Patent ID: 8724826
Filing Date: 2014-05-13
Classification: H04M,H04R

Abstract:
1. A portable terminal for outputting an audio signal, comprising: an internal speaker; an ear jack for connecting the portable terminal to one of an earphone and an external apparatus, wherein the external apparatus includes a speaker; a switch coupled to the internal speaker and the ear jack; an amplifier coupled to the switch and the ear jack, the amplifier being configured to: amplify the audio signal to produce a first audio signal and feed the first audio signal to the switch when the ear jack is connected to the external apparatus or when connection to one of the earphone and the external apparatus is not detected, and amplify the audio signal to produce a second audio signal and feed the second audio signal to the ear jack when the ear jack is connected to the earphone; and a baseband modem coupled to the amplifier and the switch, the baseband modem being configured to: detect whether one of the earphone and the external apparatus is connected to the ear jack based on a voltage value of a signal input from the ear jack; when the external apparatus is connected to the ear jack, cause the amplifier to feed the first audio signal to the switch and cause the switch to switch the first audio signal to the ear jack; and when the earphone is connected to the ear jack, cause the amplifier to feed the second signal to the ear jack; wherein the first audio signal is amplified by a higher power than the second audio signal.