Method for limiting amplifier input current to avoid low voltage conditions

A condition, audio input technology, applied in the direction of improving amplifiers to reduce temperature/supply voltage changes, amplifier types, low frequency amplifiers, etc.

Active Publication Date: 2020-10-30
CIRRUS LOGIC INT SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the user's perspective, this may produce a "pumping" effect of the audio content, where the audio volume repeatedly becomes louder and softer, as the reactive power-down reduction system may set the reactive power-down response to in a continuous cycle

Method used

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  • Method for limiting amplifier input current to avoid low voltage conditions
  • Method for limiting amplifier input current to avoid low voltage conditions
  • Method for limiting amplifier input current to avoid low voltage conditions

Examples

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Embodiment Construction

[0030] figure 1 is a diagram of an example personal audio device 1 according to an embodiment of the present disclosure. The personal audio device 1 is an example of a device in which techniques according to embodiments of the present disclosure may be employed, but it should be understood that the personal audio device 1 shown or in the following figures is not required in order to practice the subject matter recited in the claims. All elements or configurations embodied in the circuits depicted in the illustrations. The personal audio device 1 may include a transducer such as a speaker 5 that reproduces: long-distance speech received by the personal audio device 1 as well as other local audio events (such as ringtones, stored audio program material, etc.) for providing a balanced conversational awareness. , injection of near-end speech (i.e., the voice of the user of the personal audio device 1), and other audio that needs to be reproduced by the personal audio device 1, su...

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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 adaptive estimates of power supply conditions, wherein the information indicative of adaptive estimates of the power supply conditions comprises information regarding a voltage component and a resistive component received from an adaptive battery model of a battery for providing electrical energy to a power supply for generating the power supply voltage and adapt the adaptive battery model based on a monitored battery voltage output by the battery and loading events of the signal path and excluding loading events of components other than the signal path which are powered from the battery.

Description

technical field [0001] The present disclosure relates generally to circuits for audio devices, including but not limited to personal audio devices such as wireless telephones and media players, and more particularly to methods for predictively preventing power-down conditions in personal audio devices ( brownout condition) system and method. Background technique [0002] Personal audio devices including wireless phones (such as mobile / cellular phones, cordless phones, mp3 players) and other consumer audio devices are in widespread use. Such personal audio equipment may include circuitry for driving a pair of headphones or one or more speakers. Such circuits typically include power amplifiers to drive the audio output signal to headphones or speakers. [0003] In general, the size of personal audio devices continues to decrease, but many users expect louder sound from these personal audio devices. This imposes physical size constraints on the batteries used to power the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/30H03F3/183
CPCH03F1/30H03F3/183H03F2200/03
Inventor 罗杰·史威杰森·W·劳伦斯菲拉斯·阿兹拉伊杰弗里·艾伦·梅苏洁
Owner CIRRUS LOGIC INT SEMICON
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