论文信息 - Design of bipolar RF ring oscillators

Design of bipolar RF ring oscillators

This paper deals with RF ring oscillators in bipolar technology. Using a simplified approach based on a linear model, accurate design equations are provided for the main performance parameters such as the oscillation frequency, the oscillation amplitude, the quality factor, and the phase noise. Design considerations are also given which focus well tuning range and its relation with gain and oscillation amplitude, taking as a design example the most widely used gain stage. The proposed analysis is validated by the design of two and four-stage ring oscillators at 1.8 GHz using a high performance 18-GHz bipolar process. Simulations with the software CAD SpectreRF show an excellent agreement with the expected results.

Giuseppe Palmisano | Raffaele Salerno | C. Sclafani | S. Finocchiaro

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