Reducing Audio Distortion in an Audio System

摘要

An audio system comprises an audio driver configured to receive a target audio signal and a feedback signal and to generate an adjusted audio signal responsive to the target audio signal and the feedback signal. A loudspeaker is configured to convert the adjusted audio signal into acoustical sound. A test signal generator is configured to generate a test signal having a higher frequency than the target audio signal. The test signal causes a test current to flow through the loudspeaker. A current sensing circuit is configured to measure the test current flowing through the loudspeaker and to generate a current sense signal indicative of the test current. A feedback circuit is configured generates the feedback signal responsive to the current sense signal.

主权项

1. An audio system comprising:
an audio driver configured to receive a target audio signal and a feedback signal and to generate an adjusted audio signal responsive to the target audio signal and the feedback signal; a loudspeaker configured to convert the adjusted audio signal into acoustical sound; a test signal generator configured to generate a test signal having a higher frequency than the target audio signal, the test signal causing a test current to flow through the loudspeaker; a current sensing circuit configured to measure the test current flowing through the loudspeaker and to generate a current sense signal indicative of the test current; and a feedback circuit configured to generate the feedback signal responsive to the current sense signal.