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Content Provider | Directory of Open Access Journals (DOAJ) |
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Author | Joo-Hyung Chae Yong-Un Jeong Byung-Du Choi |
Abstract | Herein, the analog-based, 2-tap feed-forward equalization (FFE) voltage-mode transmitter using dual supply/ground voltage regulation is presented. In an FFE data modulator, the data are divided into transition and non-transition segments, and are transmitted to the main- and post-tap drivers. By using dual voltage regulation, flexible FFE strength adjustment is possible without process dependency, and the short-current path is eliminated, thus improving the overall energy efficiency. Furthermore, this structure with independent impedance calibration loops has good on-resistance and return loss characteristics, thereby securing signal integrity. In addition, by regulating the supply/ground voltages, the output swing and common-mode voltage can be adjusted independently. Therefore, our transmitter can serve multiple standards and channel environments with a single design. To verify the effectiveness of our method, we designed a prototype of the source-synchronous transmitter in a 65 nm CMOS process, and its performance was compared with that of a conventional FFE design. The simulation results show that the proposed design has better on-resistance, return loss, and FFE controllability, and it has an energy efficiency of 2.23 pJ/bit at 20 Gb/s. |
e-ISSN | 21693536 |
DOI | 10.1109/ACCESS.2022.3164742 |
Journal | IEEE Access |
Volume Number | 10 |
Language | English |
Publisher | IEEE |
Publisher Date | 2022-01-01 |
Publisher Place | United States |
Access Restriction | Open |
Subject Keyword | Electrical Engineering. Electronics. Nuclear Engineering Voltage-mode Driver Feed-forward Equalization Impedance Calibration Serial Link Return Loss On-resistance |
Content Type | Text |
Resource Type | Article |
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