Archivio Istituzionale della RicercaThis Brief presents a process-scaling-friendly frequency-locked-loop (FLL)-based RC oscillator. It features an R-R-C frequency-to-voltage converter that entails resistors with only the same-sign temperature coefficients. Together with a low-leakage switched-capacitor resistor and a delta-sigma-modulator-based trimming, our 71.8-MHz RC oscillator in 28-nm CMOS achieves a frequency inaccuracy of 77.6 ppm/0C, a 0.43%/V supply sensitivity, and an 11-psrms period jitter. The energy efficiency is 368 fJ/cycle.
A 28 nm 368 fJ/cycle, 0.43%/V Supply Sensitivity, FLL based RC Oscillator Featuring Positive TC Only Resistors and ΣM Based Trimming / Huang, Yunbo; Chen, Yong; Yang, Kaiyuan; Crovetti, Paolo; Mak, Pui-In; Martins, Rui P.. - In: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. II, EXPRESS BRIEFS. - ISSN 1549-7747. - STAMPA. - 70:11(2023), pp. 3950-3954. [10.1109/TCSII.2023.3277617]
A 28 nm 368 fJ/cycle, 0.43%/V Supply Sensitivity, FLL based RC Oscillator Featuring Positive TC Only Resistors and ΣM Based Trimming
Paolo Crovetti;
2023
Abstract
This Brief presents a process-scaling-friendly frequency-locked-loop (FLL)-based RC oscillator. It features an R-R-C frequency-to-voltage converter that entails resistors with only the same-sign temperature coefficients. Together with a low-leakage switched-capacitor resistor and a delta-sigma-modulator-based trimming, our 71.8-MHz RC oscillator in 28-nm CMOS achieves a frequency inaccuracy of 77.6 ppm/0C, a 0.43%/V supply sensitivity, and an 11-psrms period jitter. The energy efficiency is 368 fJ/cycle.
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A_28_nm_368_fJ_cycle_0.43_V_Supply_Sensitivity_FLL_based_RC_Oscillator_Featuring_Positive_TC_Only_Resistors_and_M_Based_Trimming.pdf
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Crovetti-A28-nm.pdf
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https://hdl.handle.net/11583/2979477