A 10-mW mm-wave phase-locked loop with improved lock time in 28-nm FD-SOI CMOS
Artikel i vetenskaplig tidskrift, 2019

© 2019 IEEE. This paper presents a millimeter-wave (mm-wave) phase-locked loop (PLL), with an output frequency centered at 54.65 GHz. It demonstrates a mode-switching architecture that considerably improves the lock time, by seamlessly switching between a low-noise mode and a fast-locking mode that is only used during settling. The improvement is used to counteract the increased lock-time caused by cycle-slips that results from using a high reference frequency of 2280 MHz, which is several hundred times the loop bandwidth. Such a reference frequency alleviates the noise requirements on the PLL and is readily available in 5G systems, from the radio frequency PLL. The mm-wave PLL is implemented in a low-power 28-nm fully depleted silicon-on-insulator CMOS process, and its active area is just 0.19 mm 2 . The PLL also features a novel double injection-locked divide-by-3 circuit and a charge-pump mismatch compensation scheme, resulting in state-of-the-art power consumption, and jitter performance in the low-noise mode. In this mode, the in-band phase noise is between-93 and-96 dBc/Hz across the tuning range, and the integrated jitter is between 176 and 212 fs. The total power consumption of the mm-wave PLL is only 10.1 mW, resulting in a best-case PLL figure-of-merit (FOM) of-245 dB. The lock time in low-noise mode is up to 12μs, which is improved to 3μs by switching to the fast-locking mode, at the temporary expense of a power consumption increase to 15.1 mW, an integrated jitter increase to between 245 and 433 fs, and an FOM increase to between-235 and-240 dB.

millimeter-wave (mm-wave)

injection-locked divider

low phase noise

low power

fast lock time

phase-locked loop (PLL)

local oscillator (LO)



frequency synthesizer

60 GHz


Charge pump (CP)



Mohammed Abdulaziz

Lunds universitet

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik, Mikrovågselektronik

Ericsson AB

Therese Forsberg

Lunds universitet

Markus Tormanen

Lunds universitet

Henrik Sjoland

Lunds universitet

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 67 4 1588-1600 8645801


Annan fysik


Annan elektroteknik och elektronik



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