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2 cards from this section. Quick, good the night before a test.
What is negative feedback in amplifiers?
Think about what happens to the output relative to the input.
Define frequency response.
Consider how amplifiers behave with different input frequencies.
What does negative feedback do to amplifier gain?
Consider the effect of feedback on system stability.
True or False: Feedback only affects the gain of a system, not the phase.
Think about the comprehensive effects of feedback.
If an amplifier has a gain of 50 and a feedback factor of 0.2, find the adjusted gain and verify if it leads to stability.
Use the feedback gain formula.
Given an amplifier with two poles at -3 Hz and -7 Hz, calculate the changes in pole locations with a feedback factor of 0.15 for both.
Apply the feedback factor to each pole.
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