- #1
flash
- 68
- 0
I know the impedance of a capacitor is,
[tex]
\frac {1}{j \omega C}
[/tex]
so in an audio circuit it let's more high frequency energy through, which is obvious looking at the equation. When a capacitor is in parallel with a fixed resistor, I worked out the magnitude of the impedance of the pair to be
[tex]
\frac{R \omega C}{\sqrt{R^2 + (\omega C)^2}}
[/tex]
and this pair should still have lower impedance at higher frequencies, right?
So my question is, how does this expression reflect this? I just can't see it.
[tex]
\frac {1}{j \omega C}
[/tex]
so in an audio circuit it let's more high frequency energy through, which is obvious looking at the equation. When a capacitor is in parallel with a fixed resistor, I worked out the magnitude of the impedance of the pair to be
[tex]
\frac{R \omega C}{\sqrt{R^2 + (\omega C)^2}}
[/tex]
and this pair should still have lower impedance at higher frequencies, right?
So my question is, how does this expression reflect this? I just can't see it.
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