Uploaded May 2026 | Updated September 2026, 1 week ago

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#276 In this episode I take a look at another uncommon amplifier topology which like the last time relies on transformer feedback to improve on its proprieties - the augmented amplifier. The main features of the augmented amplifier refer to improved distortion behavior, low noise and reduced input impedance, making it ideal in low noise applications.

Related videos:
Common Base Amplifier (1/2): youtu.be/DJw3jI5dLrQ
Common Base Amplifier (2/2): youtu.be/Q_r2UyYu-r0
Common Collector amplifier (1/2): youtu.be/YsmOYaqFkuc
Common Collector amplifier (2/2): youtu.be/EO3NavaTmXE
Common Emitter amplifier (1/2): youtu.be/D-76AL5fijE
Common Emitter amplifier (2/2): youtu.be/3FioyZGrwCY
Lossless Amplifier: youtu.be/vCHTpsCq8C0
Augmented Amplifier: youtu.be/w7Yih01c4b4

Links and further reading:
patentimages.storage.googleapis.com/c5/d8/e4/3b58e06e0cd513/US6271721.pdf
web.archive.org/web/20200215081927/http:/home.earthlink.net/~christrask/Lossless%20Feedback%20Amplifiers.pdf
george-smart.co.uk/projects/wellgood-loop/wellgood-loop-history
nxp.com/docs/en/data-sheet/BFR92A_N.pdf

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