Date: Friday, March 10 2023
Location: Chip
Time: 10:45 - 12:30
Question of the day
How do we account for the noise of the feedback networks?
SLiCAP files hearing loop system design feedback amplifier types: Lecture7.zip
See also the HTML report SLiCAP Hearing Loop Project -7-
Noise performance of feedback amplifiers
In general, insertion of impedances in series and/or in parallel with the signal path should be avoided. They increase:
Energy storage and power losses
Noise
Presentation
The presentation “Influence of Feedback Networks on Noise Performance of Negative Feedback Amplifiers” shows that detrimental effects caused by impedances in the feedback networks can be kept low.
Presentation in parts
Influence of Feedback Networks on Noise Performance of Negative Feedback Amplifiers (parts)
Video
Noise behavior of negative feedback amplifiers (19:42)
Study
Chapter 7.4, 7.5
Exercises
Assign values for the feedback elements of the receive amplifier of the hearing loop system, given a maximum transmitter current drive capability from previous homework.
Determine the maximum values for the equivalent-input noise voltage spectral density and the equivalent-input noise current spectral density of the controller in the receiver. You may ignore the noise contribution of the transmitter.
