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5 cards from this section. Quick, good the night before a test.
What role does negative feedback play in an amplifier?
Think about the importance of stability versus gain.
Define a pole in the context of feedback systems.
Consider the s-plane and its significance.
What is the main effect of negative feedback on amplifier performance?
Consider how feedback stabilizes systems.
True or False: The positioning of poles has no effect on system stability.
Think about the relationship between poles and system response.
An amplifier has poles at 100Hz and 1KHz. If negative feedback is applied, how do the pole locations change? Derive the new poles using a given feedback factor of B2 = 0.1.
Remember to apply the calculated feedback to each pole.
If the loop gain of a feedback system is critically high, discuss the implications for phase margin and stability in terms of pole proximity to the imaginary axis.
Relate this back to previous discussions on pole placement and stability.
6 more questions in this section. Enroll free to practise them all.
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