ELECTRONIC DEVICE AND CONTROL METHOD
First Claim
1. An electronic device comprising:
- a microphone;
a bias-supply device, configured to provide a first bias voltage to serve as an operation voltage of the microphone, when the electronic device is operated in a power-saving mode, such that the microphone transforms a voice signal into a first output signal; and
a voice-recognition device, configured to receive the first output signal and output a control signal, when the first output signal has a predetermined signal, to enable the electronic device be operated in a normal operation mode and the bias-supply device to provide a second bias voltage that is higher than the first bias voltage to serve as the operation voltage of the microphone, such that the microphone transforms the voice signal into a second output signal and outputs the second signal to a core circuit.
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Accused Products
Abstract
An electronic device includes a microphone, a bias-supply device and a voice-recognition device. The bias-supply device is configured to provide a first bias voltage to serve as an operation voltage of the microphone, when the electronic device is operated in a power-saving mode, such that the microphone transforms a voice signal into a first output signal. The voice-recognition device is configured to receive the first output signal and output a control signal, when the first output signal has a predetermined signal, to enable the electronic device be operated in a normal operation mode and the bias-supply device to provide a second bias voltage that is higher than the first bias voltage to serve as the operation voltage of the microphone, such that the microphone transforms the voice signal into a second output signal and outputs the second signal to a core circuit.
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Citations
13 Claims
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1. An electronic device comprising:
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a microphone; a bias-supply device, configured to provide a first bias voltage to serve as an operation voltage of the microphone, when the electronic device is operated in a power-saving mode, such that the microphone transforms a voice signal into a first output signal; and a voice-recognition device, configured to receive the first output signal and output a control signal, when the first output signal has a predetermined signal, to enable the electronic device be operated in a normal operation mode and the bias-supply device to provide a second bias voltage that is higher than the first bias voltage to serve as the operation voltage of the microphone, such that the microphone transforms the voice signal into a second output signal and outputs the second signal to a core circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electronic device comprising:
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a core circuit, having a central processor unit and a codec; a microphone; a bias-supply device, configured to provide a first bias to serve as an operation voltage of the microphone when the electronic device is operated in a power-saving mode, such that the microphone transforms a voice signal into a first output signal; and a voice-recognition device, configured to receive the first output signal and output a control signal, when the first output signal has a predetermined signal, to enable the electronic device be operated in a normal operation mode and the bias-supply device to provide a second bias voltage that is higher than the first bias voltage to serve as the operation voltage of the microphone, such that the microphone transforms the voice signal into a second output signal and outputs the second signal to the codec, wherein the waveform of the predetermined signal is a truncated sine wave; wherein the bias-supply device comprises; a first resistor, having a first terminal coupled to a power voltage and a second terminal coupled to the voice-recognition device; a second resistor, having a first terminal coupled to the power voltage a switching device, configured to selectively couple one of the first resistor and the second resistor to a power input terminal of the microphone.
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13. A control method, comprising:
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providing a first bias voltage to serve as an operation voltage of a microphone and to transform a voice signal into a first output signal by the microphone, when an electronic device is operated in a power-saving mode; switching the operation of the electronic device from the power-saving mode to a normal operation mode, when the first output signal has a predetermined signal; providing a second bias voltage that is higher than the first bias voltage to serve as the operation voltage of the microphone and to transform the voice signal to a second output signal by the microphone, when the electronic device is operated in the normal operation mode; and outputting the second output signal to a core circuit of the electronic device.
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Specification