Patent ID: 9538276
Date: 2017-01-03
CPC Classifications: H01R,H04M,H04R

Claim:
1. An earphone connection interface, comprising: a terminal left terminal, a terminal right terminal, a terminal ground terminal, an earphone detection terminal, and a terminal microphone terminal disposed at an inner wall of a groove; a switch element for selectively converting an electrical potential of the terminal microphone terminal, the switch element having a control terminal; a capacitor connected to the terminal microphone terminal through the switch element; and an ear microphone bias voltage source, wherein the switch element forms a first circuit path to electrically connect the terminal microphone terminal and the capacitor so that the capacitor is charged by the ear microphone bias voltage source while a voltage of the ear microphone bias voltage source is provided to the terminal microphone terminal, and wherein the switch element forms a second circuit path to electrically disconnect the terminal microphone terminal and the capacitor so that electric charges of the capacitor are not induced to an earphone device through the terminal left terminal or the terminal right terminal.