Digitally-assisted analog and analog-assisted digital design techniques for a 28 nm mobile System-on-Chip

Author

Xicheng Jiang ; Ramachandran, Narayan Prasad ; Dae Woon Kang ; Chee Kiong Chen ; Rutherford, Mark ; Yonghua Cong ; Chang, David

Author_Institution

Broadcom Corp., Irvine, CA, USA

fYear

2014

fDate

22-26 Sept. 2014

Firstpage

475

Lastpage

478

Abstract

A 28 nm 4G/LTE mobile System-on-Chip (SoC) with digitally-assisted analog and analog-assisted digital design techniques is presented. Multicore processors with integrated switching regulators achieve 1.8 GHz and 1.5 GHz speeds for A15 and A7 processors, respectively. The multiphase integrated switching regulator achieves 90% efficiency and up to 8A current capability. PVT monitors enable DVFS and AVS to further improve system efficiency. The all-digital CDR achieves state-of-the-art FOMs at 0.208 mW/Gb/s and 468.75 μm²/Gb/s. An intra-bit boosting technique helps the USB2.0 TX meet the eye mask with a 200 ps margin and reduced rise and fall times.

Keywords

4G mobile communication; Long Term Evolution; UHF integrated circuits; clock and data recovery circuits; integrated circuit design; system-on-chip; 4G-LTE mobile system-on-chip; A15 processors; A7 processors; AVS; DVFS; FOMs; PVT monitors; SoC; USB2.0 TX; all-digital CDR; analog-assisted digital design techniques; digitally-assisted analog design techniques; eye mask; frequency 1.5 GHz; frequency 1.8 GHz; integrated switching regulators; intra-bit boosting technique; multicore processors; multiphase integrated switching regulator; size 28 nm; system efficiency; time 200 ps; Clocks; Monitoring; Program processors; Resistors; System-on-chip; Temperature measurement; Temperature sensors; AVS; All-digital CDR; Analog-assisted digital technique; DVFS; Digitally-assisted analog technique; Intra-bit boosting; Multicore processor; PVT monitor; Switching regulator; System-on-chip;

fLanguage

English

Publisher

ieee

Conference_Titel

European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th

Conference_Location

Venice Lido

ISSN

1930-8833

Print_ISBN

978-1-4799-5694-4

Type

conf

DOI

10.1109/ESSCIRC.2014.6942125

Filename

6942125