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.
A 2 GHz Wide Tuning Range LC-Tank Digitally Controlled Oscillator in 28 nm CMOS Technology
G. Ciarpi
Primo
;G. Puccioni;M. Mestice;D. Monda;D. Rossi;S. Saponara
2023-01-01
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.File in questo prodotto:
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