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A 20–25.5 GHz VCO using a new variable inductor for K band application

Journal of Semiconductors 2013年第12期34卷 82-90页

作者：朱宁李巍李宁任俊彦 State Key Laboratory of ASIC & System Fudan University

A novel transformer-type variable inductor is proposed to achieve a wide tuning range at frequencies as high as K band. The variable inductor is designed, and an intuitive model is built to analyze its performance by HFSS. A lot of mathematical analysis is done in detail. A VCO using the proposed variable inductor is designed with TSMC 0.13 μm CMOS technology for verification. The frequency tuning range of the VCO depends on the proposed variable inductor. The phase noise of the VCO depends on the quality of the LC tank （including the proposed variable inductor and varactors）. So a specific AMOS varactor is implemented to improve its quality factor. The VCO is simulated at three typical TSMC fabrication comers （TT, FF, SS） to predict its measure results. The post simulation results shows that the VCO achieves a 20-25.5 GHz continuous tuning range. Its phase noise results at 1 MHz offset are -108.4 dBc/Hz and -100.5 dBc/Hz respectively at the tuning frequencies of 19.6 GHz and 25.5 GHz. The VCO draws only 3 to 6 mA from a 1.2 V power supply.

关键词： variable inductor modeling AMOS varactor wideband

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Novel Harmonic Free Single Phase variable inductor Based on Active Power Filter Strategy

Novel Harmonic Free Single Phase Variable Inductor Based on ...

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CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： Mu Xianmin Wang Jianze Ji Yanchao Wei Xiaoxia and Fu Xiangyun Electrical Engineering Department of Harbin Institute of Technology Harbin 150001 Heilongjiang P.R.China Electrical Engineering Department Harbin Institute of Technology Harbin Heilongjiang China

ISBN: (纸本)1424404487;9781424404483

＜正＞This paper presents a variable inductor for single phase system which employs a new control method based on active power filter schemes. The novel variable inductor combines an active power filter circuit and a control circuit. The active power filter circuit is based on a single phase inverter with four controllable switches, a standard H-bridge inverter. The AC side of the inverter is connected to an aid harmonic elimination winding of the variable inductor. Its DC side is connected to a filter capacitor and the secondary winding of variable inductor through the control circuit based on BUCK circuit. The inverter switches are controlled to shape the current through the filter inductor such that the primary current is in the same shape as the input voltage, and in the same time supply the active power consumer of control circuit. The controller is based on a conceptually simple control scheme, the energy balance concept. The advantages of new variable inductor are simplicity of control circuits, low cost and good response. In theory, the harmonic current component of the variable inductor is zero. The feasibility of this theory is verified by using Matlab/Simulink simulation results.

关键词： variable inductor harmonic elimination PWM converter energy balance

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