Design of 33-40GHz Low Power VCO in 90-nm CMOS Technology

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Abstract: This paper presents the IC design of a low power, wide tuning range and low phase noise voltage-controlled oscillator (VCO) in a standard 90-nm CMOS technology. The newly proposed current-reuse cross-connected pair is utilized as a negative conductance generator to compensate the energy loss of the resonator. The supply current is reduced by half compared to that of the conventional LC-VCO. An LC tank with switched capacitor is used to extend the overall VCO tuning range. The VCO achieves a tuning range of 33~40.4 GHz exhibiting a frequency tuning range (FTR) of 20.2%, a phase noise of -103.4 dBc/Hz at 1-MHz offset from 36-GHz carrier and showed an excellent FOM of –189dB. With the voltage supply of 1.5 V, the core circuit of VCO draws only 1.9mA DC current. The VCO is fully differential and integrated in a PLL circuit in the 90-nm CMOS technology.

WSEAS Transactions on Circuits and Systems, ISSN / E-ISSN: 1109-2734 / 2224-266X, Volume 14, 2015, Art. #13

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Zhu Li, Zhigong Wang, Zhiqun Li, Qin Li, "Design of 33-40GHz Low Power VCO in 90-nm CMOS Technology," WSEAS Transactions on Circuits and Systems, vol. 14, pp. 117-126, 2015, DOI:
Zhu Li, Zhigong Wang, Zhiqun Li, Qin Li. Design of 33-40GHz Low Power VCO in 90-nm CMOS Technology. WSEAS Transactions on Circuits and Systems. 2015;14:117-126.
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