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Prevention of signal clipping due to decrease in amplifier supply voltage

A technology of power supply voltage and amplifier, which is applied in the field of prevention of audio signal clipping, can solve problems such as easy imbalance of power supply voltage, and achieve the effect of eliminating shortcomings and problems

Active Publication Date: 2018-08-28
CIRRUS LOGIC INT SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The constraints on input power consumption described in the '616 application can create conditions where the boosted supply voltage output by the boost converter is prone to misregulation

Method used

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  • Prevention of signal clipping due to decrease in amplifier supply voltage
  • Prevention of signal clipping due to decrease in amplifier supply voltage
  • Prevention of signal clipping due to decrease in amplifier supply voltage

Examples

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Embodiment Construction

[0028] Figure 1A An exemplary personal audio device 1 is shown according to an embodiment of the present disclosure. Figure 1A A personal audio device 1 is shown coupled to headphones 3 in the form of a pair of earbud speakers 8A and 8B. Figure 1A The headphones 3 shown are examples only, and it should be understood that the personal audio device 1 may be used in conjunction with a variety of audio transducers, including but not limited to headphones, earbuds, earphones, and external speakers. The plug 4 may provide connection for the earphone 3 and the electrical terminals of the personal audio device 1 . The personal audio device 1 may provide a display to the user and use the touch screen 2 to receive user input, or alternatively, a standard liquid crystal display (LCD) may interface with various buttons, slides, blocks and / or dials for merging. same as Figure 1A As shown, the personal audio device 1 may include an audio integrated circuit (IC) 9 for generating an analo...

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PUM

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Abstract

A method may include receiving information indicative of an amplitude of an audio output signal, receiving information indicative of a predicted voltage of a power supply of a signal path having an audio input for receiving an audio input signal and an audio output for generating the audio output signal based on the audio input signal, predicting from the information indicative of the amplitude ofthe audio output signal and the information indicative of the predicted voltage of the power supply whether the audio output signal will exceed an available supply voltage generated by the power supply, and responsive to determining the audio output signal will exceed the available supply voltage generated by the power supply, attenuating the audio input signal or a derivative thereof to reduce the amplitude of the audio output signal such that the audio output signal does not exceed the available supply voltage of the power supply.

Description

[0001] Related Application Cross Reference [0002] This disclosure claims priority to U.S. Nonprovisional Patent Application Serial No. 15 / 342,846, filed November 3, 2016, which claims U.S. Provisional Patent Application Serial No. 15 / 342,846, filed November 17, 2015 Priority of Serial No. 62 / 256,498, each of which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates generally to audio device circuitry, including but not limited to personal audio devices such as wireless telephones and media players, and more particularly to the prevention of audio signal clipping due to amplifier supply voltage drops. Background technique [0004] 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 circ...

Claims

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Application Information

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IPC IPC(8): H03G3/00H03G3/30H03G7/00
CPCH03G3/007H03G7/002H03G7/007H03G3/005H04R3/04H04R29/001H03G3/3005
Inventor 杰弗瑞·艾伦·梅菲拉斯·阿兹莱依
Owner CIRRUS LOGIC INT SEMICON
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