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- W4312448580 abstract "This work presents a low-jitter and low out-of-band noise two-core fractional- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$N$ </tex-math></inline-formula> digital bang-bang phase-locked loop (PLL). Two novel techniques are introduced to efficiently suppress the quantization noise (QN) of the digitally controlled oscillator (DCO) and to achieve an optimal trade between power consumption and PLL noise. The digital period averaging technique, working in background of the main system, enables the use of a low-power XOR-based quadrupler for clocking <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$Delta Sigma $ </tex-math></inline-formula> modulator dithering the DCO tuning word. The true-in-phase combiner circuit implements a digitally assisted power combination of two PLL outputs, to optimally reduce the impact of the PLL noise sources. The prototype, implemented in a standard 28-nm CMOS process, has a core area of 0.47 mm2 and synthesizes frequencies from 8.5 to 10.5 GHz while dissipating 36 mW. The measured rms jitter (integrated from 1 kHz to 100 MHz and including spurs) is 72 fs for near-integer channels, with a worst case fractional spur of −59.7 dBc, while the measured out-of-band noise is −140.7 dBc/Hz at a 10-MHz offset." @default.
- W4312448580 created "2023-01-04" @default.
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- W4312448580 date "2023-03-01" @default.
- W4312448580 modified "2023-09-26" @default.
- W4312448580 title "A 72-fs-Total-Integrated-Jitter Two-Core Fractional-<i>N</i> Digital PLL With Digital Period Averaging Calibration on Frequency Quadrupler and True-in-Phase Combiner" @default.
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- W4312448580 doi "https://doi.org/10.1109/jssc.2022.3228899" @default.
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