Operational amplifier (AQA A-Level Physics): Flashcards

Negative feedback

Inverting input at ~$0$ V

$-\frac{R_{\text{f}}}{R_{\text{in}}}$

Inversion of input signal polarity

$180°$ out of phase

Kirchhoff's Current Law (KCL)

$0$ V (grounded)

Infinite open-loop gain

Ratio $\frac{R_{\text{f}}}{R_{\text{in}}}$

Lower distortion