Cirrus Logic Inc.

Cirrus Logic International Semiconductor Limited

Anu Chakravarty

Jeffrey Allen May

Christian Larsen

John Christopher Tucker

Gautham Devendra Kamath

Ullas Pazhayaveetil

Vivek Jindal

Terence C Bowness

A distributed network system may include a shared communication bus that operates in accordance with a communication protocol and a plurality of devices coupled to the shared communication bus. The communication protocol may define periods of time and an order by which each of the plurality of devices actively transmit data on the shared communication bus such that only one of the plurality of devices actively transmits data on the shared communication bus at a time to a remaining number of the plurality of devices through the shared communication bus. When the remaining number of the plurality of devices are not actively transmitting data, the remaining number of the plurality of devices may receive data via the shared communication bus so that bi-directional communication is established among the plurality of devices on the shared communication bus.

Multi-device synchronization of devices

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.

Systems and methods for predictively preventing a brownout condition in a personal audio device

Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.

Boost converter voltage controlled based on audio signal

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Austin, TX, United States of America

Anu Chakravarty