使用增强型宽带谐波整形技术的 63-89 kHz 1/f³ 相位噪声角 QVCO

0 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE microwave and wireless technology letters Pub Date : 2024-09-09 DOI:10.1109/LMWT.2024.3436868

Zhan Qu;Ya Zhao;Ge Gao;Chao Fan;Feng Liang;Li Geng

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引用次数: 0

摘要

本文介绍了一种正交压控振荡器（QVCO），该振荡器利用增强型宽带谐波整形技术来改善相位噪声（PN）并降低 1/{f}$ PN 角。^{3}$ PN 角。具体来说，我们的 QVCO 采用三线圈磁耦合来产生正交相位，此外还增强了共模（CM）阻抗和谐波电压，并有助于形成明确的 CM 电流返回路径，从而改善 PN 并降低闪烁噪声上变频。此外，头部谐振器（HR）可实现宽带谐波整形操作，无需手动进行二次谐波校准。QVCO 采用 55 纳米 CMOS 实现，核心面积为 0.362 平方毫米。在 1-MHz 偏移时，测得的峰值 PN 为 -124.2 dBc/Hz，估计的 1/ ${f}^{3}$ PN 为 -124.2 dBc/Hz。^{3}$ PN 角在整个 17% 工作范围（4.14-4.97 GHz）内的变化范围为 63 至 89 kHz。

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A 63–89-kHz 1/f³ Phase Noise Corner QVCO Using Enhanced Wideband-Harmonic-Shaping Technique

A quadrature voltage-controlled oscillator (QVCO) utilizing the enhanced wideband-harmonic-shaping technique to improve phase noise (PN) and reduce the 1/

${f} ^{3}$

PN corner is presented. Specifically, our QVCO uses triple-coil magnetic coupling for quadrature phase generation, additionally boosts the common-mode (CM) impedance and harmonic voltage, and contributes to a well-defined CM current returning path for PN improvement and flicker noise upconversion reduction. Besides, the head resonator (HR) enables wideband-harmonic-shaping operation and facilitates without manual second harmonic alignment. The QVCO is implemented in 55-nm CMOS and occupies a core area of 0.362 mm2. The measured peak PN is −124.2 dBc/Hz at 1-MHz offset, and the estimated 1/

${f} ^{3}$

PN corner varies from 63 to 89 kHz across the entire operating range of 17% (4.14–4.97 GHz).

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