US 12,490,038 B2
Apparatus and methods for detecting a microphone condition
Anindya Bhattacharya, Austin, TX (US); Bhoodev Kumar, Austin, TX (US); Jaimin Mehta, Austin, TX (US); Yongsheng Shi, Austin, TX (US); Aleksey S. Khenkin, Austin, TX (US); and John L Melanson, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Mar. 21, 2023, as Appl. No. 18/187,186.
Application 18/187,186 is a continuation of application No. 17/108,433, filed on Dec. 1, 2020, granted, now 11,641,558.
Claims priority of provisional application 63/071,109, filed on Aug. 27, 2020.
Prior Publication US 2023/0262404 A1, Aug. 17, 2023
Int. Cl. H04R 29/00 (2006.01)
CPC H04R 29/004 (2013.01) 23 Claims
OG exemplary drawing
 
1. A method for detecting a microphone condition of a microphone, the method comprising:
applying an electrical stimulus to a microphone;
measuring an electrical response to the electrical stimulus at the microphone;
comparing the electrical response to an expected response; and
determining the microphone condition based on the comparison;
wherein the electrical stimulus is applied to a power terminal of the microphone, wherein the electrical response is measured at the power terminal of the microphone; and
wherein the electrical stimulus comprises a bias voltage for biasing the microphone, and wherein the electrical response comprises a bias current of the microphone.