Because of their high efficiency, low volume, and reduced weight, switched Class D audio amplifiers exist in a wide range of applications. However, there are difficult technical issues. This research presents a multiloop feedback topology for the PWM Class D high-quality audio amplifiers that includes: (a) the output filter inside the feedback loop, (b) the means for directly regulating the load voltage, and (c) compensation of the nonlinearities of the output filter. This approach guarantees a flat frequency response regardless of the load and provides a low THD even when smaller, less linear, and less expensive output filter components are used. The theory of the multiloop configuration is analyzed. The proposed topology was built into an integrated power amplifier, which demonstrates the effectiveness of this approach.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
