Devices and methods for headphone speaker impedance detection
AssigneeMediatek Inc.
InventorsSung-Han Wen, Po-Yi Lee
Life of this patent
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Abstract
An electronic device includes an impedance detection circuit and a processor. The impedance detection circuit is configured for receiving a test signal, processing the test signal and detecting an impedance of a headphone speaker load by using the test signal to generate a detection result. The processor is coupled to the impedance detection circuit and configured for providing the test signal to the impedance detection circuit, receiving the detection result from the impedance detection circuit, and adjusting a voltage of an audio signal to be provided to the headphone speaker load according to the detection result.
Claims14
An electronic device, comprising:
- an impedance detection circuit, configured for receiving a test signal, processing the test signal using at least a current digital to analog converter and detecting an impedance of a headphone speaker load by using the test signal to generate an impedance detection result;
- and
- a processor, coupled to the impedance detection circuit and configured for providing the test signal to the impedance detection circuit, receiving the impedance detection result from the impedance detection circuit, and adjusting a voltage of an audio signal to be provided to the headphone speaker load through the current digital to analog converter according to the impedance detection result,
- wherein the test signal is a current signal.
A method for headphone speaker impedance detection, comprising:
- providing a test signal through a current digital to analog converter;
- detecting an impedance of a headphone speaker load by using the test signal to generate an impedance detection result;
- and
- adjusting a voltage of an audio signal to be provided to the headphone speaker load through the current digital to analog converter according to the impedance detection result,
- wherein the test signal is a current signal.
Dependencies are inferred from the claim text.