Signal transmission path selection circuit and method, and electronic device employing the circuit
First Claim
1. An electronic device comprising:
- a central processing unit;
a USB connector;
a USB switch interconnecting said central processing unit and said USB connector, and having a data transmission path and an audio signal transmission path for signal transmission between said central processing unit and said USB connector, said USB switch selecting said data transmission path for transmission of data according to a first selection signal from said central processing unit, and selecting said audio signal transmission path for transmission of audio signals according to a second selection signal from said central processing unit; and
an audio path selector electrically connected to said central processing unit and said USB switch, and having a first audio path for output of audio signals from said central processing unit to said audio signal transmission path of said USB switch, and a second audio path for output of audio signals from said audio signal transmission path of said USB switch to said central processing unit.
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Accused Products
Abstract
An electronic device includes a central processing unit, a USB connector, a USB switch, and an audio path selector. The USB switch has a data transmission path and an audio signal transmission path for signal transmission between the central processing unit and the USB connector. The USB switch selects the data transmission path for data transmission according to a first selection signal from the central processing unit, and selects the audio signal transmission path for audio signal transmission according to a second selection signal from the central processing unit. The audio path selector interconnects the central processing unit and the USB switch, and has a first audio path for output of audio signals from the central processing unit to the audio signal transmission path, and a second audio path for output of audio signals from the audio signal transmission path to the central processing unit.
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Citations
20 Claims
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1. An electronic device comprising:
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a central processing unit; a USB connector; a USB switch interconnecting said central processing unit and said USB connector, and having a data transmission path and an audio signal transmission path for signal transmission between said central processing unit and said USB connector, said USB switch selecting said data transmission path for transmission of data according to a first selection signal from said central processing unit, and selecting said audio signal transmission path for transmission of audio signals according to a second selection signal from said central processing unit; and an audio path selector electrically connected to said central processing unit and said USB switch, and having a first audio path for output of audio signals from said central processing unit to said audio signal transmission path of said USB switch, and a second audio path for output of audio signals from said audio signal transmission path of said USB switch to said central processing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A signal transmission path selection circuit, comprising:
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a USB switch having a data transmission path and an audio signal transmission path, said USB switch selecting the data transmission path for data transmission according to a first selection signal, and selecting the audio signal transmission path for transmission of audio signals according to a second selection signal; and an audio path selector electrically connected to said USB switch, and having a first audio path for output of received audio signals to said audio signal transmission path of said USB switch, and a second audio path for output of audio signals from said audio signal transmission path of said USB switch. - View Dependent Claims (12, 13, 14, 15)
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16. A signal transmission path selection method for use between a central processing unit and a USB connector of an electronic device, said signal transmission path selection method comprising:
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(A) providing a data transmission path and an audio signal transmission path for signal transmission between the central processing unit and the USB connector; (B) selecting the data transmission path for transmission of data according to a first selection signal from the central processing unit, and selecting the audio signal transmission path for transmission of audio signals according to a second selection signal from the central processing unit; and (C) providing a first audio path and a second audio path between the audio signal transmission path and the central processing unit, the first audio path being for output of audio signals from the central processing unit to the audio signal transmission path, the second audio path being for output of audio signals from the audio signal transmission path to the central processing unit. - View Dependent Claims (17, 18, 19)
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20. A signal transmission path selection method, comprising:
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(A) providing a data transmission path and an audio signal transmission path for signal transmission, selecting the data transmission path for transmission of data according to a first selection signal, and selecting the audio signal transmission path for transmission of audio signals according to a second selection signal; and (B) providing a first audio path and a second audio path, the first audio path being for output of received audio signals to the audio signal transmission path, the second audio path being for output of the audio signals from the audio signal transmission path.
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Specification