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Arjob Mukherjee
Arjob Mukherjee
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I have this simple circuit. And from what I calculated the output impedance seen from the OUT node comes to about \$138.765 \Omega\$.

$$ X_c = \frac{1}{2\pi * 890*10^3 * 10^{-9}} = 178.8257\Omega $$ $$ Z_{out} = R2||X_c = \frac{220 * 178.8257}{\sqrt{220^2 + 178.8257^2}} = 138.765\Omega$$ enter image description here

With an input of 890K Hz sine wave of 2v pk-pk, the voltage at OUT node comes to is about 1.2615v pk-pk.

If I connect a resister of the same value of \$138.765 \Omega\$, the voltage at OUT node should be half ed.

enter image description here

But I see a voltage of 697.843mV instead of 630mV. What is the problem, am I calculating the output impedance wrongly?

I have this simple circuit. And from what I calculated the output impedance seen from the OUT node comes to about \$138.765 \Omega\$.

enter image description here

With an input of 890K Hz sine wave of 2v pk-pk, the voltage at OUT node comes to is about 1.2615v pk-pk.

If I connect a resister of the same value of \$138.765 \Omega\$, the voltage at OUT node should be half ed.

enter image description here

But I see a voltage of 697.843mV instead of 630mV. What is the problem, am I calculating the output impedance wrongly?

I have this simple circuit. And from what I calculated the output impedance seen from the OUT node comes to about \$138.765 \Omega\$.

$$ X_c = \frac{1}{2\pi * 890*10^3 * 10^{-9}} = 178.8257\Omega $$ $$ Z_{out} = R2||X_c = \frac{220 * 178.8257}{\sqrt{220^2 + 178.8257^2}} = 138.765\Omega$$ enter image description here

With an input of 890K Hz sine wave of 2v pk-pk, the voltage at OUT node comes to is about 1.2615v pk-pk.

If I connect a resister of the same value of \$138.765 \Omega\$, the voltage at OUT node should be half ed.

enter image description here

But I see a voltage of 697.843mV instead of 630mV. What is the problem, am I calculating the output impedance wrongly?

Source Link
Arjob Mukherjee
Arjob Mukherjee
  • 618
  • 7
  • 18

What is the output impedence of this RC Circuit

I have this simple circuit. And from what I calculated the output impedance seen from the OUT node comes to about \$138.765 \Omega\$.

enter image description here

With an input of 890K Hz sine wave of 2v pk-pk, the voltage at OUT node comes to is about 1.2615v pk-pk.

If I connect a resister of the same value of \$138.765 \Omega\$, the voltage at OUT node should be half ed.

enter image description here

But I see a voltage of 697.843mV instead of 630mV. What is the problem, am I calculating the output impedance wrongly?