SaM - Non-Inverting Operational Amplifier

Remeber:

$V_{out}=V_{in}\frac{1}{\beta }$Where:$\beta =\frac{R_1}{R_1+R_2}$

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Memory Card

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• Circuit
  
• Formula:$V_{out}=V_{in}\left(1+\frac{R_2}{R_1}\right)$
• Formula with $\beta$:$V_{out}=V_{in}\frac{1}{\beta }$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 $\beta$:$V_{out}=V_{in}\cdot \frac{A}{1+A\beta }$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