Question

typical values for the pentode amplifier would be R=50,000 ohm ,Rg=500,000ohm and gm=0.0035mho. find the value needed for Cc to make a frequency f1=54Hz
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Answer 1

Given that,

For pentode amplifier,

Resistance R = 59,000 ohm

$R_{g}=500,000\ \Omega$

$g_{m}=0.0035\ m\Omega$

Frequency = 54 Hz[/tex]

We need to calculate the value of Cc

Using formula of Cc

$Cc=\dfrac{1}{2\pi\times f\times R_{g}}$

Put the value into the formula

$Cc=\dfrac{1}{2\times\pi\times54\times500000}$

$Cc=5.894\times10^{-9}\ F$

$Cc=5.89\ nF$

Hence, The value of Cc is 5.89 nF.

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Topic : pentode amplifier

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