Three-Winding Transformer-Based 60-GHz DCO with -185.1 dB FoM in 40-nm CMOS
| Autor: | Yun Fang, Robert Bogdan Staszewski, Hao Gao |
|---|---|
| Přispěvatelé: | Integrated Circuits |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Millimeter-wave (mm-wave)
DCO Q-factor fundamental-and-harmonic dual-frequency Doppler radar Capacitors Tuning Windings three-winding transformer Fundamental-and-harmonic dual-frequency (FHDF) Doppler radar Three-winding transformer Transformers mm-wave Couplings Oscillators Electrical and Electronic Engineering |
| Zdroj: | IEEE Solid-State Circuits Letters, 5:9657075. Institute of Electrical and Electronics Engineers |
| ISSN: | 2573-9603 |
| DOI: | 10.1109/lssc.2021.3137131 |
| Popis: | This letter presents a 60 GHz fundamental DCO featuring an FoM of –185.1 dB at a 10 MHz offset. The DCO is intended for a 60/120 GHz fundamental-and-harmonic dual-frequency Doppler radar thanks to its cost-efficiency advantages. Based on a three-winding transformer, the proposed class-F DCO achieves good phase noise, which is essential for narrowing the detected range uncertainty. In this work, a π-model of the three-winding transformer is adopted and analyzed. A methodology of optimizing the resonator’s quality factor and the zero-crossing slope is proposed. The DCO is fabricated in 40-nm CMOS and achieves a 14% tuning range with a minimum frequency step of 2.3 MHz. At 66.4 GHz, the measured phase noise is –98.2 dBc/Hz at 1 MHz offset, and –120.1 dBc/Hz at 10 MHz offset. |
| Databáze: | OpenAIRE |
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