公开(公告)号：US10015607B2

公开(公告)日：2018-07-03

申请号：US15191981

申请日：2016-06-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Shatam Agarwal ,  Alvin Chuck Storvik

IPC: H04R29/00 ,  H04R3/00 ,  H03M1/12 ,  H03M1/66 ,  H03F3/183

CPC classification number: H04R29/001 ,  H03F3/183 ,  H03M1/12 ,  H03M1/46 ,  H03M1/66 ,  H04R3/00 ,  H04R5/04 ,  H04R2420/05

Abstract: An electronic device may be configured to identify a load coupled to the device. The device may measure direct current (DC) and/or alternating current (AC) impedances of the load to identify the load. The device may then take action based on the identification of the load. For example, a specific transducer may be identified as coupled to the electronic device and an appropriate equalization curve applied to an audio output of the device. The measurement of load impedance may include controlling a reference generator according to a search algorithm to identify the load, including compensating the measured impedance for temperature changes. An analog-to-digital converter (ADC) may operate through the search algorithm to provide feedback to digital circuitry regarding how to proceed through the search algorithm to identify the load.

公开(公告)号：US20170245073A1

公开(公告)日：2017-08-24

申请号：US15191981

申请日：2016-06-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Shatam Agarwal ,  Alvin Chuck Storvik

IPC: H04R29/00 ,  H03F3/183 ,  H03M1/66 ,  H04R3/00 ,  H03M1/12

CPC classification number: H04R29/001 ,  H03F3/183 ,  H03M1/12 ,  H03M1/46 ,  H03M1/66 ,  H04R3/00 ,  H04R5/04 ,  H04R2420/05

Abstract: An electronic device may be configured to identify a load coupled to the device. The device may measure direct current (DC) and/or alternating current (AC) impedances of the load to identify the load. The device may then take action based on the identification of the load. For example, a specific transducer may be identified as coupled to the electronic device and an appropriate equalization curve applied to an audio output of the device. The measurement of load impedance may include controlling a reference generator according to a search algorithm to identify the load, including compensating the measured impedance for temperature changes. An analog-to-digital converter (ADC) may operate through the search algorithm to provide feedback to digital circuitry regarding how to proceed through the search algorithm to identify the load.