汽车微控制器8路10Gbps发射机的设计

Andrea Bandiziol, W. Grollitsch, F. Brandonisio, R. Nonis, P. Palestri
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引用次数: 7

摘要

本文介绍了一种用于汽车电子控制单元的10gbps串行接口发射机的设计。选择数据速率是为了评估该频率下汽车环境中的设计挑战。重点将主要集中在使用标准28纳米技术的晶体管级设计方面的挑战,但也将给出系统级概述。提出的发射机具有8个抽头(1个前光标和6个后光标,加上主抽头)的前馈均衡,其强度可通过16个离散步骤进行编程,优化了发射机的适应性,减少了面积。所提出的架构也能够调整其输出阻抗独立于均衡抽头的权重的选择。它具有300 mV峰对峰眼图和16个均衡电平,实现了非常低的2.25 pJ/bit总功耗(预驱动器+驱动器为0.633 pJ/bit)。
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Design of a 8-taps, 10Gbps transmitter for automotive micro-controllers
This work describes the design of a transmitter for a 10 Gbps serial interface to be used in automotive Electronic Control Units. The data rate is chosen in order to assess the design challenges in automotive environment at this frequency. The focus will be mainly on challenges related to transistor level design using a standard 28 nm technology, nevertheless a system level overview will be also given. The proposed transmitter features feed-forward equalization with 8 taps (1 pre-cursor and 6 post-cursors, plus the main tap), whose strength is programmable with 16 discretization steps, optimizing the transmitter adaptability with reduced area. The proposed architecture is also able to tune its output impedance independently from the choice of the weights of the equalization tap. It features a 300 mV peak-to-peak eye diagram with 16 equalization levels and achieves a remarkably low 2.25 pJ/bit total power consumption (0.633 pJ/bit for the predriver+driver).
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