Audio driver circuit
AssigneeHon Hai Precision Industry Co., Ltd.
InventorSEN-LUNG HUANG
Life of this patent
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Abstract
An audio driver circuit includes a comparison circuit, a power distributing circuit, and an audio output circuit. The comparison circuit at least includes a comparator included a non-inverting input, an inverting input, and an output. The non-inverting input is electrically connected to a drive power supply. The inverting input is electrically connected to a reference power supply. The output of the comparator is electrically connected to an input of the power distributing circuit. The audio driver circuit further includes a mute control circuit. An output of the power distributing circuit is electrically connected to the mute control circuit. An input of the audio output unit is also electrically connected to the mute control circuit.
Claims9
An audio driver circuit, comprising:
- a comparison circuit comprising a comparator, the comparator comprising a non-inverting input, an inverting input, and an output, the non-inverting input electrically connected to a drive power, the inverting input electrically connected to a reference power supply;
- a mute control circuit;
- a power distributing circuit comprising an input electrically connected to the output of the comparator, and an output electrically connected to the mute control circuit;
- and
- an audio output circuit comprising at least two sound output units configured for emitting sound, each input of the at least two sound output units electrically connected to the mute control unit;
- when the voltage of the drive power is less than that of the reference power supply, the output of the comparator outputs a lower level voltage to the power distributing circuit, then the power distributer outputs a high level voltage to the mute controller to control the at least two sound output units working in a mute state.
Dependencies are inferred from the claim text.