A Wide-Tuning Range 1.8 GHz Quadrature VCO Utilizing Coupled Ring Oscillators
2006 (English)In: Proc. IEEE International Symposium on Circuits and Systems (ISCAS), 2006, 5143-5146 p.Conference paper (Refereed)
This paper presents a fully integrated 1.8 GHz, 0.35-/spl mu/m CMOS quadrature voltage-controlled oscillator (QVCO) design. The topology uses coupled ring oscillators to produce quadrature outputs. In order to gain better phase noise performance LC-based filtering is introduced to QVCO. Also using variable inductance concept, a 1.2 GHz tuning range is achieved. According to simulation results, proposed QVCO draws 26.1 mA from 3.3V supply and exhibits a worst-case phase noise of -117.3 dBc/Hz at 1-MHz offset over the tuning range.
Place, publisher, year, edition, pages
2006. 5143-5146 p.
quadrature VCO, tuning range, coupled ring oscillators, CMOS
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-14046DOI: 10.1109/ISCAS.2006.1693790OAI: oai:DiVA.org:liu-14046DiVA: diva2:22521