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Single-Ended PAM-4 Transmitters With Data Bus Inversion and ZQ Calibration for H
提出一种采用PAM-4调制、数据总线反转和ZQ校准的单端DRAM接口发射机设计，提升能效并降低噪声。
38 Gb/s, 26.16 mW, 0.688 pJ/bit
PAM-4数据总线反转ZQ校准单端发射机DRAM接口
▸采用PAM-4调制与数据总线反转(DBI)技术降低功耗
▸电容耦合前馈均衡器(CC-FFE)减轻码间干扰
▸基于片上电阻的ZQ校准方法精确调整输出阻抗
Abstract
This article presents the use of pulse ampli-
tude modulation four-level (PAM-4) transmitters (TXs) with
pseudo-open drain (POD) termination for single-ended dynamic
random access memory (DRAM) interfaces. To address the issues
of increased power consumption and susceptibility to noise due to
reduced signal-to-noise ratio (SNR), the use of data bus inversion
(DBI) is implemented and investigated. By adopting the DBI
technique in PAM-4 signaling, the driver power and supply
fluctuations can be mi