Power save mode for audio interface drive amplifier
First Claim
1. A method comprising:
- sensing at least one electrical characteristic of an accessory that is connected to a device; and
setting a current consumption of an amplifier stage that is used to drive the accessory in accordance with the sensed at least one electrical characteristic so as to operate the amplifier stage in a stable mode of operation while consuming as little current as needed to operate the amplifier stage in the stable mode of operation.
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Accused Products
Abstract
An apparatus includes a data processor coupled with a memory that stores a program executable by the data processor; an accessory interface readably coupled with the data processor and an amplifier having an output coupled to the accessory interface and a program input coupled to the data processor. The amplifier is responsive to the program input to change a current consumption of the amplifier in accordance with at least one electrical characteristic associated with an accessory that is connected to the accessory interface. The data processor programs the amplifier to operate in a stable mode of operation while consuming as little current as needed to operate the amplifier in the stable mode of operation. The data processor directly or indirectly determines an amount of capacitance and/or impedance associated with an interface to the accessory, and programs the amplifier accordingly.
11 Citations
25 Claims
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1. A method comprising:
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sensing at least one electrical characteristic of an accessory that is connected to a device; and setting a current consumption of an amplifier stage that is used to drive the accessory in accordance with the sensed at least one electrical characteristic so as to operate the amplifier stage in a stable mode of operation while consuming as little current as needed to operate the amplifier stage in the stable mode of operation. - View Dependent Claims (2, 3, 4)
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5. A computer readable memory medium that stores a program of computer readable instructions, execution of the instructions resulting in operations that comprise:
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sensing at least one electrical characteristic of an accessory that is connected to a device; and setting a current consumption of an amplifier stage that is used to drive the accessory in accordance with the sensed at least one electrical characteristic so as to operate the amplifier stage in a stable mode of operation while consuming as little current as needed to operate the amplifier stage in the stable mode of operation. - View Dependent Claims (6, 7, 8)
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9. An apparatus, comprising:
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means for sensing at least one electrical characteristic of an accessory that is connected to an apparatus; and means for setting a current consumption of an amplifier stage that is used to drive the accessory in accordance with the sensed at least one electrical characteristic so as to operate the amplifier stage in a stable mode of operation while consuming as little current as needed to operate the amplifier stage in the stable mode of operation. - View Dependent Claims (10, 11, 12)
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13. An apparatus, comprising:
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a data processor coupled with a memory that stores a program executable by the data processor; an accessory interface readably coupled with the data processor; and an amplifier having an output coupled to the accessory interface and a program input coupled to the data processor, said amplifier responsive to the program input to change a current consumption of said amplifier in accordance with at least one determined electrical characteristic of an accessory connected to the accessory interface. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification