一个优化的DCO与修改的二进制加权DCTLs基于E频段DPLL的混合调银行
Lu Tang1, Zichuan Yu2, Yujia Lu2
1Engineering Research Centre of RF-ICs & RF-systems, Ministry of Education, Southeast University, Nanjing, 210096, China. lutang2k@seu.edu.cn.
Scientific reports
|January 10, 2024
概括
这项研究介绍了一种优化的毫米波数字控制振荡器 (DCO),使用修改过的传输线路来提高性能. 新的设计实现了广泛的调范围和减少模具大小,提高了效率.
科学领域:
- 电气工程 电气工程
- 集成电路设计 集成电路设计
背景情况:
- 毫米波 (mmWave) 系统需要高效和紧的频率源.
- 传统的数字控制振荡器 (DCO) 在平衡芯片大小,调分辨率和相位噪声方面面临着挑战.
研究的目的:
- 在40nmCMOS工艺中呈现优化的毫米波DCO.
- 为了提高调精度,模具大小和相位噪声性能.
- 为了实现芯片大小,共振频率,调分辨率和相位噪声之间的更好的妥协.
主要方法:
- 利用修改后的二进制加权数字控制输电线 (DCTL) 进行粗和中调.
- 用开关电容器取代DCTL的最低重量位,以增强中等调.
- 实现了一个二进制加权交换电容阵列,并配备一个低合变压器进行微调.
主要成果:
- 实现了76-81 GHz的调范围.
- 将粗调和中调模块的总长度减少了34.4% (从122μm减少到80μm).
- 获得了190.52dBc/Hz的优点 (FoM) 数字,模具尺寸为0.12mm2.
结论:
- 优化的DCO设计提供了性能指标的卓越平衡.
- 修改后的DCTL和开关电容阵列有助于降低复杂性和提高效率.
- 这项工作提供了适合先进应用的紧且高性能毫米波DCO.
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