Electronic device and external equipment with configurable audio path circuitry
First Claim
1. An audio connector port that is coupled to a wired path, comprising:
- an audio connector;
path configuration circuitry coupled to the audio connector that supports communications over a microphone line in the wired path; and
a hybrid having an input port, a common port, and an output port, wherein the common port is connected to the microphone line, wherein the path configuration circuitry is selectively configurable between;
a unidirectional path state in which analog microphone signals are conveyed over the microphone line without conveying counter-propagating analog audio signals; and
a bidirectional path state in which analog microphone signals are conveyed over the microphone line while analog audio signals are simultaneously counter-propagated over the microphone line, wherein the path configuration circuitry comprises switching circuitry that selectively switches the hybrid out of use and into use to respectively switch between the unidirectional path state and the bidirectional path state.
1 Assignment
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Accused Products
Abstract
Electronic devices and accessories such as headsets for electronic devices are provided. A microphone may be included in an accessory to capture sound for an associated electronic device. Buttons and other user interfaces may be included in the accessories. An accessory may have an audio plug that connects to a mating audio jack in an electronic device, thereby establishing a wired communications path between the accessory and the electronic device. Path configuration circuitry may be used to selectively configure the path between the electronic device and accessory to support different operational modes. Analog audio lines in the wired path may convey left and right channel analog audio channels. When it is desired to convey power over the wired path, one of the analog audio channel lines may be converted to a power line. Audio functionality may be retained by simultaneously converting a unidirectional line into a bidirectional line using hybrids.
57 Citations
24 Claims
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1. An audio connector port that is coupled to a wired path, comprising:
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an audio connector; path configuration circuitry coupled to the audio connector that supports communications over a microphone line in the wired path; and a hybrid having an input port, a common port, and an output port, wherein the common port is connected to the microphone line, wherein the path configuration circuitry is selectively configurable between; a unidirectional path state in which analog microphone signals are conveyed over the microphone line without conveying counter-propagating analog audio signals; and a bidirectional path state in which analog microphone signals are conveyed over the microphone line while analog audio signals are simultaneously counter-propagated over the microphone line, wherein the path configuration circuitry comprises switching circuitry that selectively switches the hybrid out of use and into use to respectively switch between the unidirectional path state and the bidirectional path state. - View Dependent Claims (2, 3, 4)
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5. An electronic device that communicates with external equipment over a wired path that includes a microphone line, right and left channel audio lines, and a ground line, the electronic device comprising:
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an audio connector having contacts that are respectively connected to the microphone line, right and left channel audio lines, and ground line in the wired path; and circuitry coupled to the audio connector, wherein the circuitry is selectively configured to; operate in a first mode in which the circuitry receives analog microphone signals from the external equipment over the microphone line and does not receive power over the right and left channel audio lines in the wired path; and operate in a second mode in which audio signals are transmitted over the microphone line while power is received from the external equipment over at least one of the audio lines. - View Dependent Claims (6, 7, 8)
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9. A method of using an electronic device to communicate with an accessory through an audio connector having a microphone terminal, a ground terminal, and right and left channel audio terminals, comprising:
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placing the electronic device in a first configuration in which analog microphone signals are received from the accessory over the microphone terminal, a direct current (DC) microphone bias voltage is provided from the electronic device to the accessory through the microphone terminal, right channel audio signals are provided from the electronic device to the accessory through the right channel audio terminal, and left channel audio signals are provided from the electronic device to the accessory through the left channel audio terminal; placing the electronic device in a second configuration in which the analog microphone signals are received from the accessory over the microphone terminal while analog audio signals are transmitted to the accessory from the electronic device through the microphone terminal; and conveying a direct-current (DC) voltage through a given one of the audio channel terminals when the electronic device is in the second configuration. - View Dependent Claims (10)
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11. An electronic device that supports communications with electronic equipment, comprising:
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an audio connector having at least a microphone terminal, first and second audio channel terminals, and a ground terminal; a voltage source that produces a voltage; circuitry that supports bidirectional analog audio signal communications through the microphone terminal; and switching circuitry that is selectively configured to; in a first mode of operation, route audio channel signals to the microphone terminal while routing the voltage to the first audio channel terminal; and in a second mode of operation, route the audio channel signals to the first audio channel terminal. - View Dependent Claims (12, 13, 14, 15)
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16. An electronic device that supports communications with external equipment over a wired path, comprising:
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an audio connector that is coupled to the wired path and that has a microphone terminal, a ground terminal, a first audio signal terminal, and a second audio signal terminal; and circuitry that is selectively configured to operate in; a first mode in which a direct-current (DC) voltage passes through the first audio signal terminal, first analog audio channel signals are transmitted through the microphone terminal, and second analog audio channel signals are transmitted through the second audio signal terminal; and a second mode in which the first analog audio signals are transmitted to the external equipment through the first audio signal terminal and the second analog audio signals are transmitted to the external equipment through the second audio signal terminal. - View Dependent Claims (17, 18, 19)
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20. An accessory to which an electronic device may be connected with a wired path, the accessory comprising:
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an audio connector having a microphone terminal, a first audio channel signal terminal, a second audio channel signal terminal, and a ground terminal; a voice microphone; a hybrid having a common port connected to the microphone terminal, an input port that receives microphone signals from the voice microphone, and an output port; and circuitry connected to the audio connector that is selectively configured to; receive analog audio signal through the first audio channel signal terminal in a first mode of operation; and receive a direct-current voltage through the first audio channel signal terminal, receive the analog audio signal through the microphone terminal, and transmit the microphone signals through the microphone terminal in a second mode of operation. - View Dependent Claims (21, 22, 23, 24)
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Specification