A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications
By combining the transformer feedback and VCO multi-core techniques, this paper presents a 0.5 V low voltage 28.6-to-36.2 GHz dual-core VCO for 5G applications. Based on the transformer feedback topology, with the power-ground interconnect inductor and embedded decouple capacitor, the second harmoni...
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| Online Access: | https://ieeexplore.ieee.org/document/9049143/ |
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doaj-4c1f6451bcfb49b2887d3d2cf02025532021-03-30T03:04:31ZengIEEEIEEE Access2169-35362020-01-018621916219610.1109/ACCESS.2020.29837969049143A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G ApplicationsYupeng Fu0https://orcid.org/0000-0002-6237-0504Lianming Li1https://orcid.org/0000-0003-1873-4806Dongming Wang2Xuan Wang3School of Information Science and Engineering, Southeast University, Nanjing, ChinaSchool of Information Science and Engineering, Southeast University, Nanjing, ChinaSchool of Information Science and Engineering, Southeast University, Nanjing, ChinaSchool of Information Science and Engineering, Southeast University, Nanjing, ChinaBy combining the transformer feedback and VCO multi-core techniques, this paper presents a 0.5 V low voltage 28.6-to-36.2 GHz dual-core VCO for 5G applications. Based on the transformer feedback topology, with the power-ground interconnect inductor and embedded decouple capacitor, the second harmonic real impedance is achieved at the VCO cross-couple pair source terminal. Accordingly, the common-mode current path is reduced and the signal symmetry improved, suppressing the flicker noise up conversion. With a 4 bit switch capacitors and varactors, the proposed VCO achieves a 28.6-to-36.2 GHz (23.5 %) tuning range, and its flicker noise corner is from 250 to 980 kHz. Fabricated in a 65nm CMOS process, the VCO consumes 4.6mW from a 0.5 V supply voltage with a core area of about $0.24\times 0.5$ mm<sup>2</sup>. At 31 GHz, the proposed VCO achieves a phase noise of -103 dBc/Hz@1MHz offset, resulting in a figure-of-merit (FoM) of -186.2 dBc/Hz and tuning range figure-of-merit (FoMT) of -193.6 dBc/Hz, respectively.https://ieeexplore.ieee.org/document/9049143/Dual corelow supplytransformer feedbackVCO |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Yupeng Fu Lianming Li Dongming Wang Xuan Wang |
| spellingShingle |
Yupeng Fu Lianming Li Dongming Wang Xuan Wang A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications IEEE Access Dual core low supply transformer feedback VCO |
| author_facet |
Yupeng Fu Lianming Li Dongming Wang Xuan Wang |
| author_sort |
Yupeng Fu |
| title |
A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications |
| title_short |
A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications |
| title_full |
A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications |
| title_fullStr |
A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications |
| title_full_unstemmed |
A −193.6 dBc/Hz FoM<sub>T</sub> 28.6-to-36.2 GHz Dual-Core CMOS VCO for 5G Applications |
| title_sort |
−193.6 dbc/hz fom<sub>t</sub> 28.6-to-36.2 ghz dual-core cmos vco for 5g applications |
| publisher |
IEEE |
| series |
IEEE Access |
| issn |
2169-3536 |
| publishDate |
2020-01-01 |
| description |
By combining the transformer feedback and VCO multi-core techniques, this paper presents a 0.5 V low voltage 28.6-to-36.2 GHz dual-core VCO for 5G applications. Based on the transformer feedback topology, with the power-ground interconnect inductor and embedded decouple capacitor, the second harmonic real impedance is achieved at the VCO cross-couple pair source terminal. Accordingly, the common-mode current path is reduced and the signal symmetry improved, suppressing the flicker noise up conversion. With a 4 bit switch capacitors and varactors, the proposed VCO achieves a 28.6-to-36.2 GHz (23.5 %) tuning range, and its flicker noise corner is from 250 to 980 kHz. Fabricated in a 65nm CMOS process, the VCO consumes 4.6mW from a 0.5 V supply voltage with a core area of about $0.24\times 0.5$ mm<sup>2</sup>. At 31 GHz, the proposed VCO achieves a phase noise of -103 dBc/Hz@1MHz offset, resulting in a figure-of-merit (FoM) of -186.2 dBc/Hz and tuning range figure-of-merit (FoMT) of -193.6 dBc/Hz, respectively. |
| topic |
Dual core low supply transformer feedback VCO |
| url |
https://ieeexplore.ieee.org/document/9049143/ |
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