Analysis of Digital audio D-class Power Amplifiers Characteristics

V. Puidokas, A. J. Marcinkevičius


The characteristics family and its analysis of experimental research of two digital Sigma-Delta digital-to-analog converter D-Class audio amplifiers (Panasonic SA-XR55 and Texas Instrument TAS5518-5261K2EVM) is presented. The presented characteristics could help to identify amplifiers qualitative and quantitative parameters. Tested: Output-level stability, Level-dependent logarithmic gain (deviation from perfect level linearity), Frequency response, Interchannel separation and Power efficiency. Measurements are made on the basis, but not limited to AES17 standard. Characteristic is compared not only among themselves but also with the manufacturer's documentation. Research results closely coincide with its. The significant characteristics of amplifiers, which is not disclosed in manufacturers datasheets, is established as well. Ill. 7, bibl. 5 (in English; summaries in English, Russian and Lithuanian).

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Print ISSN: 1392-1215
Online ISSN: 2029-5731