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Datasheets and Specifications
APx581 Datasheet v0
APx581 Full Specifications
AUX-0025 Datasheet v1
Available translations
AUX-0025 Full Specifications
MMK-2 Datasheet v3 (View previous versions)
MMK-2 measurement microphone kit datasheet (includes MMC-3 calibrator).
SWR-2755 Datasheet v1
Dolby/DTS Compliance Projects
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Software
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Technotes and AP Applied
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Test Signals and Waveforms
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User Manuals
AUX-0025 Filter User Manual v2 (View previous versions)
AUX-0025 Filter User Manual
Available translations
DCX-127 Multifunction Module User Manual
DCX-127 Multifunction Module User Manual
DCX-127 User manual v1
PSIA-2722 User Manual v1
PSIA-2722 User Manual
Available translations
SWR-2755 Switcher User Manual v0
SWR-2755 Switcher User Manual
Available translations
Utilities, Projects, & Macros
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Whitepapers, Articles, and Books
Measuring Switch-mode Power Amplifiers
Switch-mode audio power amplifiers are becoming increasingly popular due to their smaller size, lower weight, and improved efficiency. Their advantages are obvious in low power battery operated personal audio players and laptop computers. However they are also progressively displacing more traditional linear designs in mainstream applications such as home entertainment systems, automotive sound systems, and professional installations where high quality audio is important. Measuring the performance of switch-mode amplifiers presents some new and unique challenges. They inherently generate ultra-sonic artifacts and spurious signals with slew rates that can provoke non-linear behavior within the input stages of high quality audio test and measurement equipment. Absolutely worthless and inaccurate results can result unless effective measures are taken to prevent this non-linear behavior. Written by Bruce Hofer.
Available translations
