In this Masterclass we address several aspects of feedback in audio amplifiers. The focus of this Masterclass, although not entirely math-free, is on providing insight and understanding of the issues involved. Amongst others, we discuss:
- Basics of negative feedback and its influence on amplifier parameters;
- Gotchas, like Slew Rate Limiting;
- The impact of feedback on internal overload;
- Stability of feedback amplifiers;
- Feedback, speed, and the difference between delay and phase shift;
- Positive feedback and its effects;
- Simultaneous application of positive and negative feedback in a 1950s tube amplifier;
- Error Correction according to professor Malcolm Hawksford;
- Error Correction as used in the paX Amplifier published by Elektor in April and May 2008;
- Feedback or Error Correction - a case study: QUAD Current Dumping;
This Masterclass provides a clear overview of the benefits that can be obtained by feedback and its sibling, error correction; but also of its limitations and disadvantages. Recommended to all audio designers and serious audio hobbyists!
On this DVD:
- 140 Min. video presentation
- All material as PDF documents
- Complete Amplifier Design
- More than 100 pages additional PDF documentation
About the presenter:
Jan Didden has spent most of his working life with the Netherlands Air Force and NATO, and in that period wrote many audio design articles for the audio press. After his retirement, he finally found time to finish all those accumulated projects. At present his main interest is on error correction in power amplifiers, which leads to unusual designs. His latest design, the paX power amplifier, was published by Elektor in 2008. Since a few years Jan also publishes Linear Audio, a unique, six-monthly bookzine dedicated to technical audio, with articles written by internationally recognized audio design experts.
This video-DVD can be played stand-alone on any DVD- or BluRay player; no separate computer is required. A PC is required to read or print the included additional material in PDF documents.
Picture format PAL 16:9 | Scene-selection | Stereo sound | Playing time 140 min.