FEEDBACK ADAPTIVE NOISE CANCELLATION (ANC) CONTROLLER AND METHOD HAVING A FEEDBACK RESPONSE PARTIALLY PROVIDED BY A FIXED-RESPONSE FILTER
摘要
A controller for an adaptive noise canceling (ANC) system simplifies the design of a stable control response by making the ANC gain of the system independent of a secondary path extending from a transducer of the ANC system to a sensor of the ANC system that measures the ambient noise. The controller includes a fixed filter having a predetermined fixed response, and a variable filter coupled together. The variable response filter compensates for variations of a transfer function of a secondary path that includes at least a path from a transducer of the ANC system to a sensor of the ANC system, so that the ANC gain is independent of the variations in the transfer function of the secondary path.
申请公布号
WO2017029550(A1)
申请公布日期
2017.02.23
申请号
WO2016IB01234
申请日期
2016.08.19
申请人
CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD;LU, Yang;HELLMAN, Ryan, A.;ZHOU, Dayong