SaM - Inverting Operational Amplifier

Remeber:

$V_{out}=V_{in}\cdot -\frac{R_2}{R_1}$

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Memory Card

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• Circuit
  
• Formula:$V_{out}=-V_{in}\frac{R_2}{R_1}$
• Formula with $\beta$:$V_{out}=V_{in}(1-\beta )$Where:$\beta =\frac{R_1}{R_1+R_2}$And the formal definition of $\beta$, the feedback factor is:$\beta \triangleq \frac{V^{-}}{V_{out}}$
• Formula with $A(f)$ and $\beta$:$V_{out}=V_{in}\cdot -\frac{R_2}{R_1}\frac{A\beta }{1+A\beta }$Where $A(f)$ is the open-loop gain of the amplifier, often defined as:$A(f)=\frac{A_{DC}}{1+j\frac{f}{f_H}}$And:$V_{out}=A(f)\cdot (V^{+}-V^{-})$
• Sources:
  • PDF