Low-power method and circuitry of determining headphone type and monitoring activity
AssigneeMarvell International Ltd.
InventorsKapil Jain, Sriharsha Annadore
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Abstract
A method includes detecting insertion of a headphone into an electronic device, comparing a voltage level detected by a detection circuit of the electronic device to a set of threshold voltages to determine a type of the headphone, determining the headphone to be a first type when a first signal travels through the first path to ground, and determining the headphone to be a second type when a second signal travels through the second path to charge the bias capacitor to a reference voltage. The detection circuit includes a first path, a second path, and a bias capacitor.
Claims19
A method comprising:
- detecting insertion of a headphone into an electronic device;
- comparing a voltage level detected by a detection circuit of the electronic device to a set of threshold voltages to determine a type of the headphone, the detection circuit including a first path, a second path, and a bias capacitor;
- determining the headphone to be a first type when a first signal travels through the first path to ground;
- and
- determining the headphone to be a second type when a second signal travels through the second path to charge the bias capacitor to a reference voltage.
A system comprising:
- a detection circuit including a first path, a second path, and a bias capacitor;
- a processor;
- and
- a non-transitory computer readable medium having computer executable instructions stored thereon which, when executed by the processor, performs the following method:
- comparing a voltage level detected by the detection circuit to a set of threshold voltages to determine a type of a headphone;
- determining the headphone to be a first type when a first signal travels through the first path to ground;
- and
- determining the headphone to be a second type when a second signal travels through the second path to charge the bias capacitor to a reference voltage.
Dependencies are inferred from the claim text.