JSSC 2022第1期RF & Wireless10nm FinFETDACEqualizer

A 224-Gbs DAC-Based PAM-4 Quarter-Rate Transmitter With 8-Tap FFE in 10-nm FinFE

一款基于DAC的224Gb/s PAM-4四分之一速率发射机，采用10nm FinFET工艺，具有8抽头FFE和低抖动时钟分布网络。

224Gb/s, 65fs rms随机抖动, 1.0Vppd输出摆幅, 1.88pJ/b能效

PAM-4数字模拟转换器前馈均衡器时钟分布网络高速串行接口

▸7位电压DAC驱动器和数字8抽头前馈均衡器

▸28GHz电感峰化时钟分布网络

▸4:1脉冲数据串行化架构

Abstract

This article presents analysis, design details, and measurement result of a 224-Gb/s four-level pulse amplitude modulation (PAM-4) transmitter (TX) consisting of a 7-bit voltage digital-to-analog converter (DAC) driver, digital 8-tap feed- forward equalizer (FFE), and a 28-GHz inductively peaked clock distribution network. The TX DAC uses quarter-rate clocking with a 4:1 pulse-based data serialization architecture. Design techniques for generating and distributing low-jitter CMOS clocks up to 29