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3 cards from this section. Quick, good the night before a test.
What is positive feedback?
Think about how signals reinforce each other.
What is one of Barkhausen's criteria?
Consider the required gain for maintaining oscillation.
What must the loop gain be for an oscillator to sustain oscillation?
Think about what happens if the gain is less than one.
In positive feedback, the feedback signal must be in phase with the input signal.
Consider what happens to feedback when signals are out of alignment.
Design an oscillator circuit and analyze how to achieve Barkhausen’s criteria. Detail the components used and how they work together.
Think about how resistors and capacitors can influence gain and phase.
Predict the outcome of a feedback circuit where the gain dips below 1. What implications does this have for the circuit's performance?
Analyze how feedback interacts with the circuit's loss elements.
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