US 12,445,774 B2
Electronic device, pull-up circuit, and method for suppressing pop sound of earphone
Chao Han, Shenzhen (CN); Ting Huang, Shenzhen (CN); and Xinmiao Yan, Shenzhen (CN)
Assigned to Honor Device Co., Ltd., Shenzhen (CN)
Appl. No. 18/553,823
Filed by HONOR DEVICE CO., LTD., Shenzhen (CN)
PCT Filed Apr. 10, 2023, PCT No. PCT/CN2023/087223
§ 371(c)(1), (2) Date Oct. 3, 2023,
PCT Pub. No. WO2023/216787, PCT Pub. Date Nov. 16, 2023.
Claims priority of application No. 202210515566.2 (CN), filed on May 12, 2022.
Prior Publication US 2025/0080907 A1, Mar. 6, 2025
Int. Cl. H04R 3/02 (2006.01)
CPC H04R 3/02 (2013.01) [H04R 2420/05 (2013.01); H04R 2420/09 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electronic device, comprising a controller, a pull-up circuit, and a universal serial bus Type-C interface, wherein
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 further 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.