四川轻化工大学学报：自然科学版

在高速串行通信速率持续提升的场景下，传统低压差分信号（LVDS）驱动电路会因共模电平偏移与高频传输衰减的共同作用，出现严重的信号抖动问题。为此，基于65nm CMOS工艺设计了一种低抖动LVDS驱动电路。该工艺通过对比分析传统LVDS 驱动器结构，采用性能更优的双电流源驱动架构，并集成了共模反馈电路与预加重电路。共模反馈电路依托带隙基准电路输出的稳定参考电压，可实现对输出共模电平的精准钳位；预加重电路则通过开关逻辑控制加速信号电平翻转，以此补偿传输过程中的高频分量损失，最终达到减小信号抖动的效果。在2Gbps伪随机编码输入、2.5V 电源电压、TT 工艺角、负载电容2pF的条件下进行仿真，结果表明该电路实现了15.46ps的低峰峰值抖动，输出摆幅385mV，功耗6.9Mw/Gbps，与现有同类设计相比，本文电路的峰峰值抖动较多数设计降低61.35%以上，功耗水平略优于其他同类低压差分信号驱动电路，各项指标均满足ANSI/TIA/EIA-644标准要求。

In the scenario of continuous increase in high-speed serial communication rate， traditional low-voltage differential signaling (LVDS) driver circuits will suffer from severe signal jitter due to the combined effect of common-mode level offset and high-frequency transmission attenuation. To address this issue， a low-jitter LVDS driver circuit is designed based on the 65 nm CMOS process. By comparatively analyzing the structures of traditional LVDS drivers， this design adopts a dual current-source driving architecture with better performance， and integrates a common-mode feedback circuit and a pre-emphasis circuit. The common-mode feedback circuit relies on the stable reference voltage output by the bandgap reference circuit to achieve precise clamping of the output common-mode level. The pre-emphasis circuit accelerates signal level flipping through switch logic control， so as to compensate for the high-frequency component loss during transmission and ultimately achieve the effect of reducing signal jitter. Simulations are carried out under the conditions of 2 Gbps pseudo-random code input， 2.5 V power supply voltage， TT process corner， and 2 pF load capacitance. The results show that the circuit achieves a low peak-to-peak jitter of 15.46 ps， an output swing of 385 mV， and a power consumption of 6.9 mW/Gbps. Compared with existing similar designs， the peak-to-peak jitter of the proposed circuit is reduced by more than 61.35% compared with most designs， and its power consumption performance is slightly better than other similar LVDS driver circuits. All indicators meet the requirements of the ANSI/TIA/EIA-644 standard.