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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:13 |
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Conference: Bucharest University Faculty of Physics 2007 Meeting
Section: Electricity and Biophysics
Title:
The highlighting of the effects of feedback in amplification with educational purpose
Authors:
Melinda David, Irina Bostan, Adrian Radu
Affiliation:
Universitatea din Bucuresti
E-mail
melinda.david@fizica.unibuc.ro, irina.bostan@fizica.unibuc.ro, adrian.radu@fizica.unibuc.ro
Keywords:
effects of feedback in amplification
Abstract:
The built setup contains a two-floor amplifier with adjustable value of amplification and a feedback floor whose function can be selected appropriately either positive or negative.
The interesting case is when the function of the feedback circuit is a positive one. In this situation we can mark the advantages of the negative feedback (the expansion of the frequency band, the improvement of input and output impedances).
The two floors of amplification were built using operational amplifiers which permits a precise control of the open-loop amplification value in order to prove the obtained analytical relations.
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