Derive the equations for $A_V$, $A_i$, $R_i$ and $R_o$ for a NPN transistor in CE mode voltage divider bias configuration with $R

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Derive the equations for

$A_V$ ,

$A_i$ ,

$R_i$ and

$R_o$ for a NPN transistor in CE mode voltage divider bias configuration with

$R_E$ unbiased.

written 8.2 years ago by

teamques10 ★ 69k

• modified 8.2 years ago

Mumbai University > Electronics and telecommunication engineering > Sem 3 > Analog electronics 1

Marks: 10M

Years: May 15

analog electronics

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written 8.2 years ago by

teamques10 ★ 69k

AC equivalent circuit:

Let us draw the AC equivalent circuit of voltage divider bias configuration with $R_E$ unbiased

enter image description here

Approximate h-parameter equivalent circuit:

Now replace the transistor in the AC equivalent circuit fig by its hybrid equivalent circuit.

Obtain the expression for $R_i$ and $R'_i$ :

$R_i = \frac{V_b}{ I_b}$ … (1) …

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