LIAO Xingyue,GUO Benqing.A Dual-Core CMOS VCO based on Three-Coil Transformer Coupling[J].Journal of Chengdu University of Information Technology,2025,40(03):273-277.[doi:10.16836/j.cnki.jcuit.2025.03.003]
一种基于三线圈变压器耦合的双核CMOS压控振荡器
- Title:
- A Dual-Core CMOS VCO based on Three-Coil Transformer Coupling
- 文章编号:
- 2096-1618(2025)03-0273-05
- Keywords:
- three-coil transformer; dual-core; phase noise; noise cycle; VCO
- 分类号:
- TP301.6
- 文献标志码:
- A
- 摘要:
- 提出一种低相位噪声压控振荡器(VCO)拓扑结构。基于三线圈变压器耦合,保持振荡器工作在F类的低噪声模式; 三线圈变压器的耦合,又在尾电流晶体管源极处形成噪声循环结构以实现晶体管噪声的降低; VCO又由单核扩展到双核,实现相位噪声的进一步降低。此外,变压器三线圈耦合结构不仅用于pMOS尾电流晶体管电流控制,还可消除传统共源结构的共模寄生电容,避免共模振荡。基于标准TSMC 65 nm CMOS工艺,使用ADS和Cadence Spectre-RF联合协同仿真,设计实现了14.5 GHz的双核VCO电路。模拟结果表明,在1 MHz偏移下得到的相位噪声为-123.6 dBc/Hz,FoM为191 dBc/Hz。电路核心面积为0.06 mm2,在1.2 V电源电压供给下,电流消耗为30.75 mA。
- Abstract:
- A low-phase noise voltage-controlled oscillator(VCO)topology is proposed.Based onthree-coil transformer coupling,the oscillator is kept in(class F)low noise mode; A noise cycle structure is formed at the source of the tail current transistor to reduce the noise of the transistor.The VCO is then extended from single-core to dual-core to achieve further reduction of phase noise. In addition,transformer three-coil coupling structure is not only used for pMOS tail current transistor current control,but also can eliminate the common mode parasitic capacitance of traditional common source structure.Based on the TSMC 65 nm CMOS process,a 14.5 GHz dual-core VCO circuit is designed by ADS and Cadence co-simulation.The simulation results show that the phase noise at 1MHz offset is-123.6 dBc/Hz and the FoM is 191 dBc/Hz.The core circuit area is 0.06 mm2,and the current consumption is 30.75 mA under the supply voltage of 1.2 V.
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备注/Memo
收稿日期:2024-03-31
项目基金:国家自然科学基金资助项目(61871073); 四川省自然科学基金资助项目(2022NSFSC0522)
通信作者:郭本青.E-mail:rficgbq@gmail.com