Open loop all-digital Class-D amplifiers are uncommon due to the lack of the correcting feedback path leads to several problems resulting in high distortion compared to analog controlled class-D amplifiers. This paper shows that SB-ZePoC lowers switching frequency to 100 kHz. Therefore, these problems can be solved, so that it is possible to design an open loop all-digital class-D audio amplifier with total distortions below 0,01% in the whole listening-band (20 Hz-20 kHz) and an efficiency that reaches 90%. Results of a test-setup will be presented. The sonic performance will be demonstrated during the session.

Authors: Mathis, Wolfgang; Schnick, Olaf
Affiliation: Institute of Electromagnetic Theory, University of Hannover
AES Convention: 120 (May 2006) Paper Number: 6695
Publication Date: May 1, 2006
Session Subject: Signal Processing; High Resolution Audio

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.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

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.