Circuit apparatus for recognizing earphone in mobile terminal
AssigneeSamsung Electronics Co., Ltd.
InventorWoo-Cheol LEE
Life of this patent
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Abstract
A circuit apparatus for recognizing an earphone in a mobile terminal is provided. The apparatus includes a plurality of devices, a wiring for recognizing the number of poles of the earphone, and a comparator. The plurality of devices are connected between a microphone bias power and a wiring that receives a signal from a microphone of an earphone. The wiring that recognizes the number of poles of the earphone branches from a wiring between at least two of the devices. The comparator compares a voltage of the wiring that recognizes the number of poles with a reference voltage to output a result signal.
Claims13
A circuit apparatus for recognizing an earphone in a mobile terminal, the apparatus comprising:
- a plurality of devices connected between a microphone bias power and a wiring that receives a signal from a microphone of an earphone;
- a wiring, for recognizing the number of poles of the earphone, that branches from between at least two of the devices;
- and
- a comparator for comparing a voltage of the wiring that recognizes the number of poles with a reference voltage to output a result signal.
Dependencies are inferred from the claim text.