State-of-the-art audio amplifier can be classified into two major classes: Linear Amplifiers and Switching Amplifiers. The former class features low distortion but poor efficiency, while the latter feature high efficiency coupled with high distortion and low bandwidth. In this paper a hybrid architecture is presented, that combines linear and switching topology, in order to obtain an audio amplifier featuring high efficiency, low distortion and high bandwidth. The intrinsic structure of the switching stage allows an automatic spreading of the switching frequency, reducing EMI issues. A prototype amplifier was realized, tailored for automotive applications. The proposed architecture is patent pending.
Authors:
Bellini, Alberto; De Benedetti, Antonio; Franceschini, Giovanni; Burlenghi, Michele; Violi, Francesco
Affiliations:
University of Parma, Parma, ITALY ; ASK Industries, Reggio Emilia, ITALY(See document for exact affiliation information.)
AES Convention:
116 (May 2004)
Paper Number:
6001
Publication Date:
May 1, 2004
Session Subject:
Automotive Audio; Instrumentation and Measurement
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.