Transistor-only low-voltage RF quadrature oscillator and frequency divider

Abstract

An inductorless oscillator operating in the current domain for generating radio-frequency quadrature signals is presented. The quadrature phase and gain requirements can be achieved by cascading four low-voltage regulated cascode cells in a ring fashion. To demonstrate the proposed topology, a 0.9-V oscillator working from 0.44 GHz to 3.4 GHz and having a phase noise variation ranging between -92 dBc/Hz to -84.6 dBc/Hz at 3-MHz offset was simulated for a 0.18-/spl mu/m standard digital CMOS technology. In addition to working as a quadrature oscillator, the proposed circuit can be utilized as a frequency divider without modifying the topology.

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Cite this paper

@article{Yodprasit2005TransistoronlyLR, title={Transistor-only low-voltage RF quadrature oscillator and frequency divider}, author={U. Yodprasit and C. Enz}, journal={2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks}, year={2005}, pages={70-73} }