~~REVEAL~~



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$I.\quad$ Analysis of the Currents
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|by (2)+(3)|$\color{blue}{I_p} = \color{blue}{I_m} = 0$  |
|  | Therefore, $I_p$ and $I_m$ are defined |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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|by (3)+(5)|$\color{blue}{I_o} = I_m = 0$  | 
| | By this, $I_o$ is defined |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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$II.\quad$ Analysis of the Voltage Amplification
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|by (0)  |$\color{blue}{A_V}=\frac{U_O}{U_I}$  |
|  |  $\quad$|
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{U_O}{\color{blue}{U_I}}$  |
|  |with (4)|
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{U_O}{\color{blue}{U_O+U_D}}$  |
|  | $\quad$  |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{\color{blue}{U_O}}{\color{blue}{U_O}+U_D}$  |
|  |with (1) |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{\color{blue}{A_D\cdot U_D}}{\color{blue}{A_D\cdot U_D}+U_D}$  |
|  | $\quad$ |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{A_D\cdot U_D}{A_D\cdot U_D + U_D}$  |
|  | $\quad$ |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\color{blue}{\frac{A_D\cdot U_D}{A_D\cdot U_D + U_D}}$  |
|  |Expand with $\frac{1}{A_D\cdot U_D}$ |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\color{blue}{\frac{A_D\cdot U_D\cdot\frac{1}{A_D\cdot U_D}}{(A_D\cdot U_D + U_D)\cdot \frac{1}{A_D\cdot U_D}}}$  |
|  | $\quad$ |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\color{blue}{\frac{1}{1 + \frac{1}{A_D}}}$  |
|  | $\quad$  |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{1}{1 + \frac{1}{A_D}}$  |
|  | $\quad$  |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{1}{1 + \color{blue}{\frac{1}{A_D}}}$  |
|  |with $\frac{1}{A_D} \xrightarrow{A_D \rightarrow \infty} 0$  |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{1}{1 + \color{blue}{0}}$  |
|  | $\quad$  |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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| $\quad$  |$A_V=\frac{1}{1}=1$  |
|  | $\quad$  |
|$\quad\quad\quad$|$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$|
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