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A Low-Complexity, Low-Phase-Noise, Low-Voltage Phase-Aligned Ring Oscillator in 90 nm Digital CMOS

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6 Author(s)

An 8-phase phase-aligned ring oscillator in 90 nm digital CMOS is presented that operates up to 2 GHz. The low-complexity circuit consumes 13 mW at 2 GHz and 1.2 mW at 400 MHz, while a flat in-band phase noise below -120 dBc/Hz is achieved, in close agreement with the presented theory. The circuit occupies an area of 0.008 mm2 .

Published in:

IEEE Journal of Solid-State Circuits  (Volume:44 ,  Issue: 7 )