR employs a differential ring oscillator (RO) with sub-feedback loops structure for multi-phase clock generation with a single-loop operation. An Alexander phase detector utilizing a flip-flop based on an improved true single-phase clock (TSPC) logic with split outputs is adopted. The proposed DLL-based CDR is an optimized solution in terms of area and power for FC wireline transceivers. The recovered clock exhibits an RMS jitter of 590 fs and a peak-to-peak jitter of 3.8 ps. The circuit achieves a power consumption of 7.3 mW from a 1.2 V supply, resulting in a commendable power efficiency of 0.73 pJ/bit. The implementation of the proposed DLL-based CDR employs 65-nm CMOS technology, while occupying an active area of 0.0056 mm2

Keywords

Clock and data recovery (CDR), voltage-controlled delay line (VCDL), phase detectors, wireline transceivers.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.

Recommended Citation

Mohamed, Abdallah K.; Ibrahim, Sameh A.; and Abo-Elsoud, Mohy Eldin A. (2024) "A 10-Gb/s Single-Loop Half-Rate DLL-Based Clock and Data Recovery Circuit for Forwarded-Clock Wireline Transceivers," Mansoura Engineering Journal: Vol. 49 : Iss. 2 , Article 15.
Available at: https://doi.org/10.58491/2735-4202.3190