DocumentCode
2016264
Title
Low power all digital acoustic noise suppression technique for switching voltage regulators
Author
Matthew, George E ; Krishnamurthy, Harish K ; Ravichandran, Krishnan ; Proefrock, Wayne ; Kumar, Pavan ; Weng, Sheldon ; Sankarnarayan, Karthik ; Gullbrand, Jessica ; Beltman, Willem Marco
Author_Institution
Intel Labs, Intel Corporation, Hillsboro, Oregon, USA
fYear
2015
fDate
12-15 July 2015
Firstpage
1
Lastpage
6
Abstract
An all-digital method of pseudo randomly varying switching frequency of a buck VR in non-linear low power modes (hysteretic and pulse frequency modulation) is proposed in order to reduce acoustic noise. The switching frequency is maintained within the audio range, instead of being increased, and hence switching losses do not increase. The random variation in switching frequency in this scheme converts tonal noise to white noise which has lower peak power and is less noticeable to humans.
Keywords
Acoustic noise; Capacitors; Inductors; Noise; Switching frequency; Threshold voltage; Voltage control; acoustic noise; buck voltage regulator; hysteretic control; low power; non-linear control; pulse frequency modulation; spread spectrum;
fLanguage
English
Publisher
ieee
Conference_Titel
Control and Modeling for Power Electronics (COMPEL), 2015 IEEE 16th Workshop on
Conference_Location
Vancouver, BC, Canada
Type
conf
DOI
10.1109/COMPEL.2015.7236520
Filename
7236520
Link To Document