论文信息 - A variable inductor using mutual-current control and application to a SiGe 4.5-GHz VCO for wide tuning range

A variable inductor using mutual-current control and application to a SiGe 4.5-GHz VCO for wide tuning range

A novel variable inductor using mutual current control was developed and applied to a 4.5-GHz SiGe voltage controlled oscillator (VCO). It consists of a primary inductor, a secondary inductor, and a variable capacitor, and its inductance can be tuned by adjusting the capacitance of the capacitor. It was designed for application to a proposed 4.5-GHz VCO in 0.25-/spl mu/m SiGe BiCMOS technology. It exhibited a large inductance variation of 22% and a high quality factor of 24 at 4.5 GHz in electro-magnetic simulation. The VCO has a 1.2-GHz tuning range, 32% wider than that of a conventional VCO, and a low phase noise of -121.8 dBc/Hz (at a 1-MHz offset frequency).

[1] Judith Maget,et al. Influence of novel MOS varactors on the performance of a fully integrated UMTS VCO in standard 0.25-/spl mu/m CMOS technology , 2002 .

[2] J. Plouchart,et al. A 1-V 3.8 - 5.7-GHz wide-band VCO with differentially tuned accumulation MOS varactors for common-mode noise rejection in CMOS SOI technology , 2003 .

[3] O. Kenneth,et al. Estimation methods for quality factors of inductors fabricated in silicon integrated circuit process technologies , 1998, IEEE J. Solid State Circuits.

[4] Nikolay Tchamov,et al. A 4.3-GHz VCO with 2-GHz tuning range and low phase noise , 2001 .

[5] G. Palmisano,et al. A 12-GHz silicon bipolar dual-conversion receiver for digital satellite applications , 2005, IEEE Journal of Solid-State Circuits.