采用 65 纳米 CMOS 的 11.3-16.6-GHz VCO,具有构造性开关磁耦合功能

IF 3.7 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal on Emerging and Selected Topics in Circuits and Systems Pub Date : 2023-12-18 DOI:10.1109/JETCAS.2023.3344510
Yuetong Lyu;Changwenquan Song;Pei Qin;Liang Wu
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引用次数: 0

摘要

传统的基于变压器的磁性调谐已经证明了压控振荡器(VCO)的双频甚至多频运行。然而,所采用的破坏性磁耦合会给变压器带来隐含损耗,从而降低其品质因数(Q),并且无法实现连续的频率覆盖,导致性能低下。为解决这一问题,本文提出了一种建设性开关磁耦合(CSMC)技术,通过同相耦合和显式开关实现双频操作,并将 Q 值提高到一个频段。为进行验证,设计了采用 CSMC 技术的变压器,并将其应用于双频 VCO 设计中。VCO 采用 65 纳米 CMOS 工艺制造,测量结果表明振荡频率范围为 37.8%,从 11.3 GHz 到 16.6 GHz,0.65 V 电压电源的功耗为 2.5 mW。在整个频率覆盖范围内,测量到的相位噪声范围为-129.6 至-123.7(偏移 10 MHz),FoM 为 186-192.1 dBc/Hz。芯片的核心面积为 0.43 美元乘以 0.25 美元 mm2(不包括焊盘)。
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A 11.3–16.6-GHz VCO With Constructive Switched Magnetic Coupling in 65-nm CMOS
Conventional transformer-based magnetic tuning has demonstrated dual-band or even multi-band operation for voltage-controlled oscillators (VCOs). However, the destructive magnetic coupling employed introduces implicit loss to the transformer thus degrading its quality factor (Q), and achieves a continuous frequency coverage resulting in inferior performance. To address this issue, this paper proposes a constructive switched magnetic coupling (CSMC) technique, realizing dual-band operation with the Q improvement into one band due to the in-phase coupling and the explicit switch. For validation, a transformer employing the CSMC technique is designed and deployed in a dual-band VCO design. Fabricated in a 65-nm CMOS process, the VCO is measured with an oscillation frequency range of 37.8%, from 11.3 to 16.6 GHz, while consuming 2.5-mW from a 0.65-V voltage supply. Within the entire frequency coverage, the measured phase noise ranges from −129.6 to −123.7 at 10-MHz offset, resulting in FoM of 186-192.1 dBc/Hz. The core area of the chip is $0.43\times 0.25$ mm2 excluding pads.
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来源期刊
CiteScore
8.50
自引率
2.20%
发文量
86
期刊介绍: The IEEE Journal on Emerging and Selected Topics in Circuits and Systems is published quarterly and solicits, with particular emphasis on emerging areas, special issues on topics that cover the entire scope of the IEEE Circuits and Systems (CAS) Society, namely the theory, analysis, design, tools, and implementation of circuits and systems, spanning their theoretical foundations, applications, and architectures for signal and information processing.
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