Electronic device, pull-up circuit, and method for suppressing pop sound of earphone

A pull-up circuit, applicable to an electronic device, wherein the electronic device further comprises a controller and a Type-C interface;

• an output terminal of the pull-up circuit is configured to be connected to a Type-C plug of an earphone through a microphone MIC pin of the Type-C interface;
• the controller is configured to control the electronic device to be disconnected from an audio path of the earphone, control an access resistance value of the pull-up circuit to be a first resistance value, and identify normal/reverse insertion of the earphone based on a voltage of the MIC pin of the Type-C interface when the earphone is inserted into the Type-C interface of the electronic device through the Type-C plug;
• and
• the controller is configured to control the access resistance value of the pull-up circuit to be a second resistance value after the identification is completed, and the first resistance value is greater than the second resistance value.

A method for suppressing a POP sound of an earphone, applicable to an electronic device, wherein the electronic device comprises a controller, a pull-up circuit, and a Type-C interface, an output terminal of the pull-up circuit is configured to be connected to a Type-C plug of an earphone through a microphone MIC pin of the Type-C interface;

• the method comprises:
• controlling, by the controller, the electronic device to be disconnected from an audio path of the earphone, controlling an access resistance value of the pull-up circuit to be a first resistance value, and identifying normal/reverse insertion of the earphone based on a voltage of the MIC pin of the Type-C interface when the earphone is inserted into the Type-C interface of the electronic device through the Type-C plug;
• and
• controlling, by the controller, the access resistance value of the pull-up circuit to be a second resistance value after the identification is completed, wherein the first resistance value is greater than the second resistance value.