Method and apparatus for conserving battery power
First Claim
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1. A method of conserving battery power, comprising the steps of:
- providing an electrical conductor that is connectable between an audio source and an accessory of the audio source, the conductor capable of conducting a first electrical signal, containing audio information from the audio source, to the accessory;
applying a second electrical signal to the conductor when the first electrical signal is not present on the conductor;
measuring an aspect of the second electrical signal which it is being applied to the conductor; and
reducing an amount of battery power supplied to the accessory when the measured aspect meets a predetermined condition.
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Abstract
A method of conserving battery power includes providing an electrical conductor that is connectable between an audio source and an accessory of the audio source. The conductor is capable of conducting a first electrical signal, containing audio information from the audio source, to the accessory. A second electrical signal is applied to the conductor when the first electrical signal is not present on the conductor. An aspect of the second electrical signal is measured while it is being applied to the conductor. An amount of battery power supplied to the accessory is reduced when the measured aspect meets a predetermined condition.
34 Citations
51 Claims
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1. A method of conserving battery power, comprising the steps of:
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providing an electrical conductor that is connectable between an audio source and an accessory of the audio source, the conductor capable of conducting a first electrical signal, containing audio information from the audio source, to the accessory; applying a second electrical signal to the conductor when the first electrical signal is not present on the conductor; measuring an aspect of the second electrical signal which it is being applied to the conductor; and reducing an amount of battery power supplied to the accessory when the measured aspect meets a predetermined condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for conserving battery power in a battery operated accessory which is connectable to an audio source via an electrical conductor, the conductor capable of conducting a first electrical signal, containing audio information from the audio source, to the accessory, comprising:
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an electrical signal source that is capable of injecting a second electrical signal into the conductor when the first electrical signal is not present on the conductor; a measurement device that measures an aspect of the second electrical signal while the electrical signal source is injecting the second electrical signal into the conductor; and a logic device for determining whether or not the measured aspect meets a predetermined condition, the logic device reducing an amount of battery power supplied to the accessory when the predetermined condition is met. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of conserving battery power, comprising the steps of:
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providing an electrical conductor that is connectable between an audio source and an accessory of the audio source, the conductor capable of conducting a first electrical signal, containing audio information from the audio source, to the accessory; applying a second electrical signal to the conductor when the first electrical signal is not present on the conductor measuring an aspect of the second electrical signal while it is being applied to the conductor; and adjusting an operating state of the accessory when the measured aspect meets a predetermined condition. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification