Abstract
In this paper a seven-terminal transformer has been designed. We have suggested its equivalent-circuit model. This transformer has a primary coil with a center tap and two secondary coils. Based on this transformer, a low-cost transformer-based gate-coupled quadrature oscillator (LTGC-QO) using 0.18 µm CMOS technology has been developed. The LTGC-QO consumes 7 mW at 1 V power supply. The simulated phase noise at 1 MHz offset is–116.3 dBc/Hz. The chip area is 400×500 µm.
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References
A. Rofougaran, J. Rael, M. Rofougaran, A. Abidi, “A 900 MHz CMOS LC-oscillator with quadrature outputs,” Proc. of IEEE 42nd Int. Conf. on Solid-State Circuits, ISSCC, 10 Feb. 1996, San Francisco, CA, USA (IEEE, 1996), pp. 392–393, DOI: 10.1109/ISSCC.1996.488731.
Yi Shen, K. F. Tsang, Wah Ching Lee, Faan Hei Hung, I. F. Triantis, Kai Xuan, “Design of low-phase-noise CMOS transformer-based gate-coupled quadrature VCO,” Electron. Lett. 50, No. 6, 434 (Mar. 2014), DOI: 10.1049/el.2014.0093.
Zhenbiao Li, “A low-phase-noise and low-power multiband CMOS voltage-controlled oscillator,” IEEE J. Solid-State Circuits 40, No. 6, 1296 (Jun. 2005), DOI: 10.1109/JSSC.2005.848031.
Shen Wang, V. Chawla, Dong Sam Ha, Beomsup Kim, “Low-voltage low-power 1.6 GHz quadrature signal generation through stacking a transformer-based VCO and a divide-by-two,” IEEE Trans. Circuits Syst. I: Regular Papers 69, No. 12, 2901 (Dec. 2012), DOI: 10.1109/TCSI.2012.2206434.
N. Shiramizu, T. Masuda, T. Nakamura, K. Washio, “Scalable transformer model based on ladder topological equivalent circuit for Si RFICs,” Proc. of Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF, 11–13 Jan. 2010, New Orleans, LA (IEEE, 2010), pp. 12–15, DOI: 10.1109/SMIC.2010. 5422954.
Wei Gao, Chao Jiao, Tao Liu, Zhiping Yu, “Scalable compact circuit model for differential spiral transformers in CMOS RFICs,” IEEE Trans. Electron Devices 53, No. 9, 2187 (Sept. 2006), DOI: 10.1109/TED.2006.880230.
Y. Mayevskiy, A. Watson, P. Francis, Kyuwoon Hwang, A. Weisshaar, “A new compact model for monolithic transformers in silicon-based RFICs,” IEEE Microwave Wireless Compon. Lett. 15, No. 6, 419 (Jun. 2005), DOI: 10.1109/LMWC.2005.850558.
Ouail El-Gharniti, E. Kerherve, J.-B. Begueret, “El-Gharniti O. Modeling and characterization of on-chip transformers for silicon RFIC,” IEEE Trans. Microwave Theory Tech. 55, No. 4, 607 (Apr. 2007), DOI: 10.1109/TMTT.2007.893647.
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Original Russian Text © M. Ma, Y. Chen, X. Jin, Z. Li, C. Li, X. Zhang, 2016, published in Izv. Vyssh. Uchebn. Zaved., Radioelektron., 2016, Vol. 59, No. 5, pp. 20–26.
This work was financially supported by the State Key Program of National Natural Science of China (Grant No. 61233010), the Nature Science Foundation of China (No. 61176032), the program funded by Hunan province education administration (No. 14C1072) and the provincial natural science project of Hunan provincial (No. 2015JJ2140).
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Ma, M., Chen, Y., Jin, X. et al. Modeling of the seven-terminal transformer implemented in the LTGC-QO. Radioelectron.Commun.Syst. 59, 207–211 (2016). https://doi.org/10.3103/S0735272716050022
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DOI: https://doi.org/10.3103/S0735272716050022