Where in the Wikipedia article does it say it makes the signal clearer? I suspect that you are refering to the use of the RC circuit as a simple filter - in fact its not strictly a parallel arrangement.wikipedia... search RC netowrk
I'm guessing that it is there for completeness. The capacitor would attempt to reduce any voltage ripples from Vin. This would give the "clearer signal" that you mentioned earlier on.yes thanks for the info on filters. But in particular, I'm looking at this:
Anyone knows the purpose of this. From what I know, it's not a LPF, HPF, BSF, or BPF. Thanks!
That's a pretty stupid schematic. Vin and Vout are identical!I'm guessing that it is there for completeness. The capacitor would attempt to reduce any voltage ripples from Vin. This would give the "clearer signal" that you mentioned earlier on.
The description where you linked the image from describes that the capacitor current is 90degress out of phase with Ir & Is. So perhaps the resistor is there to demonstrate the out of phase difference.
As described in the decription of the parallel RC schematic from wikipedia http://en.wikipedia.org/wiki/RC_filterThat's a pretty stupid schematic. Vin and Vout are identical!
A parallel RC network can be part of a lowpass or highpass or allpass filter, depending on the other components in the network.
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by Jake Hertz