Pakasiri, Chatrpol

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Pakasiri, Chatrpol
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Pakasiri, Charpol
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chatrpol.pa@kmitl.ac.th

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    Item type:Publication,
    A Compact 0.73~3.1 GHz CMOS VCO Based on Active-Inductor and Active-Resistor Topology
    (2024-06-01)
    Pakasiri, Chatrpol
    ;
    Hsu, Ke Chung
    ;
    Wang, Sen
    In this paper, a wideband VCO that covers popular Long-Term Evolution (LTE) 0.7 GHz and LTE 2.6 GHz frequencies is designed and developed in a standard 0.18 μm CMOS process. The VCO utilizes active inductors to achieve coarse-tuning of the inductance and a compact chip area. Moreover, an active feedback resistor is introduced into the active inductor for fine-tuning of the inductance. The feedback resistor also affects the equivalent resistance of the active inductor; therefore, wide inductance tuning and low power consumption can be obtained by optimizing the resistor. The core area of the fabricated CMOS chip is merely 0.046 mm<sup>2</sup>, excluding all testing pads. With a 6.7~10.1 mW DC consumption, the measured oscillation frequencies range from 0.73 GHz to 3.1 GHz, which demonstrates a 123.8% tuning range. At the frequencies of interest, the measured phase noises are from −80.7 to −84.5 dBc/Hz at a 1 MHz offset frequency.