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Keywords = charge steering logic (CSL)

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11 pages, 5902 KiB  
Article
A 50 Gb/s 0.42 pJ/b Non-Return-to-Zero Transmitter for Extra-Short-Reach SerDes
by Lili Sun, Zhongxu Jin, Yanchao Liu, Xiaohua Yu and Ronghua Ni
Electronics 2025, 14(10), 1955; https://doi.org/10.3390/electronics14101955 - 11 May 2025
Viewed by 481
Abstract
An energy- and area-efficient non-return-to-zero (NRZ) transmitter with feedforward equalization (FFE) is proposed for an extra-short-reach (XSR) data interface in chiplet-based system in packages (SiPs) and multi-chip modules (MCMs). At the system level, the final-stage 2:1 multiplexer (MUX) in the transmitter is combined [...] Read more.
An energy- and area-efficient non-return-to-zero (NRZ) transmitter with feedforward equalization (FFE) is proposed for an extra-short-reach (XSR) data interface in chiplet-based system in packages (SiPs) and multi-chip modules (MCMs). At the system level, the final-stage 2:1 multiplexer (MUX) in the transmitter is combined with the driver to reduce the hardware and power consumption; at the circuit level, charge-steering-based moderate-swing signal processing further reduces the circuit power consumption and inter-symbol interference. Fabricated in a 28 nm CMOS process with a core area of 0.032 mm2, the prototype NRZ transmitter demonstrates an energy efficiency of 0.42 pJ/b at a data rate of 50 Gb/s with an insertion loss of 10 dB, which makes it a promising candidate for XSR die-to-die (D2D) interfaces. Full article
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