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Design of a 2.5-GHZ QVCO robust against high frequency substrate noise
Molina Garcia, Marc Manel; Gómez Salinas, Dídac; Aragonès Cervera, Xavier; Mateo Peña, Diego; González Jiménez, José Luis
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. HIPICS - Grup de Circuits i Sistemes Integrats d'Altes Prestacions
This work presents the design procedure followed to obtain a low-power voltage-controlled oscillator (VCO) robust against high-frequency substrate noise, using as a demonstrator a 2.5 GHz VCO with quadrature outputs (QVCO) based on a 5-GHz LC tank resonant VCO (LC-VCO) and frequency divider. A simple, intuitive, and easy to handle analytical model is proposed to identify the design parameters that contribute to the performance degradation of LC-VCOs due to the effect of high frequency substrate noise. The guidelines obtained have been applied in the design of the low-power QVCO. Finally, the work discusses several trade-offs that can be used to maximize the immunity of a LC-VCO against substrate noise.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Microelectrònica::Circuits integrats
Voltage-controlled oscillators
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