Class D ampli ers can represent signals with three di erent output levels, +V_cc, 0, -V_cc, with no distortion. Exploiting this in order to achieve a better performance with no switching frequency increase, an extension to the classic Pulse Width Modulation two level A/D conversion is proposed. Coding is achieved by extending output waveforms of a Trellis based Sigma Delta Modulation to three levels. Simulation results have shown that, using the same symbol rate, a three level pattern achieved from 3:7 to 8:2 dB of SINAD improvement and a power consumption up to 5 times smaller.

Authors: Ausiello, Ludovico; Rovatti, Riccardo; Setti, Gianluca
Affiliations: ARCES University of Bologna; ENDIF University of Ferrara(See document for exact affiliation information.)
AES Convention: 120 (May 2006) Paper Number: 6696
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.