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Title A 39.8% Locking Range Injection-locked Quadrature Voltage-controlled Oscillator using Fourth-order Resonator
Authors (Kwang-Il Oh) ; (Donghyun Baek)
DOI https://doi.org/10.5573/JSTS.2022.22.1.10
Page pp.10-16
ISSN 1598-1657
Keywords Injection-locked quadrature voltage-controlled oscillator (IL-QVCO); fourth-order resonator; in-phase and quadrature (I/Q); phase difference; CMOS
Abstract A 39.8% locking range injection-locked quadrature voltage-controlled oscillator (IL-QVCO) using fourth-order resonator is proposed. The fourth-order resonator is applied to widen the locking range compared with the conventional IL-QVCO using a second-order resonator. The self-oscillation frequency of the proposed IL-QVCO is 7.89 GHz, and the input frequency locking range is 7.08?10.56 GHz (39.8%) at an input power of 0 dBm. The in-phase and quadrature (I/Q) phase difference is 0.6° in their mean value while the standard deviation reaches 4.87°. The power consumption of the core is 42 mW from a 1-V supply voltage. The size of the IL-QVCO chip fabricated in a 65-nm complementary metal?oxide?semiconductor (CMOS) technology is 0.86 mm × 0.77 mm.