Abstract
Mobile DRAMs are essential to support memory-intensive operations for smartphones and tablet PCs [1, 2]. Since mobile DRAM standard (LPDDR), for the next generation, targets the speed specification of 51.2GB/s, its I/O interface demands high bandwidth, low power and high efficiency. Single-ended signaling has been used for LPDDR interfaces due to 100% pin efficiency. However, as the data rate increases simultaneous switching noise (SSN) limits the bandwidth. Although differential signaling can effectively remove SSN, it suffers from a pin efficiency drop of 50%, requiring that the signal bandwidth be doubled. To address this issue, differential coding schemes that encode signals over multiple channels have been explored to achieve pin efficiency and SSN robustness [4]. This paper presents a 1V 15.6Gb/s C-PHY transceiver using tri-level signaling that consumes only 7.8mW, resulting in an energy-efficiency of 0.5pJ/b. Such a high efficiency is achieved by the use of a tri-level signaling, which is from C-PHY encoding scheme of MIPI alliance standards, in combination with an active-ground tri-level transmitter and a crosstalk-cancelled low-power receiver.
Original language | English |
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Title of host publication | 2017 IEEE International Solid-State Circuits Conference, ISSCC 2017 |
Editors | Laura C. Fujino |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 402-403 |
Number of pages | 2 |
ISBN (Electronic) | 9781509037575 |
DOIs | |
Publication status | Published - 2017 Mar 2 |
Event | 64th IEEE International Solid-State Circuits Conference, ISSCC 2017 - San Francisco, United States Duration: 2017 Feb 5 → 2017 Feb 9 |
Publication series
Name | Digest of Technical Papers - IEEE International Solid-State Circuits Conference |
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Volume | 60 |
ISSN (Print) | 0193-6530 |
Other
Other | 64th IEEE International Solid-State Circuits Conference, ISSCC 2017 |
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Country/Territory | United States |
City | San Francisco |
Period | 17/2/5 → 17/2/9 |
Bibliographical note
Funding Information:This research was supported by the Ministry of Science, ICT and Future Planning, Korea, under the "ICT Consilience Creative Program" (IITP-R0346-16-1008) supervised by the IITP.
Publisher Copyright:
© 2017 IEEE.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering