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Derive equation of voltage gain, input resistance and output resistance of voltage divider based JFET amplifier.
written 8.8 years ago by gravatar for abgharge abgharge • 260 modified 3.8 years ago by gravatar for pedsangini276 pedsangini276 • 4.8k

Mumbai University > Electronics Engineering > Sem 4 > Discrete Electronic Circuits

Marks: 10M

Year: Dec 2016
discrete electronics
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written 8.8 years ago by gravatar for abgharge abgharge • 260 •   modified 8.8 years ago

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Figure 1: Circuit Diagram of Common Source amplifier.

At mid frequency all connected capacitors acts as short circuit. Hence AC equivalent using JFET becomes,

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Figure 2: Small signal equivalent circuit

Voltage Gain ($A_V$):

$V_O = I_O * R_D$

But $I_O = - Ids$

$V_O = - Ids * R_D$ ....(1) …

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