The ideal operational amplifier (AQA A-Level Physics): Flashcards

Increases the strength of an analogue signal

$A = \frac{V_{out}}{V_{in}}$

$V_{-}$

$V_{+}$

No feedback; very high gain

Feedback from output to input; stabilises gain

$V_{out} = A_{OL}(V_{+} - V_{-})$

Infinite

Infinite (no current drawn from inputs)

Output cannot exceed supply voltage limits