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Abstract: A 3.6-GHz digital fractional-N frequency synthesizer achieving low noise and 500-kHz bandwidth is presented. This architecture uses a gated-ring-oscillator time-to-digital converter (TDC) ...

2 Institute of Anaesthesiology and Critical Care, Catholic University of the Sacred Heart, Rome, Italy Non-invasive high-frequency oscillatory ventilation (NHFOV) consists of the application of a bias ...