Patent ID: 9407987
Filing Date: 2016-08-02
CPC Classification: H04R

Claim Text:
1. An audio interface self-adaption device, comprising an audio interface, the audio interface comprising a pin 1 , a pin 2 , a pin 3 , and a pin 4 , one of the pin 3 and the pin 4 being a microphone pin of the audio interface, and the other one of the pin 3 and the pin 4 being a ground pin, wherein the device further comprises a first level comparison module, a second level comparison module, a PNP triode Tc, a power output terminal VBAT, a switching module, a resistor R 2 a , and a resistor R 2 b , wherein the first level comparison module comprises a NPN triode Ta, and the NPN triode Ta comprises a base connected to a first pin, an emitter connected to a second pin, and a collector connected to a base of the PNP triode Tc via the resistor R the second level comparison module comprises a NPN triode Tb, and the NPN triode Tb comprises a base connected to the second pin, an emitter connected to the first pin, and a collector connected to a signal input pin Sel of the switching module and connected to the base of the PNP triode Tc via the resistor R an emitter of the PNP triode Tc is connected to the power output terminal VBAT, and a collector of the PNP triode Tc is connected to a power input pin VCC of the switching module; a first input pin B the switching module is configured to connect one of the first input pin B an audio pin being the pin the first pin is one of the pin