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2 cards from this section. Quick, good the night before a test.
Define trans-impedance.
Think about how amplifiers convert current to voltage.
What does negative feedback do in amplifier circuits?
Consider its effect on the output relative to the input signal.
What happens to trans-impedance when negative feedback is applied?
Think about how feedback stabilizes signals.
True or False: Negative feedback always increases amplifier gain.
Remember feedback's role in amplifier behavior.
Given a common emitter amplifier with R = 10 kΩ and feedback β = 50, calculate the new Z' considering typical feedback effects.
Focus on the interaction between feedback and resistance values.
If an amplifier initially has an input resistance of 20 kΩ and feedback configuration reduces this by a factor of (1 + βZ'), what is the new input resistance if β = 50?
Work through the feedback formulas carefully.
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