JSSC 2008第3期Clocking & PLLs90nmVCONeural Network Accelerator

20-GHz Quadrature Injection-Locked LC Dividers With Enhanced Locking Range

通过跨导耦合提升锁定范围的20GHz正交注入锁定LC分频器

90nm CMOS, 1.2V, 6.4mW, 20GHz输入, 10GHz输出

注入锁定LC分频器跨导耦合正交信号锁定范围

▸创新点1：采用跨导耦合技术显著提升锁定范围（电路创新）。通过引入跨导耦合，Miller拓扑的锁定范围从20.9%提升至25.3%，LC VCO拓扑从12.9%提升至18.1%，验证了该方法的有效性。

▸创新点2：理论分析与电路仿真结合验证跨导耦合效果（方法创新）。通过建立理论模型和仿真实验，系统分析了跨导耦合对锁定范围的影响机制，为设计优化提供了理论依据。

▸创新点3：对比两种拓扑结构（Miller与LC VCO）的性能差异（系统创新）。实验结果表明，Miller拓扑在锁定范围（25.3%）和功耗（6.4mW）方面均优于LC VCO拓扑，为高频分频器设计提供了拓扑选择依据。

▸创新点4：基于90nm CMOS工艺实现20GHz高频分频器（工艺创新）。在1.2V低电压供电下，两种拓扑均实现6.4mW低功耗，展示了该设计在先进工艺下的可行性与能效优势。

Abstract

Quadrature injection-locked LC dividers with either a Miller topology or an injection-locked LC VCO topology are coupled with transconductors to enhance their locking range. The effect of the transconductance coupling is analyzed theoretically and through circuit simulation. Both topologies were fabricated by 90-nm CMOS technology with a target input center frequency of 20 GHz and output frequency of 10 GHz. The measured locking range for the Miller topology with transconductance coupling is 25.