Earphone system for mobile devices

摘要

An earphone system for a mobile device is provided. The earphone system includes an earphone interface with a plurality of contacts for accepting an earphone jack corresponding to 3- or 4-pole earphones, a controller with a plurality of ports for communicating with the earphones that are connected to the earphone interface via the earphone jack, and an earphone compatible circuit. The earphone compatible circuit controls the connection states between the contacts of the earphone interface and the ports of the controller, according to the type of earphone jack inserted into the earphone interface. The earphone compatible circuit connects corresponding contacts of the earphone jack to ports of the controller.

主权项

1. An earphone system, the system comprising:
an earphone interface comprising a plurality of contacts for interfacing with an earphone jack corresponding to each of a 3-pole earphone and a 4-pole earphone; a controller comprising a plurality of ports for communicating with the earphones that are operatively connected to the earphone interface via the earphone jack; and an earphone compatible circuit configured to:
receive a first signal from a first contact of the earphone interface, the first signal corresponding to a signal from a ground pole of the earphone jack or a signal from a microphone pole of the earphone jack, via the first contact of the earphone interface,receive a second signal from a second contact of the earphone interface, the second signal corresponding to a signal from a ground pole of the earphone jack or a signal from a microphone pole of the earphone jack, via the second contact of the earphone interface,control connection states between the contacts of the earphone interface and the ports of the controller according to a type of the earphone jack interfacing with the earphone interface, the type of the earphone jack being determined based on an outcome of a comparison between the first signal and the second signal, andconnect corresponding contacts of the earphone jack to the respective ports of the controller.