A 7.15-to-7.95GHz Magnetically Enhanced Feedforward Waveform-Shaping CMOS Oscillator with Implicit Common-Mode Noise Cancellation Achieving -146.72dBc/Hz PN@1MHz and 190.6dBc/Hz FoM

📋 论文概要

本文提出了一种磁增强前馈波形整形CMOS振荡器，通过隐式共模噪声消除技术实现了超低相位噪声。在7.5GHz载波下，1MHz偏移处相位噪声达到-146.72dBc/Hz，FoM为190.6dBc/Hz，适用于量子计算和精密仪器等应用。

💡 主要创新点

• 采用磁增强前馈波形整形技术，改善振荡器相位噪声性能。
• 提出隐式共模噪声消除方法，在不增加额外功耗的情况下抑制共模噪声。

🏷 关键词

📄 原文摘要

Abstract Pure microwave sources are vital for precision instrumentation, but conventional schemes are bulky and costly. CMOS oscillators are inexpensive and compact yet limited by phasenoise performance. To address this, we present a magnetically enhanced, feedforward waveform-shaping oscillator with an implicit common-mode noise-cancellation technique. Measurements show −146.72dBc/Hz PN at a 1MHz offset and a 190.6dBc/Hz FoM at a 7.5GHz carrier. Ultra-low-phase-noise microwave sources are critical for applications such as quantum computing and precision instrumentation. Conventional solutions, including frequency synthesizers and dielectric-resonator oscillators, deliver excellent performance but are bulky, costly, and power hungry, making them unsuitable for large-scale or portable systems [1]. The CMOS technology, with its low cost, process maturity, and high integration capability, offers a promising alternative. However, achieving ultra-low phase noise in CMOS remains

👥 作者与机构

Rui Ma, Wei Deng, Haikun Jia, Juntao Lan, Zhihua Wang, Baoyong Chi

Tsinghua University, Beijing, China