Transformer-Based Dual-Mode VCO for Multi-Mode Multi-Standard Receiver
关键词:
Dual-mode VCO, transformer, wideband摘要
The proposed VCO in this paper is used for multi-mode multi-standard wireless transceiver. The overall scheme includes two VCOs, each VCO adopts transformer-based structure. On-chip transformer which uses coplanar central tap structure and adopts the top metal winding is present. The primary and secondary inductances adopt octagon differential structure. Electromagnetic field (EM) simulation is carried out by using ADS Momentum. Negative conductance unit adopts the current reuse of cross coupled MOSFET. Oscillation mode can be chosen by switch. The primary and secondary inductances of the transformer are connected with 4 bit binary switches capacitor arrays and varactors under different oscillation modes to extend the range of frequency adjustment. Measurement results show that the frequency range is from 1.2 to 7.3 GHz and the phase noise at 1 MHz offset is less than -80 dBc/Hz in the whole frequency range.
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参考
S. A. Osmany, F. Herzel, and J. C. Scheytt, “An integrated 0.6–4.6 GHz, 5–7 GHz, 10–14 GHz, and 20–28 GHz frequency synthesizer for softwaredefined radio applications,” IEEE Journal of SolidState Circuits, vol. 45, no. 9, pp. 1657-1668, 2010.
J. Kim, J. Shin, S. Kim, and H. Shin, “A wide-band CMOS LC VCO with linearized coarse tuning characteristics,” IEEE Trans. Circuits Syst. II, vol. 55, no. 5, pp. 399-403, 2008.
W. Zou, X. Chen, K. Dai, and X. Zou, “Switchedinductor VCO based on tapped vertical solenoid inductors,” Electron. Lett., vol. 48, no. 9, pp. 509- 511, 2008.
Y. Takigawa, H. Ohta, Q. Liu, S. Kurachi, N. Itoh, and T. Yoshimasu, “A 92.6% tuning range VCO utilizing simultaneously controlling of transformers and MOS varactors in 0.13 μm CMOS technology,” IEEE Radio Frequency Integrated Circuits Symp., (RFIC), Boston, MA, USA, pp. 83-86, 2009.
J. T. Xu, C. E. Saavedra, and G. Chen, “An active inductor-based VCO with wide tuning range and high DC-to-RF power efficiency,” IEEE Trans. Circuits Syst. II, vol. 58, no. 8, pp. 462-466, 2011.
M. Demirkan, S. P. Bruss, and R. R. Spencer, “Design of wide tuning-range CMOS VCOs using switched coupled-inductors,” IEEE Journal of Solid-State Circuits, vol. 43, no. 5, pp. 1156-1163, 2008.
A. Bevilacqua, F. P. Pavan, C. Sandner, A. Gerosa, and A. Neviani, “A 3.4-7 GHz transformer-based dual-mode wideband VCO,” IEEE Eur. Solid-State Circuit Conference.(ESSCRIC), pp. 440-443, 2006.
A. Bevilacqua, F. P. Pavan, C. Sandner, A. Gerosa, and A. Neviani, “Transformered-based dual-mode voltage-controlled oscillators,” IEEE Trans. Circuit Syst. II: Express Briefs, vol. 54, no. 4, pp. 293-297, 2007.
N. Tchamov, S. Broussev, I. Uzunov, and K. K. Rantala, “Dual-band LC VCO architecture with a fourth-order resonator,” IEEE Trans. Circuit Syst. II: Exp. Briefs, vol. 54, no. 3, pp. 277-281, 2007.
S. Rong and H. C. Luong, “A 1V 4 GHz-and-10 GHz transformer-based dual-band quadrature VCO in 0.18μm CMOS,” Proc. IEEE Custom Integr. Circuit Conference. (CICC), vol. 38, no. 8, pp. 1325-1332, 2003.
