Non-inverting amplifier configuration (AQA A-Level Physics): Quizzes

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Non-inverting amplifier configuration
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What does a non-inverting amplifier preserve while amplifying a signal?

The original polarity

What is the gain formula for a non-inverting amplifier?

1+RfR11 + \frac{R_f}{R_1}

What is the minimum gain value for a non-inverting amplifier?

1

Why does a non-inverting amplifier draw no current from the source?

Extremely high input resistance

When does a non-inverting amplifier act as a unity gain buffer?

When R1=0R_1 = 0 or RfR_f is infinite

What is the gain of a unity gain buffer?

1

What does a unity gain buffer provide between circuits?

Isolation

What impedance characteristic prevents current draw from the source?

High input impedance

What does low output impedance allow in a unity gain buffer?

Drive loads without signal loss

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