US 12,292,778 B2
Power management in audio systems
Chris Rattray, Newbury (GB); Zhengyi Xu, Fleet (GB); and Miles K. Roberto, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on May 19, 2023, as Appl. No. 18/320,415.
Prior Publication US 2024/0385675 A1, Nov. 21, 2024
Int. Cl. G06F 1/32 (2019.01); G06F 1/3206 (2019.01); G06F 1/3234 (2019.01); H04R 3/00 (2006.01)
CPC G06F 1/3243 (2013.01) [G06F 1/3206 (2013.01); H04R 3/007 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A power management system for managing power consumption of a digital signal processor (DSP) that implements a protection system, wherein the DSP comprises a plurality of distinct processing blocks, each configured to perform a particular function, the power management system comprising:
a power management block configured to:
detect a parameter indicative of a power of an input signal to the DSP and control a mode of operation of the plurality of distinct processing blocks based on the detected parameter;
wherein the power management block is configured to:
compare the detected parameter to a threshold; and
responsive to a determination that the detected parameter is less than the threshold, cause one or more of the plurality of distinct processing blocks of the DSP to enter a low power mode of operation.