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该论文提出了一种采用7位DAC和8抽头FFE的100Gb/s NRZ发射机，在40nm CMOS工艺中实现，解决了超短距离互连中高输出摆幅和更好信噪比的需求。通过DAC架构实现高分辨率FFE系数，最终输出眼图幅度达73mV。
satisfy the continuously growing demands for wireline communications [1-5]. Although PAM-4 signaling performs two-fold bandwidth efficiency compared with the NRZ counterpart, the NRZ signal still has the advantage in low-loss scenarios like ultra-short-reach (USR) interconnection for optical engines due to its high output swing and better SNR. This paper presents a 100Gb/s NRZ transmitter fabricated in 40nm CMOS by incorporating a 7b DAC with an 8-tap FFE implemented in DSP. The DAC-based architecture demonstrates high resolution for FFE coefficients, achieving an output eye diagram with 73mV eye height and 760fsrms jitter under 7.1dB loss at 50GHz while consuming 619mW of power from 1.1V/1.2V/1.5V supplies. Figure 6.8.1 illustrates the transmitter architecture with quarter-rate structure for
Pen-Jui Peng1, Sheng-Tsung Lai1, Wei-Hung Wang1, Chiang-Wei Lin1,
Wei-Chien Huang1, Ted Shih2 Yuan Ze University, Taoyuan, Taiwan 2 Teletrx, Taipei, Taiwan 1 Recently, PAM-4 transmitters have been realized at 112Gb/s or even faster to