A 10 Gb/s/pin Single-Ended Transmitter With Reflection-Aided Duobinary Modulation for Dual-Rank Mobile Memory Interfaces

The dual-rank configuration is one of the parallelization methods to increase the memory capacity for mobile applications. However, the stub mainly composed of the redistribution layer causes resonance reflections and its reflection interval reaches the bit period, which distorts signal and limits t...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2022-03, Vol.69 (3), p.1125-1134
Main Authors: Jeong, Yong-Un, Choi, Sungphil, Chae, Joo-Hyung, Yun, Jaekwang, Jeong, Shin-Hyun, Kim, Suhwan
Format: Article
Language:English
Subjects:
Applications programs
Distortion
Dual-rank mobile memory
duobinary signaling
Equalization
Feedforward control
Flight time
Frequency modulation
Impedance
memory interface
Memory management
Mobile computing
Modulation
Receivers
reflection
Transfer functions
transmitter
Transmitters
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The dual-rank configuration is one of the parallelization methods to increase the memory capacity for mobile applications. However, the stub mainly composed of the redistribution layer causes resonance reflections and its reflection interval reaches the bit period, which distorts signal and limits the signal bandwidth. A single-ended duobinary transmitter that utilizes the reflection is presented for dual-rank mobile memory interfaces where reflections dominate. The reflection is included in the transfer function for duobinary modulation, which allows the transmitter to have a wide eye opening and high energy efficiency. Two-tap reverse feed-forward equalization and slew-rate control are used to support the duobinary modulation in combination with the reflection. A prototype chip fabricated in a 65 nm CMOS process has an area of 0.0378 mm 2 and consumes 1.24 pJ/bit. It is verified at data rates of 8, 9 and 10 Gb/s/pin where the flight time of the 9 mm stub is 55.6 ps.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2021.3123753