公开(公告)号：US10187025B1

公开(公告)日：2019-01-22

申请号：US14169349

申请日：2014-01-31

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey Allen May ,  Anu Chakravarty ,  John C. Tucker

IPC: G06F1/32 ,  H03G3/20

Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of an amplitude of the audio input signal, receive information indicative of a condition of the power supply, determine from the information indicative of an amplitude of the audio input signal and the information indicative of the condition of the power supply whether a brownout condition exists, and responsive to determining the brownout condition exists, generate the selectable attenuation signal to reduce an amplitude of the audio output signal such that the signal path attenuates the audio input signal or a derivative thereof in order to prevent brownout prior to propagation to the audio output of a portion of the audio input signal having the brownout condition.