Abstract
This work presents the design, in 28 nm CMOS technology, of an integrated LC-tank Digitally Controlled Oscillator (DCO) operating around 2 GHz with a wide tuning range between 1.24 GHz and 2.51 GHz. The DCO, implemented with N- and P-cross-coupled MOSFETs, uses two capacitor banks, one fine and the other coarse, to cover all the frequency range with a minimum resolution of about 10 MHz. A digital gain control solution was also implemented to guarantee the startup and sustainment of the oscillation even in the worst conditions. The reported post-layout simulation results confirm compliance with the DCO constraints.
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Acknowledgments
Work partially supported by MIUR with the Dipartimenti di Eccellenza CrossLab-ForeLab projects and by European Union’s Horizon 2020 research and innovation program under grant agreement No 101036168 (European Process Initiative SGA2).
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Ciarpi, G., Puccioni, G., Mestice, M., Monda, D., Rossi, D., Saponara, S. (2023). A 2 GHz Wide Tuning Range LC-Tank Digitally Controlled Oscillator in 28 nm CMOS Technology. In: Berta, R., De Gloria, A. (eds) Applications in Electronics Pervading Industry, Environment and Society. ApplePies 2022. Lecture Notes in Electrical Engineering, vol 1036. Springer, Cham. https://doi.org/10.1007/978-3-031-30333-3_13
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DOI: https://doi.org/10.1007/978-3-031-30333-3_13
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